CA1262936A - Auxiliary equipment mounting ring for electric meter - Google Patents
Auxiliary equipment mounting ring for electric meterInfo
- Publication number
- CA1262936A CA1262936A CA000485241A CA485241A CA1262936A CA 1262936 A CA1262936 A CA 1262936A CA 000485241 A CA000485241 A CA 000485241A CA 485241 A CA485241 A CA 485241A CA 1262936 A CA1262936 A CA 1262936A
- Authority
- CA
- Canada
- Prior art keywords
- base
- base ring
- meter
- kilowatt
- posts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
Abstract
ABSTRACT OF THE DISCLOSURE
A support structure is provided that enables an existing kilowatt-hour meter to be updated with additional auxiliary electronic components. The support structure comprises a base ring that is shaped to be received within a circular slot of an existing kilowatt-hour meter and latches are provided that lock the base ring between the existing base portion of a kilowatt-hour meter and its frame. A plurality of support plates are attached to the base ring by a plurality of posts. The base ring and posts are disposed in a radial pattern about the central axis of symmetry of the base ring in such a way so as to permit the support structure to pass over and extend beyond the existing components of the original kilowatt hour meter.
Electrical connection between existing meter components and auxiliary electronic components is provided by flexible ribbon connectors, cables or individual conductors and an elongated cover is used to provide protection of both the original kilowatt-hour meter and the auxiliary components.
A support structure is provided that enables an existing kilowatt-hour meter to be updated with additional auxiliary electronic components. The support structure comprises a base ring that is shaped to be received within a circular slot of an existing kilowatt-hour meter and latches are provided that lock the base ring between the existing base portion of a kilowatt-hour meter and its frame. A plurality of support plates are attached to the base ring by a plurality of posts. The base ring and posts are disposed in a radial pattern about the central axis of symmetry of the base ring in such a way so as to permit the support structure to pass over and extend beyond the existing components of the original kilowatt hour meter.
Electrical connection between existing meter components and auxiliary electronic components is provided by flexible ribbon connectors, cables or individual conductors and an elongated cover is used to provide protection of both the original kilowatt-hour meter and the auxiliary components.
Description
33~
1 51,831 AUXILIARY EQUIPMENT MOUNTING RI~G
FOR ELECTRIC METER
BACKGR0UND AND SUMM~RY OF THE INVENTION
'The present invention relates generally to electric utility apparatus and, more particularly, to an `apparatus for modifying an existing electric equipment to '5 incorporate additional auxiliary components.
,Electric meters and other wall-mounted electrical equipment have been used for many years by electric utility companies and others to measure the energy consumption of their customers or to per~orm other functions. The various j10 types of wall mounted electrical equipment includes kilowatt-hour meters, load management terminals, transpon-!~ders and other equipment related to either the measurement of electric energy consumption or power line communications equipment. In its simplest form, a kilowatt-hour meter incorporates an energy measurement apparatus that is responsive to the consumption of electrical energ~ and a registering device that ls able to visually indicate or electrically communicate the cumulative consumption of the measured quantity. The registering device, which is generally a dial indicator register, a cyclometer register or an electronic register, enables the consumer or a meter reader to visually determine the accumulated kilowatt-hours of energy consumption used by the consumer at whose loca-tion the electrical meter is located. Typical ~5 kilowatt-hour meters that are known to those skilled in the art utilize a rotatable disk that rotates in response to .
1 51,831 AUXILIARY EQUIPMENT MOUNTING RI~G
FOR ELECTRIC METER
BACKGR0UND AND SUMM~RY OF THE INVENTION
'The present invention relates generally to electric utility apparatus and, more particularly, to an `apparatus for modifying an existing electric equipment to '5 incorporate additional auxiliary components.
,Electric meters and other wall-mounted electrical equipment have been used for many years by electric utility companies and others to measure the energy consumption of their customers or to per~orm other functions. The various j10 types of wall mounted electrical equipment includes kilowatt-hour meters, load management terminals, transpon-!~ders and other equipment related to either the measurement of electric energy consumption or power line communications equipment. In its simplest form, a kilowatt-hour meter incorporates an energy measurement apparatus that is responsive to the consumption of electrical energ~ and a registering device that ls able to visually indicate or electrically communicate the cumulative consumption of the measured quantity. The registering device, which is generally a dial indicator register, a cyclometer register or an electronic register, enables the consumer or a meter reader to visually determine the accumulated kilowatt-hours of energy consumption used by the consumer at whose loca-tion the electrical meter is located. Typical ~5 kilowatt-hour meters that are known to those skilled in the art utilize a rotatable disk that rotates in response to .
2 51,831 electrical energy consumption. The rotatable disk revolves about an axis that is appropriately coupled, through a plurality of gears and shafts, to a register.
The most commonly used type of register used with an electric utility meter typlcally comprises a plurality of shafts with each shaft connected to a dial indicator, or pointer. The shafts extend through holes in a faceplate of the register and the faceplate is provided with indicia that enables a visual determination of the numeric values corresponding to the positions of each dial. The regis-ter's shafts are typically associated in a decade relation ship so that the cumulative energy consumption can be readily observed from the positions of the dial indicators with respect to their associated indicia. U.S~ Patent No.
The most commonly used type of register used with an electric utility meter typlcally comprises a plurality of shafts with each shaft connected to a dial indicator, or pointer. The shafts extend through holes in a faceplate of the register and the faceplate is provided with indicia that enables a visual determination of the numeric values corresponding to the positions of each dial. The regis-ter's shafts are typically associated in a decade relation ship so that the cumulative energy consumption can be readily observed from the positions of the dial indicators with respect to their associated indicia. U.S~ Patent No.
3,178,110 which issued to Knecht et al. on April 13, 1965 discloses a meter register. Many other types of registers are known to those skilled in the art. For example, cyclometer registers incorporate a plurality of drums on which numerical indicia are lmposed. The indicia drums rotate in response to electrical energy users and the cumulative value of consumption at any time can be read directly from the front portion of the register. Also, electronic reyisters can be used in conjunction with kilowatt hour meters. These registers provide digital representations of cumulative electrical energy usaye by being operatively associated with a pulse counting device and related electronic circuitry.
In recent years, many technological advances ha~e occurred in the field of electrical metering. For example, time of-use (TOU) meters have been developed that enable a~
electric utility to incorporate a multirate billing system that varies as a function of the time of day or day of the year when the electrical energy is consumed. A multiple rate Meter is disclosed in U.S. Patent No. 4,081,746 which issued to Snyder et al. on March 28, 1978 and an improved clutch mechanism for time of day registers is disclosed in U.S. Patent No. 4,307,341 which issued to Benbow et al. on 3 51,831 December 22, 1981. Furthermore, demand meters have been developed that measure the consumer's electrical power demands over predetermined periods of time duriny the building period. A demand meter is disclosed in U.S.
Patent No. 3,913,014, which issued to Halstead on October 14, 1975 and an on-peak watt-hour demand meter with disc loading compensation is disclosed in U.S. Patent No.
In recent years, many technological advances ha~e occurred in the field of electrical metering. For example, time of-use (TOU) meters have been developed that enable a~
electric utility to incorporate a multirate billing system that varies as a function of the time of day or day of the year when the electrical energy is consumed. A multiple rate Meter is disclosed in U.S. Patent No. 4,081,746 which issued to Snyder et al. on March 28, 1978 and an improved clutch mechanism for time of day registers is disclosed in U.S. Patent No. 4,307,341 which issued to Benbow et al. on 3 51,831 December 22, 1981. Furthermore, demand meters have been developed that measure the consumer's electrical power demands over predetermined periods of time duriny the building period. A demand meter is disclosed in U.S.
Patent No. 3,913,014, which issued to Halstead on October 14, 1975 and an on-peak watt-hour demand meter with disc loading compensation is disclosed in U.S. Patent No.
4,156,184, which issued to Benbow on May 22, 1979.
Besides kilowatt-hour me-ters, many other types of electrical equipment are used by electrical utilities. For example, load mana~ement terminals can be located at a consumer's residence for the purpose of load shedding during periods of peak demand. In a typical system of this type, the electric utility would send modulated signals to particular load management terminals that command the terminals to shed specific non-essential loads at the customer's residence. Some load management terminals only ha~e the ability to receive signals which are transmitted on the power line and to respond to commands received in this manner from a central location. Other load management terminals also have the capability of both transmitting and receiving power line communication signals. This capabili-ty permits the load management terminal to not only respond to commands received from a central utility location, but also to transmit data from the consumer's residence to a central location. This data would typically comprise meter reading data or other status-related signals.
Many recent developments in the field o~ electri-cal measurement and powerline communications in recent years relate to the increased use o~ electronic circuitry within the ~ilowatt-hour meter. The use of solid state components and microprocessors within electric equipment, such as meters or load management terminals, is rapidly becoming common place. The use of microprocessors, or microcomputers, within these types of electrical equipment vastly increases its capabilities and expands the type of information that it can provide to both the electric 4 51,~31 utility and the consumer. For example, in order to display the many types of numeric information that can be provided by a ~ilowatt-hour meter, electronic reyisters have been developed. These electronic registers display data on an alphameric panel which is able to sequentially display a plurality of values, whereas a mechanical register requires a single dial indicator and associated shaft for every digit of a measured quantity.
Microprocessors permit electrical equipment, which is located at a consumer's residence, to perform complex demodulation and modulation of powerline communication signals, accurately read the meter and perform load shed-ding operations.
When an electric utility desires to upgrade its metering or load control capability, it faces a potentially expensive procedure. For each conventional kilowatt~hour meter that is replaced by a more sophisticated meter, the utility must not only consider the additional cost for the more technologicaLly advanced meter, but also the potential loss due to their increased inventory of the unused meters.
When a conventional watt-hour meter is replaced by a more sophisticated meter, some of the capabilities of the simpler meter are necessarily reproduced in the new meter.
This represents an unnecessary expense because a portion of the cost for the new meter relates to replacement of components that were part of the replaced meter.
Therefore, when an electric utility replaces an existing electrical apparatus with a more complicated and technologically advanced device, a portion of the incurred expense represents the replacement of existing components with redundant components in the new device. It would therefore be economically advantageous if an existing apparatus, such as a watt-hour meter, could be upgraded without the need to replace its existing components that would also be required in the new meter. For example, if a meter could be upgraded by merely adding auxiliary equip-ment, significant savings could be realized.
S 51,8~1 The present invention will be described in terms of its particular application to a kilowatt hour meter.
However, it should be understood that alternative embodi-ments o the present invention could also be used to provide a means for attaching and supportiny auxiliary components to existing electrical apparatus. The support structure of the present invention could be used, for example, in association with kilowatt hour meters, load management terminals, metering and control transponders, and many other types of wall-mounted electrical apparatus that is commonly used by electrical utility companies.
Furthermore, although a particular embodiment of the present invention utilizes a ring-shaped base as its means for attaching the support structure to the base of the electrical apparatus, it should be understood that various other shapes of the attachment means can be used. Also, the ring-shaped base o the support structure is described as being attachable to the base by means of a plurality of latches. It should be understood that many alternative attaching means, such as screws, are also within the scope of the present invention. For convenience, the present invention is described herein in terms of a particular embodiment that is applicable for use i.n association with kilowatt hour meters.
The present invention relates to an apparatus for upgrading existing electrical apparatus, such as meters, with auxiliary electronic equipment. It comprises a support structure that has an attachment means, such as a base ring, shaped to fit into the base of the electrical apparatus in rotatable association therewi-th. Many exist-ing meter bases have a pair of molded rings in their bases.
These rings, or functionally similar configurations, cooperate with a gasket in order to provide an effective seal between the cover and the base of a kilowatt-hour meter. When applied in association with a kilowatt hour meter that has a base with molded rings, the base ring of the present invention is shaped to fit with the molded 3~i 6 51,831 rings ln such a way so as to prevent relative motion in all directions except in the direction of rotation about the central axis of symmetry of both the hase ring and the molded rings of the meter's base.
The base ring of the preserlt invention is provid-ed with a plurality of latches that are rotatably connected to it. Each of the latches, when rotated about their individual centers of rotation, move their latch portions radially inward in such a way so as to abut a portion of the meter structure. When the latches are rotated about their individual axes of rotation, they prevent the base ring from rotating about its central axis of symmetry because they abut components of the meter base structure.
They also are engaged bPtween the base ring and a frame portion of the meter structure. Therefore, the base ring is attached to the meter base in such a way so as to prevent its rotation about its central axis symmetry and its movement in a direction away from the meter base. It should be understood that, although these latches provide a convenient way of attaching the support structure of the present invention to the apparatus, alternative methods of attachment are also possible. For example, the base ring could be screwed or bolted to the meter base.
The base ring of the present invention is provid-ed with a plurality of posts that are attached to it and extend in a direction away from the meter's base. Each of the posts has one of its ends attached to the base ring and extends in a direction which is generally parallel to the central axis of symmetry of the base ring. These posts are used to support one or more support plates. Each mounting plate is attached to the posts in such a way so as to hold the mounting plate in a configuration which is generally perpendicular to the central axis of symmetry of the base ring. The primary function of the posts is to support the support plates at a position which extends beyond the original components of the meter. This enables additional electrical devices to be attached to the support plates in ~:6~
7 51,831 a position which does not interfere with the components of the original meter. It should be understood that the support plates would normally comprise a combination of plates, brackets and circuit boards.
The support plates of the present invention can be provided with an opening that is yenerally aligned with the indicia portion of the register's front plate when the present invention is attached to a meter. The dial indica-tors of the register and the opening in the support plates are aligned along a line that is generally parallel to the central axis of symmetry of the base ring. Since the mechanical register of a typical kilowatt-hour meter is generally disposed in a configuration that is readily visible in a direction perpendicular to the base of the meter, the openings in the support plates o the present invention permit visual observation of the dial indicators through the support plate structure. Of course, it should be understood that the openings in the support plates are not required if no visual register is to be disposed behind them. In applications of the present invention that relate to load management terminals, transponders or other elec-trical apparatus which does not utilize a manually readable register, the support plates of the present invention can be incorporated without the use of these openings.
Besides supporting a plurality of electronic devices, the support plates of the present invention are also able to provide support for an additional el,ectronic régister that can be added, as auxiliary equipment, to an existing kilowatt-hour meter. When an electronic register is used in accordance with the present invention, a pulse initiator is attached to the frame of the existing meter and a flexible conductor is used to provide electrical communications between the pulse initiator and the elec-tronic register. Of course, it should be understood that the present invention is applicable with many different types of electrical apparatus. In some applications, the pulse inltiator may be mounted on a remote meter and the 33~
8 51,~31 signals from the pulse initiator are communicated to the electrical apparatus comprising the present inven-tion along signal wlres. This would be a typical application in situations where the present invention is used in conjunc-tion with load management terminals, either pluggable orsurface mounted, which do not contain their own meters.
Various types of pulse initiators are known to those skilled in the art. A photoelectric pulse initiator is disclosed in U.S. Patent No. 4,047,024, which issued to 10 Henderson on September 6, 1977. A direction sensitive opto-elec-tronic pulse initiator for electrical meters is disclosed in U.S. Patent No. 4,034,292, which issued to McClelland on July 5, 1977 and a direct input photoelectric pulse initiator for meter telemetry and recording systems 15 is disclosed in U.S. Patent No. 3,943,498, which issued to McClelland et al. on March 9, 1976. Furthermore, flexible conductors are used to provide electrical communlcation between the existing portions of the original meter and the additional electronic components attached to the support ; 20 plates.
The radial and longitudinal dimensions o the suppoxt structure of the present invention permit a cover to fit over the support structure and be attached to the base of the meter. Although the cover of the present invention is generally larger, in a longitudinal direction, than the original cover used by the existing watt-hour meter, its radial dimensions remain generally the same.
The increased longitudinal dimension of the meter cover is related to the additional electronic equipment supported by the support plates and posts of the present invention. The cover generally has a transparent portion disposed in alignment with the opening of the support plates and the indicia that are associated with the dial indicators of the mechanical register. This permits and observer to view the dial indicators of the mechanical register, or the display of an electronic register, by looking along a line of sight through the transparent portion of the meter cover, the ~6?~
9 51,831 openings in the support plates and the indicia portion of the faceplate on the mechanical reyister. Of course, it should be understood that, in many cases, the entire cover is transparent. Furthermore, in some applications it is beneficial to use a generally transparent cover with portions of the cover being painted in order to interfere with solar heat that would normally pass throuyh the transparent cover and disadvantageously raise the tempera-ture within the electrical apparatus.
lOIt should be understood that an electrical apparatus, such as a kilowatt-hour meter, made in accor-dance with the present invention can incorporate electronic components that are related to many different capabilities that are provided by auxiliary equipment added to the existing apparatus. The electronic components which are supported by the support plates of the present invention can provide demand metering capabilities, time of use metering, electronic registering capabilities, load control of external devices or any additional equipment that is used to upgrade existing electrical devices.
BRI~F DESCRIPTION OF THE DRAWING
The present invention will be more fully under-; stood for reading of the description of the preferred embodiment in conjunction with the drawing, in which:
25Figure l illustrates a typical conventional kilowatt hour meter;
Figure 2 lllustrates a base ring of the present invention;
Figure 3 is a sectional view of the base ring of Figure 2;
Figure 4A shows a base ring of the present invention in comparison to the base portion of a conven~
tional kilowatt-hour meter;
Figure 4B is similar to Figure 4A, but also illustrates a gasket disposed between the base ring of the present invention and the meter base;
. i ~l~6~
10 51,831 Figure 5 shows a latching device used in cooperation with the base ring of the present invention in order to secure it to a conventional kilowatt-hour meter base structure;
Figure 6 illustrates the support structure of the present invention;
Figure 7 shows the present invention used in conjunction with a kilowatt-hour meter in order to provide support for auxiliary components for the meter; and Figure 8 illustrates a support p]ate of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Throughout the description of the preferred embodiment, like reference numerals will be used to de-scribe like components in all of the Figures. The pre-ferred embodiment of the present invention will be described in terms of its use with the kilowatt hour meter.
However, it should be clearly understood that the present invention is not so limited. Alternative embodiments of the present invention can be utilized in conjunction with load management terminals, metering and control transpon-ders or other types of electrical equipment used by elec-tric utilities.
Figure 1 shows an exemplar~ kilowatt-hour meter 10 of the type that is generally known to those skilled in the art. The meter 10 comprises a base portion 12 and a cover 14. The cover 14 is generally made of a tra,nsparent material, such as ylass or plastic. The cover 14 is provided with a rim 16 around its open end -that is shape to be received in locking relation with the base 12.
The base portion 12 of the kilowatt-hour meter has two pairs of blades, 20 and 22, extending from it.
These pairs of blades, 20 and 22, are shaped to be received by an electrical receptacle that is connected in electrical comrnunication with the circuit for which electrical energy consumption is being measured. It should be understood that two pairs of blades (four blades) extend from the base ~6;2~3~
11 51,831 12 although all four blades are not visible in Figure 1. A
portion of the base 12 is extended outward as lugs, 24 and 26, for the purpose of protecting the blades and aiding in alignment when the meter 10 is inserted into a receptacle.
of course, it should be understood that the present inven-tion is not limited to use with pluggable meters. The present invention could alternatively be utilized with integral or surface mounted apparatus.
The kilowatt-hour meter 10 is provided with a frame 30 that is rigidLy attached to its base 12. The frame 30 is a metallic structure that provides suficien-t strength and rigidity to support the operative components of the kilowatt-hour meter lO. The frame 30 is generally made of a nonmagnetic die-cast material, such as al.uminum, and provides support for the various moving and stationary parts of the kilowatt-hour meter 10. U.S. Patent No.
3,309,152 which issued to Ramsey et al. on March 14, 1964 discloses a type of kilowatt-hour meter lO and is hereby incorporated by reference. Since kilowatt-hour meters are known to those skilled in the art, the specific functions and interrelationships of the various components illus-trated in Figure 1 will not be described in detail.
~When used to measure the electrical energy '. consumed by an electrical circuit, AC electric energy is supplied to the kilowatt hour meter 10 via terminal blade pairs 20 and 22. The AC electrical energy is directed to an electromagnet unit (not shown in Figure 1) as described in the above-mentioned U.S. Patent No. 3,309,152. The electromagnet unit includes a voltage section having a voltage winding carried by an E-shaped laminated core and a current section including a pair of current coils carried by a C-shaped laminated core. The voltage and current sections direct ~C driving magnetic fluxes across an air gap of the electromagnet unit and through a rotatable electroconductive disk 32. The disk 32 is carried on a vertical shaft 34. The shaft 34 is supported at its upper end by an upper bearing support 36 and at its lower end by ~2~ 3~
12 51,831 a lower bearing support 38. The upper bearing support 36 and the lower bearing support 38 are supported by the frame 30. These portions of the kilowatt-hour meter 10 are described in U.S. Patent ~lo. 3,143,704 which issued to Wright on August 4, 1964; U.S. Patent No. 3,413,550 which issued to Wright on November 26, 1968; U.S. Patent No.
3,693,086 which issued to Redecker et al. on September 19, 1972 and U.S. Patent No. 3,810,683 which issued to Zisa et al. on May 14, 197~.
A driving torque is produced in the disk 32 by an interaction of eddy currents with the driving magnetic fluxes inducing the eddy currents. This phenomenon is well understood by those skilled in the art of kilowatt-hour meters. A dial register 40 is operatively connected to the shaft 34 by a series of gears and shafts (not illustrated in Figure 1). Dial indicators on the front face 42 of the dial register 40 rotate in response to the rotation of the disk 32. The dial indicators are disposed on shafts that extend through the front face ~2 of the register 40. The rotation of these dial indicators (not shown in Figure 1), in cooperation with indicia disposed on the front face 42, permit an observer to view the meter reading through the front surface 46 of the cover 14.
,~ The kilowatt hour meter 10 is also generally provided with a nameplate 47 which is used to indicate the meter's configuration or style along with its part number.
The nameplate 47 in Figure 1 is illustrated as a generally ',~ flat plate. However, it should be understood that, depend-ing on the si~e and shape of various other components of the kilowatt hour meter lO, other nameplate shapes could be uti]ized.
The purpose of the present invention is to permit a kilowatt-hour meter, such as the meter 10, to be easily upgraded by the addition of auxiliary electronic components without adversely affecting the operation of the conven-j tional meter or requiring significant changes to its existing components.
..
~26~
13 51,831 The present invention comprises a base ring 50 asillustrated in Fiyure 2. The base ring 50 provides a means for attaching the support structure of the present inven-tion to the base portion 12 of a conventional kilowatt-hour meter. In a preferred embodiment of the present inven-tion, the base ring 50 is made of a nonmetallic material, such as plastic and is generally circular with a central axis of symmetry CAS that is perpendicular to the illustration of Figure 2. It has a central raised portion 52 and a plural-ity of holes 54. It should be understood that, althoughthe base ring 50 is illustrated in Figure 2 and described herein as having a central axis of symmetry CAS the posi-tions of the holes 54 are not necessarily disposed about the ring in the manner that would position them symmetrical about the ring's center, or equally spaced. The arcuate spacing of the holes 5~ is chosen to accommodate the locations of various portions of the meter base and frame with which the latches, which will be described in detail below, can cooperate to fasten the base ring 50 to the kilowatt hour meter. The raised portion 52, in a preferred embodiment of the present invention, serves two purposes.
First, it provides added strength to the base ring 50.
Second, as will be described in greater detail below, it provides a ridge with which a portion of the latches can cooperate to restrict potential loosening of the latches after installation. The holes 54 provide a means for attaching a plurality of posts, which will be disc~ssed in greater detail below, to the base ring 50 and also provide a means for attaching a plurality of latches, which will be discussed in detail below, to the base ring 50 for the purpose of rigidly attaching the support structure of the present invention to the frame 30 and base portion 12 of a conventional kilowatt-hour meter.
In Figure 2, three radii are illustrated. These radii, Rl, R2 and R3, will be used throughout the discus-sion below to more clearly rPlate the dimensional relation-~62~3~
14 51,831 ship be-tween the components of the present invention and tha base portion 12 of a kilowatt-hour meter.
Figure 3 illustrates a cross sectional view of the base ring 50 of Figure 2. Figure 3 shows the outside radial dimension R3, the inside radial dimension R2 and the inside radial dimension Rl of the raised portion 52 of the base ring 50. Also shown in Figure 3, is a ridge 55 that extends from the base ring 50 in an opposite direction from the raised portion 52. When the base ring 50 is associated with the base portion 12 of a kilowatt-hour meter, the ridge 55 is received between two circular raised portions of the meter base. The inside radial dimension of the ridge 55 is illustrated by arrow R4. The preferred embodi-ment of the present invention is illustrated and described herein as being associated with a kilowatt hour meter whose base is provided with the two circular raised portions discussed above. It should be clearly understood that some meter bases and the bases for load management terminals and metering and control transponders do not incorporate these circular raised portions. The precise cross sectional shape of the base ring 50 in a preferred embodiment of the present invention is chosen to take advantage of the existence o~ these circular raised portions. However, i~
these circular raised portions are not available on the electrical apparatus with which the present invention is used, alternative types of base portions can be provided that are shaped to be received in such a way so as to prevent relative motion between the base of the electrical apparatus and the base portion of the present invention.
Figure 4A illustrates the relationship between the base ring 50 of the present invention and the base portion 12 of a conventional kilowatt-hour meter. The base portion 12 of the meter is shown with its blade 22 and lug 26 extending from it. The base portion 12 of the meter has two circular raised portions, 56 and 58, that combine to define a circular groove 60. The ridge 55 of the base ring 50 is shaped to be received into the groove 60 of the base ~2~
51,831 portion 12. When the ridge 55 is disposed in the yroove 60, the movement of the base ring 50 is limited in all directions except in a circular direction about its central axis of symmetry and in a direction directly away from the base 12. It should be understood that, although the preferred embodiment of the present invention is described in terms of a ridge 55 that is shaped to be received in a groove 60, other shapes of the base 12 and base ring 50 could alternatively be used to permit these components to be ali~ned in a motion restricting relation.
Figure 4B is similar to Fi~ure 4A, but also illustrates the presence of a gasket 61 disposed between the circular rings, 56 and 58, and the ridge 55 of -the base ring 50. It should be understood that the gasket 61 is not a requirement of the present invention. Rather, the gasket 61 is a normal inclusion between the base 12 and the cover 14 of a typical kilowatt-hour meter.
Figure 5 illustrates a latch 62 of the present invention. The latch 62 is provided with a rod shaped ; 20 portion 64 that is shaped to be received by one of the plurality of holes 54 of the base ring 50. When inserted into a hole o* the base ring, the latch 62 has an axis of rotation AR as shown. The latch 62 has a platform portion 66 from which a protrusion 68 extends. Although only one protrusion 68 is shown extending from the upper surface of the platform portion 66, it should be understood that a similar protrusion extends downward from the lower surface of the platform portion 66. The latch 62 is also provided with a handle, or stop 69. When the latch 62 is rotated about its axis of rotation AR, the lower protrusion 68 passes over the ridge 52 of the base ring 50 and prevents the latch 62 from rotating in a reverse, or unlatching, direction. The raised body 120, when the latch 62 is rotated radially inward, provides the latch portion of the 35 latch 62. In other words, the raised body 120 protrudes into the space between the frame 30 and the base 12. The edge of platform 66 abuts agains~ a component of the meter 16 51,~31 in such a way so as to prevent rotation of the base ring 50 about its central axis of symmetry CAS. Since this type of abutment can prevent rotation in one anyular direction, two or more latches 62 are normally used to assure that no rotation of the base ring 50 can occur. The stop 69, in a preferred e~bodiment of the present invention, abuts against the raised portion 52 of the base ring 50 and, in some cases, against the frame 30 of the meter. Therefore, the stop 69 prevents the latch 62 from rotating about its axis of rotation A~ to an excessive amount. The stop 69 of the present invention thus positions the platform portion 66 in a proper attitude for abutment ayainst a portion of the meter structure under the frame 30. The stop 69 also serves a useful purpose in providing a means for mamlally manipulating the latch 62. It facilitates finger manipula-tion of the latch 62 about its axis of rotation AR and provides a surface against which manual pressure can be applied during the latching procedure.
Fiyure 6 illustrates the support structure of the present invention. The base ring 50 is shown with a latch 62 connected to it. Two posts, 70 and 72, are shown extending from the hase ring 50. Although only two posts, and 7~, are illustrated ln Figure 6, it should be clearly understood that, more than two posts can be uti-lized. In a t~pical application of -the present invention, ; three posts would probably be incorporated in order to provide a three point mounting between the base ring 50 and the various support plates attached to the posts. Depend-ing on ri~idity re~uirements, various numbers of posts can be employed. One end of each of these posts is connected to the base ring 50 and the posts, 70 and 72, extend from the base ring 50 in a direction that is generally parallel to the central axis of symmetry of the base ring 50. In a preferred embodiment of the present invention, the posts, 70 and 72, are made of a hexagonal rod with each end being drilled and tapped to receive a screw. As can be seen in Figure 6, post 70 is slightly shorter than post 72. This ,?~
17 51,831 ;characteristic of the posts is not a requirement of the present invention. Rather, the exact dimensions of the post are a function of the particular application in which the present invention is used. The posts, 70 and 72, are attached to the base ring 50 by screws 74 which extend throu~h holes i~ the base ring S0 and into the posts.
Attached to the posts, 70 and 72, is a support plate 80. The support plate 80 extends in a direction which is generally perpendicular to the central axis of ;10 symmetry of the base ring 50. The primary function of the support plate 80 is to provide a means for mounting auxil-iary electronic components for the purpose of expandin~ tha capabilities of the kilowatt-hour meter with which the support structure of Figure 6 is used. Although support plate 80 is illustrated .in Figure 6 as bein~ a simple flat plate, it should be understood that in a typical applica-tion of the present invention, this plate would most likely be a printed circuit board. It should further be under-stood, however, that the precise types of components used as support plates with the present invention can vary significantly. They can comprise circuit boards, metallic support plates or other types of structures that are designed to fulfill a specific function required by the auxiliary equipment that is beiny added to the existing electrical apparatus.
In applications where the support plate 80 is a printed circuit board, such as a power amplifier circuit board, a heat sink 81 would generally be attached to it.
In this particular type of application of the present invention, the component illustrated by reference numeral 82 would be a lo~ic circuit board that is held to the powered amplifier circuit board 80 via a plurality of plastic snap-in fasteners 83. In one particular embodiment of the present invention, support plate 84 is metallic and contains printed information relative to the specific functions, style and part numbers of the electronic subas-sembly. The plate indicated by reference numeral 86 would :
~2~
18 51,831 contain prlnted information regardiny the style and part numbers of the meter with which the present invention is associa-ted in a particular application.
Other support plates 82 and 84 are also illus-trated in Figure 6. It should be understood that theprecise configuration and association of these support plates, 80, 82 and 84, can vary significantly based on the particular application of the present invention.
The present invention will be more fully under-stood by comparing the conventional meter of Figure 1 tothe meter of Figure 7 which includes the present invention.
Figure 7 illustrates a conventional kilowatt-hour meter that has been upgraded by the addition of the present invention. Prior to the addition of the present invention, the kilowatt-hour meter 100, illustrated in Figure 7, comprised the basic elements of the kilowatt-hour meter 10 of Figure 1. More specifically, prior to being upgraded, the kilowatt-hour meter of Figure 7 comprises the base 12, the frame 30, the rotatable disk 32 and its shaft 34, the register 40 with its faceplate 42 and the related compo-nents which are illustrated in both Figures 1 and 7. In order to upgrade the kilowatt-hour meter 10 to the improved kilowatt-hour meter lOO, a base ring 50 with its associated posts, 70 and 72, and its plurality of support plates, is connected to the base 12 of the kilowatt-hour meter ~y aligning the ridge (reference numeral 54 in Figure 4) with the slot (reference numeral 60 in Figure 4) and rotating a plurality of latches (reference numeral 62 in Figures 5, 6 and 7) in such a way that the raised body (reference numeral 120 in Figure 5) exerts a force against the frame in a direction away from the base 12. This force results in an equal opposing force which pushes the base ring 50 against the base portion 12 of the meter. This action o the latches 62 effectively attaches the present invention to the base 12 and, as discussed above, the latches 62 also prevent rotation of -the base ring 50 about its central axis of symmetry. The posts, 70 and 72, extend ~L2~33~
19 51,~31 in a direction away from the base 12 as shown in Fiyure 7.
A plurality of support plates, 80, ~2, 90, 92 and 95 are attached to the posts in such a way that they are disposed in a direction which is generally perpendicular to the central axis of symmetry of the base ring 50. The plurali-ty of support plates provide support for additional elec-tronic components and circuitry that are used in updating the capabilities o~ the subject kilowatt-hour meter.
When the present invention is used to upgrade existing electrical equipment, various types of electronic components can be added to the kilowatt-hour meter. For example, a kilowatt-hour meter can be upgraded to include time of use metering, rolling demand metering, LED rate indication, load survey devices or operational relay coils along with many other alternative components.
Also shown in Figure 7 is an electronic display 94 with its bezel 96. The inclusion of an electronic display 94 is another one of the optional capabilities provided by the support structure of the present invention.
However, it should be understood that the specific elec-tronic components added to the meter and supported by the present invention do not, b~ themselves, relate directly to the requirements of the present invention. The primary purpose of the support structure of the present invention is to provide a means for supporting various kinds of auxiliary electronic components to an existing kilowatt-hour meter.
In a preferred embodiment of the present inven-tion, the support plates are provided with an opening therethrough to enable an observer to visually observe the front plate 42 of the register 40. Even though an addi-tional electronic register 94 is shown attached to the present invention in Figure 7, it should be understood that in certain circumstances, it is desirable to also provide the capability of viewing the existing mechanical register 40. In order to provide this capability, openings must be provided in all of the support plates t~at lie between the 51,831 front surface 93 of the cover 91 and the indicia portion of the front plate 42 of the reyis~er 40. This capability will be discussed in greater detail below in relation to the frontmost support pla-te 92. Of course, it should be understood that in applications that do not include exist-ing registers that are visually readable, openings in the support plates of the present invention are not required.
This particular feature is merely provided in order to allow an operator to visually observe a register by looking through the openings of the present invention and this , feature is only provided when it is necessary.
By comparing Eigures l and 7, it should be apparent that an elongated cover 91 replaces the existing cover 14 of the kilowatt-hour meter. An elon~ated cover is a requirement when the support plates and posts of the present invention extend away from the base portion 12 by a dimenslon greater than the original cover 14 would other-~ wise permit.
`~ Figure 8 illustrates a frontal view of the front most support plate 92. As can be seen in Figure 8, this support plate 92 has an opening 108 ~hrough which the fxont plate 42 and its dial indicators can be observed through the ront surface 93 of the cover ~1. Screws 104 and 105 connect the support plate 92 to the posts and spacers which provide rigid attachment of the support plate 92 to theother components of the present invention. The plate 86 is detachahle rom the support plate 92 and is held i,n place by screws, 102 and 103. The plate 86 is not an absolute requirement of the present invention, but permits descrip-tive indicia to be added to the front portion of support plate 92. Typical information that could be contained on the front surface of plate 86 include the class, voltage, serial number, style number and other related information that is descriptive of the updated kilowatt-hour meter 100.
Viewing Fi~ures 7 and 8 together, it should be apparent that each of the support plates illustrated between the register 40 and the front surface 93 of the ,, ' 3~"
21 51,~31 cover 91 also have an opening throuyh them. These openings are generally similar in shape to opening 108 and are aligned in such a way so as to permit an observer to vlew the front plate 42 of the register 40 through the front surface 93 of the meter cover.
The advantages of the present invention can be seen in the i~llustration of Fi~ure 7. The present inven-tion, with all of its added electronic components, can be manufactured as a separate subassembly prior to delivering it to an existing kilowatt-hour meter in the field.
However, it should be clearly understood that a more typical application of the present invention is the upgrad-ing of kilowatt-hour meters during original manufacturing.
For example, if a manufacturer produces a basic kilowatt-hour meter and also offers a more sophisticated kilowatt-hour meter that employs additional electronic components, the more sophisticated units can be manufac-tured by utilizing the basic kilowatt-hour meter along with the present invention. This permits the manufacturer to avoid the necessity o producing and storing two different styles of kilowatt-hour meters. Instead, the basic kilowatt-hour meter can be manufactured in sufficient quantities for use as both the basic kilowatt-hour meter and a portion of the more sophisticated kilowatt-hour meter that would be combined with the present invention in order to provide the additional electronic components that are necessary in the more sophisticated meter. Therefore, it should be understood that the present invention can be used by meter manufacturers in order to simplify the upgradin~
of kilowatt-hour meters during original manufacture or, alternatively, can be used to upgrade existing meters that are already installed at consumers' residences. The additional electronic components would be mounted on the present invention for later attachment to kilowatt-hour meters. Electrical connections can easily be provided by flexible ribbon cable (not illustrated in Figure 7) which would be precisely shaped to conform to the specific 22 51,831 electronic components that are attached to the support plates of the present invention.
Installation of the present invention will be more fully understood by comparing Figures 1 and 7. In order to convert the kilowatt-hour meter 10 of Figure 1 to the upgraded kilowatt-hour meter 100 of Figure 7, the cover : 14 would be removed from the base portion 12. Then, support structure of the present inventlon (as illustrated in Figure 6), with all auxiliary electronic equipment attached to its suppo~t plates, would be positioned over the existing components of the kilowatt-hour meter 10 and its base ring 50 would then be placed against the base portion 12 with its ridge (reference numeral 54 in Figure 4) inserted into the groove (reference numeral 60 of Figure 4) of the base portion 12. Prior to latching the present invention to the existing meter base and frame 30, it can be rotated about its central axis of symmetry in order to properly align the auxiliary components attached to it with the existing components of the original kilowatt-hour meter 10. After being thus aligned, the latches 62 can be rotated by hand to rigidly attach the base ring 50 between the base portion 12 of the kilowatt-hour meter and its ~ frame 30 and prevent rotation of the base ring 50. By : rotating the latches 62, the base ring 50 and its associat-~,; 25 ed posts and support plates are fixedly attached to the base portion 12 of the kilowatt-hour meter. After making the necessary electrical connections, the elongated cover 91 is connected in locking relation with the base portion 12. Other than its elongated shape, the cover 91 is similar to the cover 14 and to the many covers known to those skilled in the art for use with kilowatt-hour meters.
In fact, the elongated cover 91 can usually be the cover that is typically used on polyphase meters. The cover and rim are generally a single assembly.
~eferrin~ again to Figure 7, it can be seen that the base ring 50 and the posts, 70 and 72, are arranged radially around the central axis of symmetry of the support ~2~ 3~1, 23 51,831 ring 50 in such a way so as to permit the support structure of the present invention to pass over -the existiny compo-nents (illustrated in Fiyure 1) without interfering with them. The posts, 70 and 72, support the plurality of support plates away from the existing components and enable the present invention to provide auxiliary equipment for use with the existing kilowatt-hour meter without adversely affecting its operation.
The present invention permits existiny kilowatt-hour meters to be upgraded by adding auxiliary electronic equipment. The auxiliary equipment can be manufactured as a single unit, along with the support structure of the present invention, and delivered to the field installation for upgradiny the meter. Flexible ribbon connectors can be used to provide necessary electri-cal connections between old components and auxiliary components and the openings throuyh the support plates of the present invention avoid obstruc-tion of view between the front surface of the meter cover and the original register.
Although the preferred embodiment of the present invention has been described in considerable detail and with particular ~xemplary structures, it should not be considered to be so limited. Alternative combinations of support plates and posts along with a modified support ring should be considered to be within the scope of the present invention.
Besides kilowatt-hour me-ters, many other types of electrical equipment are used by electrical utilities. For example, load mana~ement terminals can be located at a consumer's residence for the purpose of load shedding during periods of peak demand. In a typical system of this type, the electric utility would send modulated signals to particular load management terminals that command the terminals to shed specific non-essential loads at the customer's residence. Some load management terminals only ha~e the ability to receive signals which are transmitted on the power line and to respond to commands received in this manner from a central location. Other load management terminals also have the capability of both transmitting and receiving power line communication signals. This capabili-ty permits the load management terminal to not only respond to commands received from a central utility location, but also to transmit data from the consumer's residence to a central location. This data would typically comprise meter reading data or other status-related signals.
Many recent developments in the field o~ electri-cal measurement and powerline communications in recent years relate to the increased use o~ electronic circuitry within the ~ilowatt-hour meter. The use of solid state components and microprocessors within electric equipment, such as meters or load management terminals, is rapidly becoming common place. The use of microprocessors, or microcomputers, within these types of electrical equipment vastly increases its capabilities and expands the type of information that it can provide to both the electric 4 51,~31 utility and the consumer. For example, in order to display the many types of numeric information that can be provided by a ~ilowatt-hour meter, electronic reyisters have been developed. These electronic registers display data on an alphameric panel which is able to sequentially display a plurality of values, whereas a mechanical register requires a single dial indicator and associated shaft for every digit of a measured quantity.
Microprocessors permit electrical equipment, which is located at a consumer's residence, to perform complex demodulation and modulation of powerline communication signals, accurately read the meter and perform load shed-ding operations.
When an electric utility desires to upgrade its metering or load control capability, it faces a potentially expensive procedure. For each conventional kilowatt~hour meter that is replaced by a more sophisticated meter, the utility must not only consider the additional cost for the more technologicaLly advanced meter, but also the potential loss due to their increased inventory of the unused meters.
When a conventional watt-hour meter is replaced by a more sophisticated meter, some of the capabilities of the simpler meter are necessarily reproduced in the new meter.
This represents an unnecessary expense because a portion of the cost for the new meter relates to replacement of components that were part of the replaced meter.
Therefore, when an electric utility replaces an existing electrical apparatus with a more complicated and technologically advanced device, a portion of the incurred expense represents the replacement of existing components with redundant components in the new device. It would therefore be economically advantageous if an existing apparatus, such as a watt-hour meter, could be upgraded without the need to replace its existing components that would also be required in the new meter. For example, if a meter could be upgraded by merely adding auxiliary equip-ment, significant savings could be realized.
S 51,8~1 The present invention will be described in terms of its particular application to a kilowatt hour meter.
However, it should be understood that alternative embodi-ments o the present invention could also be used to provide a means for attaching and supportiny auxiliary components to existing electrical apparatus. The support structure of the present invention could be used, for example, in association with kilowatt hour meters, load management terminals, metering and control transponders, and many other types of wall-mounted electrical apparatus that is commonly used by electrical utility companies.
Furthermore, although a particular embodiment of the present invention utilizes a ring-shaped base as its means for attaching the support structure to the base of the electrical apparatus, it should be understood that various other shapes of the attachment means can be used. Also, the ring-shaped base o the support structure is described as being attachable to the base by means of a plurality of latches. It should be understood that many alternative attaching means, such as screws, are also within the scope of the present invention. For convenience, the present invention is described herein in terms of a particular embodiment that is applicable for use i.n association with kilowatt hour meters.
The present invention relates to an apparatus for upgrading existing electrical apparatus, such as meters, with auxiliary electronic equipment. It comprises a support structure that has an attachment means, such as a base ring, shaped to fit into the base of the electrical apparatus in rotatable association therewi-th. Many exist-ing meter bases have a pair of molded rings in their bases.
These rings, or functionally similar configurations, cooperate with a gasket in order to provide an effective seal between the cover and the base of a kilowatt-hour meter. When applied in association with a kilowatt hour meter that has a base with molded rings, the base ring of the present invention is shaped to fit with the molded 3~i 6 51,831 rings ln such a way so as to prevent relative motion in all directions except in the direction of rotation about the central axis of symmetry of both the hase ring and the molded rings of the meter's base.
The base ring of the preserlt invention is provid-ed with a plurality of latches that are rotatably connected to it. Each of the latches, when rotated about their individual centers of rotation, move their latch portions radially inward in such a way so as to abut a portion of the meter structure. When the latches are rotated about their individual axes of rotation, they prevent the base ring from rotating about its central axis of symmetry because they abut components of the meter base structure.
They also are engaged bPtween the base ring and a frame portion of the meter structure. Therefore, the base ring is attached to the meter base in such a way so as to prevent its rotation about its central axis symmetry and its movement in a direction away from the meter base. It should be understood that, although these latches provide a convenient way of attaching the support structure of the present invention to the apparatus, alternative methods of attachment are also possible. For example, the base ring could be screwed or bolted to the meter base.
The base ring of the present invention is provid-ed with a plurality of posts that are attached to it and extend in a direction away from the meter's base. Each of the posts has one of its ends attached to the base ring and extends in a direction which is generally parallel to the central axis of symmetry of the base ring. These posts are used to support one or more support plates. Each mounting plate is attached to the posts in such a way so as to hold the mounting plate in a configuration which is generally perpendicular to the central axis of symmetry of the base ring. The primary function of the posts is to support the support plates at a position which extends beyond the original components of the meter. This enables additional electrical devices to be attached to the support plates in ~:6~
7 51,831 a position which does not interfere with the components of the original meter. It should be understood that the support plates would normally comprise a combination of plates, brackets and circuit boards.
The support plates of the present invention can be provided with an opening that is yenerally aligned with the indicia portion of the register's front plate when the present invention is attached to a meter. The dial indica-tors of the register and the opening in the support plates are aligned along a line that is generally parallel to the central axis of symmetry of the base ring. Since the mechanical register of a typical kilowatt-hour meter is generally disposed in a configuration that is readily visible in a direction perpendicular to the base of the meter, the openings in the support plates o the present invention permit visual observation of the dial indicators through the support plate structure. Of course, it should be understood that the openings in the support plates are not required if no visual register is to be disposed behind them. In applications of the present invention that relate to load management terminals, transponders or other elec-trical apparatus which does not utilize a manually readable register, the support plates of the present invention can be incorporated without the use of these openings.
Besides supporting a plurality of electronic devices, the support plates of the present invention are also able to provide support for an additional el,ectronic régister that can be added, as auxiliary equipment, to an existing kilowatt-hour meter. When an electronic register is used in accordance with the present invention, a pulse initiator is attached to the frame of the existing meter and a flexible conductor is used to provide electrical communications between the pulse initiator and the elec-tronic register. Of course, it should be understood that the present invention is applicable with many different types of electrical apparatus. In some applications, the pulse inltiator may be mounted on a remote meter and the 33~
8 51,~31 signals from the pulse initiator are communicated to the electrical apparatus comprising the present inven-tion along signal wlres. This would be a typical application in situations where the present invention is used in conjunc-tion with load management terminals, either pluggable orsurface mounted, which do not contain their own meters.
Various types of pulse initiators are known to those skilled in the art. A photoelectric pulse initiator is disclosed in U.S. Patent No. 4,047,024, which issued to 10 Henderson on September 6, 1977. A direction sensitive opto-elec-tronic pulse initiator for electrical meters is disclosed in U.S. Patent No. 4,034,292, which issued to McClelland on July 5, 1977 and a direct input photoelectric pulse initiator for meter telemetry and recording systems 15 is disclosed in U.S. Patent No. 3,943,498, which issued to McClelland et al. on March 9, 1976. Furthermore, flexible conductors are used to provide electrical communlcation between the existing portions of the original meter and the additional electronic components attached to the support ; 20 plates.
The radial and longitudinal dimensions o the suppoxt structure of the present invention permit a cover to fit over the support structure and be attached to the base of the meter. Although the cover of the present invention is generally larger, in a longitudinal direction, than the original cover used by the existing watt-hour meter, its radial dimensions remain generally the same.
The increased longitudinal dimension of the meter cover is related to the additional electronic equipment supported by the support plates and posts of the present invention. The cover generally has a transparent portion disposed in alignment with the opening of the support plates and the indicia that are associated with the dial indicators of the mechanical register. This permits and observer to view the dial indicators of the mechanical register, or the display of an electronic register, by looking along a line of sight through the transparent portion of the meter cover, the ~6?~
9 51,831 openings in the support plates and the indicia portion of the faceplate on the mechanical reyister. Of course, it should be understood that, in many cases, the entire cover is transparent. Furthermore, in some applications it is beneficial to use a generally transparent cover with portions of the cover being painted in order to interfere with solar heat that would normally pass throuyh the transparent cover and disadvantageously raise the tempera-ture within the electrical apparatus.
lOIt should be understood that an electrical apparatus, such as a kilowatt-hour meter, made in accor-dance with the present invention can incorporate electronic components that are related to many different capabilities that are provided by auxiliary equipment added to the existing apparatus. The electronic components which are supported by the support plates of the present invention can provide demand metering capabilities, time of use metering, electronic registering capabilities, load control of external devices or any additional equipment that is used to upgrade existing electrical devices.
BRI~F DESCRIPTION OF THE DRAWING
The present invention will be more fully under-; stood for reading of the description of the preferred embodiment in conjunction with the drawing, in which:
25Figure l illustrates a typical conventional kilowatt hour meter;
Figure 2 lllustrates a base ring of the present invention;
Figure 3 is a sectional view of the base ring of Figure 2;
Figure 4A shows a base ring of the present invention in comparison to the base portion of a conven~
tional kilowatt-hour meter;
Figure 4B is similar to Figure 4A, but also illustrates a gasket disposed between the base ring of the present invention and the meter base;
. i ~l~6~
10 51,831 Figure 5 shows a latching device used in cooperation with the base ring of the present invention in order to secure it to a conventional kilowatt-hour meter base structure;
Figure 6 illustrates the support structure of the present invention;
Figure 7 shows the present invention used in conjunction with a kilowatt-hour meter in order to provide support for auxiliary components for the meter; and Figure 8 illustrates a support p]ate of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Throughout the description of the preferred embodiment, like reference numerals will be used to de-scribe like components in all of the Figures. The pre-ferred embodiment of the present invention will be described in terms of its use with the kilowatt hour meter.
However, it should be clearly understood that the present invention is not so limited. Alternative embodiments of the present invention can be utilized in conjunction with load management terminals, metering and control transpon-ders or other types of electrical equipment used by elec-tric utilities.
Figure 1 shows an exemplar~ kilowatt-hour meter 10 of the type that is generally known to those skilled in the art. The meter 10 comprises a base portion 12 and a cover 14. The cover 14 is generally made of a tra,nsparent material, such as ylass or plastic. The cover 14 is provided with a rim 16 around its open end -that is shape to be received in locking relation with the base 12.
The base portion 12 of the kilowatt-hour meter has two pairs of blades, 20 and 22, extending from it.
These pairs of blades, 20 and 22, are shaped to be received by an electrical receptacle that is connected in electrical comrnunication with the circuit for which electrical energy consumption is being measured. It should be understood that two pairs of blades (four blades) extend from the base ~6;2~3~
11 51,831 12 although all four blades are not visible in Figure 1. A
portion of the base 12 is extended outward as lugs, 24 and 26, for the purpose of protecting the blades and aiding in alignment when the meter 10 is inserted into a receptacle.
of course, it should be understood that the present inven-tion is not limited to use with pluggable meters. The present invention could alternatively be utilized with integral or surface mounted apparatus.
The kilowatt-hour meter 10 is provided with a frame 30 that is rigidLy attached to its base 12. The frame 30 is a metallic structure that provides suficien-t strength and rigidity to support the operative components of the kilowatt-hour meter lO. The frame 30 is generally made of a nonmagnetic die-cast material, such as al.uminum, and provides support for the various moving and stationary parts of the kilowatt-hour meter 10. U.S. Patent No.
3,309,152 which issued to Ramsey et al. on March 14, 1964 discloses a type of kilowatt-hour meter lO and is hereby incorporated by reference. Since kilowatt-hour meters are known to those skilled in the art, the specific functions and interrelationships of the various components illus-trated in Figure 1 will not be described in detail.
~When used to measure the electrical energy '. consumed by an electrical circuit, AC electric energy is supplied to the kilowatt hour meter 10 via terminal blade pairs 20 and 22. The AC electrical energy is directed to an electromagnet unit (not shown in Figure 1) as described in the above-mentioned U.S. Patent No. 3,309,152. The electromagnet unit includes a voltage section having a voltage winding carried by an E-shaped laminated core and a current section including a pair of current coils carried by a C-shaped laminated core. The voltage and current sections direct ~C driving magnetic fluxes across an air gap of the electromagnet unit and through a rotatable electroconductive disk 32. The disk 32 is carried on a vertical shaft 34. The shaft 34 is supported at its upper end by an upper bearing support 36 and at its lower end by ~2~ 3~
12 51,831 a lower bearing support 38. The upper bearing support 36 and the lower bearing support 38 are supported by the frame 30. These portions of the kilowatt-hour meter 10 are described in U.S. Patent ~lo. 3,143,704 which issued to Wright on August 4, 1964; U.S. Patent No. 3,413,550 which issued to Wright on November 26, 1968; U.S. Patent No.
3,693,086 which issued to Redecker et al. on September 19, 1972 and U.S. Patent No. 3,810,683 which issued to Zisa et al. on May 14, 197~.
A driving torque is produced in the disk 32 by an interaction of eddy currents with the driving magnetic fluxes inducing the eddy currents. This phenomenon is well understood by those skilled in the art of kilowatt-hour meters. A dial register 40 is operatively connected to the shaft 34 by a series of gears and shafts (not illustrated in Figure 1). Dial indicators on the front face 42 of the dial register 40 rotate in response to the rotation of the disk 32. The dial indicators are disposed on shafts that extend through the front face ~2 of the register 40. The rotation of these dial indicators (not shown in Figure 1), in cooperation with indicia disposed on the front face 42, permit an observer to view the meter reading through the front surface 46 of the cover 14.
,~ The kilowatt hour meter 10 is also generally provided with a nameplate 47 which is used to indicate the meter's configuration or style along with its part number.
The nameplate 47 in Figure 1 is illustrated as a generally ',~ flat plate. However, it should be understood that, depend-ing on the si~e and shape of various other components of the kilowatt hour meter lO, other nameplate shapes could be uti]ized.
The purpose of the present invention is to permit a kilowatt-hour meter, such as the meter 10, to be easily upgraded by the addition of auxiliary electronic components without adversely affecting the operation of the conven-j tional meter or requiring significant changes to its existing components.
..
~26~
13 51,831 The present invention comprises a base ring 50 asillustrated in Fiyure 2. The base ring 50 provides a means for attaching the support structure of the present inven-tion to the base portion 12 of a conventional kilowatt-hour meter. In a preferred embodiment of the present inven-tion, the base ring 50 is made of a nonmetallic material, such as plastic and is generally circular with a central axis of symmetry CAS that is perpendicular to the illustration of Figure 2. It has a central raised portion 52 and a plural-ity of holes 54. It should be understood that, althoughthe base ring 50 is illustrated in Figure 2 and described herein as having a central axis of symmetry CAS the posi-tions of the holes 54 are not necessarily disposed about the ring in the manner that would position them symmetrical about the ring's center, or equally spaced. The arcuate spacing of the holes 5~ is chosen to accommodate the locations of various portions of the meter base and frame with which the latches, which will be described in detail below, can cooperate to fasten the base ring 50 to the kilowatt hour meter. The raised portion 52, in a preferred embodiment of the present invention, serves two purposes.
First, it provides added strength to the base ring 50.
Second, as will be described in greater detail below, it provides a ridge with which a portion of the latches can cooperate to restrict potential loosening of the latches after installation. The holes 54 provide a means for attaching a plurality of posts, which will be disc~ssed in greater detail below, to the base ring 50 and also provide a means for attaching a plurality of latches, which will be discussed in detail below, to the base ring 50 for the purpose of rigidly attaching the support structure of the present invention to the frame 30 and base portion 12 of a conventional kilowatt-hour meter.
In Figure 2, three radii are illustrated. These radii, Rl, R2 and R3, will be used throughout the discus-sion below to more clearly rPlate the dimensional relation-~62~3~
14 51,831 ship be-tween the components of the present invention and tha base portion 12 of a kilowatt-hour meter.
Figure 3 illustrates a cross sectional view of the base ring 50 of Figure 2. Figure 3 shows the outside radial dimension R3, the inside radial dimension R2 and the inside radial dimension Rl of the raised portion 52 of the base ring 50. Also shown in Figure 3, is a ridge 55 that extends from the base ring 50 in an opposite direction from the raised portion 52. When the base ring 50 is associated with the base portion 12 of a kilowatt-hour meter, the ridge 55 is received between two circular raised portions of the meter base. The inside radial dimension of the ridge 55 is illustrated by arrow R4. The preferred embodi-ment of the present invention is illustrated and described herein as being associated with a kilowatt hour meter whose base is provided with the two circular raised portions discussed above. It should be clearly understood that some meter bases and the bases for load management terminals and metering and control transponders do not incorporate these circular raised portions. The precise cross sectional shape of the base ring 50 in a preferred embodiment of the present invention is chosen to take advantage of the existence o~ these circular raised portions. However, i~
these circular raised portions are not available on the electrical apparatus with which the present invention is used, alternative types of base portions can be provided that are shaped to be received in such a way so as to prevent relative motion between the base of the electrical apparatus and the base portion of the present invention.
Figure 4A illustrates the relationship between the base ring 50 of the present invention and the base portion 12 of a conventional kilowatt-hour meter. The base portion 12 of the meter is shown with its blade 22 and lug 26 extending from it. The base portion 12 of the meter has two circular raised portions, 56 and 58, that combine to define a circular groove 60. The ridge 55 of the base ring 50 is shaped to be received into the groove 60 of the base ~2~
51,831 portion 12. When the ridge 55 is disposed in the yroove 60, the movement of the base ring 50 is limited in all directions except in a circular direction about its central axis of symmetry and in a direction directly away from the base 12. It should be understood that, although the preferred embodiment of the present invention is described in terms of a ridge 55 that is shaped to be received in a groove 60, other shapes of the base 12 and base ring 50 could alternatively be used to permit these components to be ali~ned in a motion restricting relation.
Figure 4B is similar to Fi~ure 4A, but also illustrates the presence of a gasket 61 disposed between the circular rings, 56 and 58, and the ridge 55 of -the base ring 50. It should be understood that the gasket 61 is not a requirement of the present invention. Rather, the gasket 61 is a normal inclusion between the base 12 and the cover 14 of a typical kilowatt-hour meter.
Figure 5 illustrates a latch 62 of the present invention. The latch 62 is provided with a rod shaped ; 20 portion 64 that is shaped to be received by one of the plurality of holes 54 of the base ring 50. When inserted into a hole o* the base ring, the latch 62 has an axis of rotation AR as shown. The latch 62 has a platform portion 66 from which a protrusion 68 extends. Although only one protrusion 68 is shown extending from the upper surface of the platform portion 66, it should be understood that a similar protrusion extends downward from the lower surface of the platform portion 66. The latch 62 is also provided with a handle, or stop 69. When the latch 62 is rotated about its axis of rotation AR, the lower protrusion 68 passes over the ridge 52 of the base ring 50 and prevents the latch 62 from rotating in a reverse, or unlatching, direction. The raised body 120, when the latch 62 is rotated radially inward, provides the latch portion of the 35 latch 62. In other words, the raised body 120 protrudes into the space between the frame 30 and the base 12. The edge of platform 66 abuts agains~ a component of the meter 16 51,~31 in such a way so as to prevent rotation of the base ring 50 about its central axis of symmetry CAS. Since this type of abutment can prevent rotation in one anyular direction, two or more latches 62 are normally used to assure that no rotation of the base ring 50 can occur. The stop 69, in a preferred e~bodiment of the present invention, abuts against the raised portion 52 of the base ring 50 and, in some cases, against the frame 30 of the meter. Therefore, the stop 69 prevents the latch 62 from rotating about its axis of rotation A~ to an excessive amount. The stop 69 of the present invention thus positions the platform portion 66 in a proper attitude for abutment ayainst a portion of the meter structure under the frame 30. The stop 69 also serves a useful purpose in providing a means for mamlally manipulating the latch 62. It facilitates finger manipula-tion of the latch 62 about its axis of rotation AR and provides a surface against which manual pressure can be applied during the latching procedure.
Fiyure 6 illustrates the support structure of the present invention. The base ring 50 is shown with a latch 62 connected to it. Two posts, 70 and 72, are shown extending from the hase ring 50. Although only two posts, and 7~, are illustrated ln Figure 6, it should be clearly understood that, more than two posts can be uti-lized. In a t~pical application of -the present invention, ; three posts would probably be incorporated in order to provide a three point mounting between the base ring 50 and the various support plates attached to the posts. Depend-ing on ri~idity re~uirements, various numbers of posts can be employed. One end of each of these posts is connected to the base ring 50 and the posts, 70 and 72, extend from the base ring 50 in a direction that is generally parallel to the central axis of symmetry of the base ring 50. In a preferred embodiment of the present invention, the posts, 70 and 72, are made of a hexagonal rod with each end being drilled and tapped to receive a screw. As can be seen in Figure 6, post 70 is slightly shorter than post 72. This ,?~
17 51,831 ;characteristic of the posts is not a requirement of the present invention. Rather, the exact dimensions of the post are a function of the particular application in which the present invention is used. The posts, 70 and 72, are attached to the base ring 50 by screws 74 which extend throu~h holes i~ the base ring S0 and into the posts.
Attached to the posts, 70 and 72, is a support plate 80. The support plate 80 extends in a direction which is generally perpendicular to the central axis of ;10 symmetry of the base ring 50. The primary function of the support plate 80 is to provide a means for mounting auxil-iary electronic components for the purpose of expandin~ tha capabilities of the kilowatt-hour meter with which the support structure of Figure 6 is used. Although support plate 80 is illustrated .in Figure 6 as bein~ a simple flat plate, it should be understood that in a typical applica-tion of the present invention, this plate would most likely be a printed circuit board. It should further be under-stood, however, that the precise types of components used as support plates with the present invention can vary significantly. They can comprise circuit boards, metallic support plates or other types of structures that are designed to fulfill a specific function required by the auxiliary equipment that is beiny added to the existing electrical apparatus.
In applications where the support plate 80 is a printed circuit board, such as a power amplifier circuit board, a heat sink 81 would generally be attached to it.
In this particular type of application of the present invention, the component illustrated by reference numeral 82 would be a lo~ic circuit board that is held to the powered amplifier circuit board 80 via a plurality of plastic snap-in fasteners 83. In one particular embodiment of the present invention, support plate 84 is metallic and contains printed information relative to the specific functions, style and part numbers of the electronic subas-sembly. The plate indicated by reference numeral 86 would :
~2~
18 51,831 contain prlnted information regardiny the style and part numbers of the meter with which the present invention is associa-ted in a particular application.
Other support plates 82 and 84 are also illus-trated in Figure 6. It should be understood that theprecise configuration and association of these support plates, 80, 82 and 84, can vary significantly based on the particular application of the present invention.
The present invention will be more fully under-stood by comparing the conventional meter of Figure 1 tothe meter of Figure 7 which includes the present invention.
Figure 7 illustrates a conventional kilowatt-hour meter that has been upgraded by the addition of the present invention. Prior to the addition of the present invention, the kilowatt-hour meter 100, illustrated in Figure 7, comprised the basic elements of the kilowatt-hour meter 10 of Figure 1. More specifically, prior to being upgraded, the kilowatt-hour meter of Figure 7 comprises the base 12, the frame 30, the rotatable disk 32 and its shaft 34, the register 40 with its faceplate 42 and the related compo-nents which are illustrated in both Figures 1 and 7. In order to upgrade the kilowatt-hour meter 10 to the improved kilowatt-hour meter lOO, a base ring 50 with its associated posts, 70 and 72, and its plurality of support plates, is connected to the base 12 of the kilowatt-hour meter ~y aligning the ridge (reference numeral 54 in Figure 4) with the slot (reference numeral 60 in Figure 4) and rotating a plurality of latches (reference numeral 62 in Figures 5, 6 and 7) in such a way that the raised body (reference numeral 120 in Figure 5) exerts a force against the frame in a direction away from the base 12. This force results in an equal opposing force which pushes the base ring 50 against the base portion 12 of the meter. This action o the latches 62 effectively attaches the present invention to the base 12 and, as discussed above, the latches 62 also prevent rotation of -the base ring 50 about its central axis of symmetry. The posts, 70 and 72, extend ~L2~33~
19 51,~31 in a direction away from the base 12 as shown in Fiyure 7.
A plurality of support plates, 80, ~2, 90, 92 and 95 are attached to the posts in such a way that they are disposed in a direction which is generally perpendicular to the central axis of symmetry of the base ring 50. The plurali-ty of support plates provide support for additional elec-tronic components and circuitry that are used in updating the capabilities o~ the subject kilowatt-hour meter.
When the present invention is used to upgrade existing electrical equipment, various types of electronic components can be added to the kilowatt-hour meter. For example, a kilowatt-hour meter can be upgraded to include time of use metering, rolling demand metering, LED rate indication, load survey devices or operational relay coils along with many other alternative components.
Also shown in Figure 7 is an electronic display 94 with its bezel 96. The inclusion of an electronic display 94 is another one of the optional capabilities provided by the support structure of the present invention.
However, it should be understood that the specific elec-tronic components added to the meter and supported by the present invention do not, b~ themselves, relate directly to the requirements of the present invention. The primary purpose of the support structure of the present invention is to provide a means for supporting various kinds of auxiliary electronic components to an existing kilowatt-hour meter.
In a preferred embodiment of the present inven-tion, the support plates are provided with an opening therethrough to enable an observer to visually observe the front plate 42 of the register 40. Even though an addi-tional electronic register 94 is shown attached to the present invention in Figure 7, it should be understood that in certain circumstances, it is desirable to also provide the capability of viewing the existing mechanical register 40. In order to provide this capability, openings must be provided in all of the support plates t~at lie between the 51,831 front surface 93 of the cover 91 and the indicia portion of the front plate 42 of the reyis~er 40. This capability will be discussed in greater detail below in relation to the frontmost support pla-te 92. Of course, it should be understood that in applications that do not include exist-ing registers that are visually readable, openings in the support plates of the present invention are not required.
This particular feature is merely provided in order to allow an operator to visually observe a register by looking through the openings of the present invention and this , feature is only provided when it is necessary.
By comparing Eigures l and 7, it should be apparent that an elongated cover 91 replaces the existing cover 14 of the kilowatt-hour meter. An elon~ated cover is a requirement when the support plates and posts of the present invention extend away from the base portion 12 by a dimenslon greater than the original cover 14 would other-~ wise permit.
`~ Figure 8 illustrates a frontal view of the front most support plate 92. As can be seen in Figure 8, this support plate 92 has an opening 108 ~hrough which the fxont plate 42 and its dial indicators can be observed through the ront surface 93 of the cover ~1. Screws 104 and 105 connect the support plate 92 to the posts and spacers which provide rigid attachment of the support plate 92 to theother components of the present invention. The plate 86 is detachahle rom the support plate 92 and is held i,n place by screws, 102 and 103. The plate 86 is not an absolute requirement of the present invention, but permits descrip-tive indicia to be added to the front portion of support plate 92. Typical information that could be contained on the front surface of plate 86 include the class, voltage, serial number, style number and other related information that is descriptive of the updated kilowatt-hour meter 100.
Viewing Fi~ures 7 and 8 together, it should be apparent that each of the support plates illustrated between the register 40 and the front surface 93 of the ,, ' 3~"
21 51,~31 cover 91 also have an opening throuyh them. These openings are generally similar in shape to opening 108 and are aligned in such a way so as to permit an observer to vlew the front plate 42 of the register 40 through the front surface 93 of the meter cover.
The advantages of the present invention can be seen in the i~llustration of Fi~ure 7. The present inven-tion, with all of its added electronic components, can be manufactured as a separate subassembly prior to delivering it to an existing kilowatt-hour meter in the field.
However, it should be clearly understood that a more typical application of the present invention is the upgrad-ing of kilowatt-hour meters during original manufacturing.
For example, if a manufacturer produces a basic kilowatt-hour meter and also offers a more sophisticated kilowatt-hour meter that employs additional electronic components, the more sophisticated units can be manufac-tured by utilizing the basic kilowatt-hour meter along with the present invention. This permits the manufacturer to avoid the necessity o producing and storing two different styles of kilowatt-hour meters. Instead, the basic kilowatt-hour meter can be manufactured in sufficient quantities for use as both the basic kilowatt-hour meter and a portion of the more sophisticated kilowatt-hour meter that would be combined with the present invention in order to provide the additional electronic components that are necessary in the more sophisticated meter. Therefore, it should be understood that the present invention can be used by meter manufacturers in order to simplify the upgradin~
of kilowatt-hour meters during original manufacture or, alternatively, can be used to upgrade existing meters that are already installed at consumers' residences. The additional electronic components would be mounted on the present invention for later attachment to kilowatt-hour meters. Electrical connections can easily be provided by flexible ribbon cable (not illustrated in Figure 7) which would be precisely shaped to conform to the specific 22 51,831 electronic components that are attached to the support plates of the present invention.
Installation of the present invention will be more fully understood by comparing Figures 1 and 7. In order to convert the kilowatt-hour meter 10 of Figure 1 to the upgraded kilowatt-hour meter 100 of Figure 7, the cover : 14 would be removed from the base portion 12. Then, support structure of the present inventlon (as illustrated in Figure 6), with all auxiliary electronic equipment attached to its suppo~t plates, would be positioned over the existing components of the kilowatt-hour meter 10 and its base ring 50 would then be placed against the base portion 12 with its ridge (reference numeral 54 in Figure 4) inserted into the groove (reference numeral 60 of Figure 4) of the base portion 12. Prior to latching the present invention to the existing meter base and frame 30, it can be rotated about its central axis of symmetry in order to properly align the auxiliary components attached to it with the existing components of the original kilowatt-hour meter 10. After being thus aligned, the latches 62 can be rotated by hand to rigidly attach the base ring 50 between the base portion 12 of the kilowatt-hour meter and its ~ frame 30 and prevent rotation of the base ring 50. By : rotating the latches 62, the base ring 50 and its associat-~,; 25 ed posts and support plates are fixedly attached to the base portion 12 of the kilowatt-hour meter. After making the necessary electrical connections, the elongated cover 91 is connected in locking relation with the base portion 12. Other than its elongated shape, the cover 91 is similar to the cover 14 and to the many covers known to those skilled in the art for use with kilowatt-hour meters.
In fact, the elongated cover 91 can usually be the cover that is typically used on polyphase meters. The cover and rim are generally a single assembly.
~eferrin~ again to Figure 7, it can be seen that the base ring 50 and the posts, 70 and 72, are arranged radially around the central axis of symmetry of the support ~2~ 3~1, 23 51,831 ring 50 in such a way so as to permit the support structure of the present invention to pass over -the existiny compo-nents (illustrated in Fiyure 1) without interfering with them. The posts, 70 and 72, support the plurality of support plates away from the existing components and enable the present invention to provide auxiliary equipment for use with the existing kilowatt-hour meter without adversely affecting its operation.
The present invention permits existiny kilowatt-hour meters to be upgraded by adding auxiliary electronic equipment. The auxiliary equipment can be manufactured as a single unit, along with the support structure of the present invention, and delivered to the field installation for upgradiny the meter. Flexible ribbon connectors can be used to provide necessary electri-cal connections between old components and auxiliary components and the openings throuyh the support plates of the present invention avoid obstruc-tion of view between the front surface of the meter cover and the original register.
Although the preferred embodiment of the present invention has been described in considerable detail and with particular ~xemplary structures, it should not be considered to be so limited. Alternative combinations of support plates and posts along with a modified support ring should be considered to be within the scope of the present invention.
Claims (9)
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An electrical apparatus, comprising:
a base;
a support structure comprising a base ring, a plurality of posts and support plate, said base ring having a central axis of symmetry and being removably attachable to said base ring, each of said plurality of posts having one end connected to said base ring, said support plate being attached to at least one of said plurality of posts, and being generally perpendicular to said plurality of posts, said posts being disposed on the base ring in a radial pattern about the central axis of symmetry of the base ring in such a way as to permit the support structure to pass over and beyond existing components mounted on the base; and means for removably attaching said base ring to said base, said attaching means comprising a plurality of latches, each of said plurality of latches having an axis of rotation and being shaped to be received in rotatable association with said base ring to removably attach said base ring to said base.
a base;
a support structure comprising a base ring, a plurality of posts and support plate, said base ring having a central axis of symmetry and being removably attachable to said base ring, each of said plurality of posts having one end connected to said base ring, said support plate being attached to at least one of said plurality of posts, and being generally perpendicular to said plurality of posts, said posts being disposed on the base ring in a radial pattern about the central axis of symmetry of the base ring in such a way as to permit the support structure to pass over and beyond existing components mounted on the base; and means for removably attaching said base ring to said base, said attaching means comprising a plurality of latches, each of said plurality of latches having an axis of rotation and being shaped to be received in rotatable association with said base ring to removably attach said base ring to said base.
2. The apparatus of claim 1, wherein:
said electrical apparatus is an electrical meter and said base is shaped to be mounted on a vertical surface.
said electrical apparatus is an electrical meter and said base is shaped to be mounted on a vertical surface.
3. The apparatus of claim 1, wherein:
said support plate has an opening therethrough, said opening being aligned with a component of said electrical apparatus.
said support plate has an opening therethrough, said opening being aligned with a component of said electrical apparatus.
4. The apparatus of claim 3, wherein:
said component of said electrical apparatus is a register.
said component of said electrical apparatus is a register.
5. The apparatus of claim 1, further comprising:
a cover disposed over said support plate, said posts and said base ring, said cover being attached to said base.
a cover disposed over said support plate, said posts and said base ring, said cover being attached to said base.
6. The apparatus of claim 1, wherein:
said support plate is a circuit board.
said support plate is a circuit board.
7. An electric meter, comprising:
a base, a frame attached to said base, said frame being associated with said base to define a gap between said frame and said base;
a first register attached to said frame, said first register having a plurality of dial indicators, each of said dial indicators being attached to a rotatable shaft, said first register having a faceplate with indicia disposed thereon, said dial indicators being associated with said indicia to represent a measured quantity;
a base ring shaped to fit in rotatable association with said base, said base ring having a central axis of symmetry;
a plurality of latches rotatable attached to said base ring, each of said latches having a latch portion shaped to fit within said gap upon rotation of its associated latch about its center of rotation, said latches being configured to exert a force against said frame when said latch portions are rotated into said gap, said force being in a direction away from said base and resulting in a force against said base ring in a direction toward said base;
a plurality of posts, each of said posts having one end attached to said base ring and extending in a direction away from said base;
a mounting plate attached to at least one of said posts said mounting plate being disposed in a generally perpendicular association with said central axis of symmetry of said base ring, said mounting plate having an opening therethrough, said opening being generally aligned with said indicia along a line generally parallel to said central axis of symmetry of said base ring; and a cover attachable to said base, said cover having a transparent portion aligned with said opening and said indicia.
a base, a frame attached to said base, said frame being associated with said base to define a gap between said frame and said base;
a first register attached to said frame, said first register having a plurality of dial indicators, each of said dial indicators being attached to a rotatable shaft, said first register having a faceplate with indicia disposed thereon, said dial indicators being associated with said indicia to represent a measured quantity;
a base ring shaped to fit in rotatable association with said base, said base ring having a central axis of symmetry;
a plurality of latches rotatable attached to said base ring, each of said latches having a latch portion shaped to fit within said gap upon rotation of its associated latch about its center of rotation, said latches being configured to exert a force against said frame when said latch portions are rotated into said gap, said force being in a direction away from said base and resulting in a force against said base ring in a direction toward said base;
a plurality of posts, each of said posts having one end attached to said base ring and extending in a direction away from said base;
a mounting plate attached to at least one of said posts said mounting plate being disposed in a generally perpendicular association with said central axis of symmetry of said base ring, said mounting plate having an opening therethrough, said opening being generally aligned with said indicia along a line generally parallel to said central axis of symmetry of said base ring; and a cover attachable to said base, said cover having a transparent portion aligned with said opening and said indicia.
8. The meter of claim 7, further comprising:
electronic components attached to said mounting plate, said electronic components being connected in electrical communication with other electronic components attached to said base by a flexible conductor.
electronic components attached to said mounting plate, said electronic components being connected in electrical communication with other electronic components attached to said base by a flexible conductor.
9. The meter of claim 7, further comprising a second register attached to said mounting plate, said second register being an electronic display device that is connected in electrical communication with a pulse initiator, said pulse initiator being operatively associated with electrical energy measuring apparatus attached to said base.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US630,034 | 1984-07-12 | ||
| US06/630,034 US4686461A (en) | 1984-07-12 | 1984-07-12 | Auxiliary equipment mounting ring for electric meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1262936A true CA1262936A (en) | 1989-11-14 |
Family
ID=24525491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000485241A Expired CA1262936A (en) | 1984-07-12 | 1985-06-26 | Auxiliary equipment mounting ring for electric meter |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4686461A (en) |
| KR (1) | KR860001349A (en) |
| CA (1) | CA1262936A (en) |
| ES (1) | ES8700444A1 (en) |
| GB (1) | GB2161945B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4994734A (en) * | 1989-09-25 | 1991-02-19 | General Electric Company | Register circuit board for electronic energy meter |
| US5311068A (en) * | 1991-05-22 | 1994-05-10 | General Electric Company | Solid-state energy meter with time-of-use rate scheduling and load control circuit |
| US6115259A (en) * | 1998-10-07 | 2000-09-05 | Zenith Electronics Corporation | Vibrationally isolated tuner |
| KR20030030401A (en) * | 2001-10-11 | 2003-04-18 | 백순미 | Methode for seasonings of freshwater fish |
| KR100427800B1 (en) * | 2001-12-13 | 2004-04-28 | 송명철 | Salted mackerel containing components of a tangleweed and the method of making that, half-dried fish containing components of a tangleweed and the method of making that |
| US20060214654A1 (en) * | 2005-03-28 | 2006-09-28 | Trisco Technology Corp. | [conducting structure of a meter] |
| US7800890B1 (en) | 2009-11-06 | 2010-09-21 | General Electric Company | Meter cover molding and method |
| CN106228679B (en) * | 2016-07-29 | 2018-11-20 | 厉建奇 | A kind of portable type solar energy power supply sale of electricity personnel sale of electricity card reading integral machine |
| CN114062729B (en) * | 2021-11-18 | 2023-04-18 | 山东志全电气技术有限公司 | Multifunctional electric power instrument convenient to plug and pull |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2147895A (en) * | 1935-07-27 | 1939-02-21 | Sangamo Electric Co | Maximum demand register |
| US3143704A (en) * | 1960-02-26 | 1964-08-04 | Westinghouse Electric Corp | Induction meter having magneticallysupported rotor |
| US3178110A (en) * | 1962-05-16 | 1965-04-13 | Westinghouse Electric Corp | Meter register |
| US3309152A (en) * | 1963-08-09 | 1967-03-14 | Westinghouse Electric Corp | Magnetically-supported-rotor devices |
| US3913014A (en) * | 1974-06-13 | 1975-10-14 | Westinghouse Electric Corp | Demand meter for on-peak maximum demand metering |
| US3943498A (en) * | 1974-09-26 | 1976-03-09 | Westinghouse Electric Corporation | Direct input photoelectric pulse initiator for meter telemetry and recording systems |
| US4081746A (en) * | 1975-11-06 | 1978-03-28 | Westinghouse Electric Corporation | Multiple rate meter |
| US4034292A (en) * | 1976-02-18 | 1977-07-05 | Westinghouse Electric Corporation | Direction sensitive opto-electronic pulse initiator for electrical meters |
| US4047024A (en) * | 1976-03-18 | 1977-09-06 | Westinghouse Electric Corporation | Photoelectric disc reader with alternate reading locations |
| US4156184A (en) * | 1978-06-01 | 1979-05-22 | Westinghouse Electric Corp. | On-peak watthour demand meter having compensation for disc loading variations |
| US4307341A (en) * | 1979-12-11 | 1981-12-22 | Westinghouse Electric Corp. | Clutch mechanism for time of day watt demand meter registers |
| US4491789A (en) * | 1981-08-14 | 1985-01-01 | Westinghouse Electric Corp. | Electrical energy meter having a cover-mounted time-of-day multifunction register |
-
1984
- 1984-07-12 US US06/630,034 patent/US4686461A/en not_active Expired - Fee Related
-
1985
- 1985-06-26 CA CA000485241A patent/CA1262936A/en not_active Expired
- 1985-07-04 GB GB08516965A patent/GB2161945B/en not_active Expired
- 1985-07-11 ES ES545089A patent/ES8700444A1/en not_active Expired
- 1985-07-12 KR KR1019850004989A patent/KR860001349A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| ES8700444A1 (en) | 1986-10-01 |
| US4686461A (en) | 1987-08-11 |
| GB2161945A (en) | 1986-01-22 |
| GB8516965D0 (en) | 1985-08-07 |
| GB2161945B (en) | 1988-05-18 |
| KR860001349A (en) | 1986-02-26 |
| ES545089A0 (en) | 1986-10-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |