US2285882A - Time delay transfer mechanism - Google Patents

Description

June 9, 1942.

H. H. ANDERSEN l-frAL TIME DELAY TRANSFER MCHANISM Filed Nov. 7, 1959 LS tu: vsn. Ik

I Inventor-s: Her-bert H Ander-seh.,

Donald G. Gamer-on,

Their' Attorneg.

Patented June 9, 1942 UNITED STATES PATENT OFFICE TIlVIE DELAY TRANSFER MECHAN ISM Herbert H. Andersen, Beverly, and Donald G. Cameron, Lynn, Mass., assignors to General Electric Company, a corporation of New York Application November 7, 1939, Serial No. 303,255

" this register is in operation .is charged at a 12 Claims.

Our invention relates to dual rate meters and concerns particularly apparatus arranged for metering electric current at lower rates during certain times of the day or under certain conditions.

It is an object of our invention to provide a dual rate meter with a mechanism assuring the central station customer that he will not be charged at an excessive rate in case of voltage failure on the system upsetting the normal division of time between high and low rate registers.

Another object of our invention is to provide a mechanism for maintaining a meter at the lower rate setting regardless of subsequent conditions in the electrical system after a voltage failure or an interruption in service has-occurred. Other and further objects and advantages will become apparent as the description proceeds.

In carrying out our invention in its preferred form we interpose a mechanism in the linkage for shifting the registers from high rate to low rate setting, such that in case of voltage failure the low rate setting continues until the apparatus is reset, unless the voltage failure is of such a short duration as not to be of consequence in causing excessive charges being levied on the central station customer.

The invention will be understood more readily from the following detailed description when considered in connection with the accompanying drawing and those features of the invention which are believed to be novel and patentable will be pointed out in the claims appended hereto. The single figure of the drawing is an exploded perspective view of one embodiment of our invention partially distorted and rearranged for the sake of clarity.

Our invention may be utilized in connection with a dual load meter of the type described in United States Patent 2,132,256-Cameron. The apparatus described in the present application is similar to that disclosed in the Cameron patent with the exception that we addI a time delay transfer mechanism referred to generally by the numeral I0, parts of which replace the rigid connection between the bushing 55 and the shift lever 58 of the Cameron patent. The shift lever 58 of the Cameron patent corresponds to the shift lever 58' of the present application and is actuated by the time switch I3 to bring one or the other of the two sets of registerdials 24 or 25 into operation according to the time of the day. Since at certain times of the day a central station can afford to sell electric power at lower rates, one of the sets of dials is referred to as the low rate register, andthe power consumed when electricity consumer, against continuance in operation of the high rate dials during a period when the customer should be charged the low rate, a time delay mechanism isprovided for connecting the low rate dials in case of interruption of operation of the time switch as by reason of temporary voltage failure, for example. As will be explained more in detail hereinafter, in case of interruption in electric service, the mechanism I0 renders the connection between the bushing 55 and the shift lever 58 ineffective, in order to cause the low rate dials to be continued in operation indefinitely until the apparatus is corrected and reset by the representative of the central station company.

The portions of the apparatus of the present application common to the'aforesaid Cameron patent are. for the sake of completeness of disclosure, described as follows: There is a powerresponsive integrating mechanism or watt-hour meter unit -I I, a double-dial register I 2, and a time switch unit I3, with connections to a source of electric current or power I4, to a water heater I5, or other relatively large and constant wattage load, and connections to a variable wattage load f I5, such as lights and appliances which may be turned on and off according to the needs of the customer whose electricity load is metered by the apparatus.

The watt-hour meter unit II is of the wellknown conventional design, having a voltage or pressure winding Il connected across the current source I4, current coils I8 connected between input terminals I9 and output terminals 20 so as to carry the load currents, an induction disk 2I acted upon by windings I'I and I8, and a shaft 22 supporting the disk 2l and carrying a worm wheel or helical threads 23 for driving the dials of a register through suitable gearing.

The register I2 is of the double-dial type having two independent dials or sets of dials 24 and 25, including driving shafts 26 and 21, respectively, and gearing (not shown) for converting rotation of the driving shafts into appropriate rotation of the dial pointers. The dials 24 and 25 may be referred to as high rate and low rate dials, respectively. A horizontal shaft 28 is provided, carrying a worm gear 29 meshing with the worm 23, and carrying a worm wheel or threaded portion 30. The shafts 26 and 21 carry worm gears 3| and 32, respectively, adapted to mesh withthe worm 30. The ends of the shafts are supported in bearings carried by a bifurcatedY spurs 36 adapted to t between adjacent gear teeth. It will be understood that the arrangement of the arm 33 and the positions of the shaft 28 and the detents 35 are such that one or the other of the gears 3| and 32 is in. mesh with the worm' 3|), being then clear of the associated detent 35, whereas the gear not in4 mesh with the worm 30 is engaged by one of the detents 35. Thus, dial readings are prevented from changing except by operation of `the meter unit I I. y

In order that it will be unnecessary to examine the interior of the mechanism and study its construction to determine which of the dials 24 and 25 is at the time connected or in which position the time switch I3 is, a target or indicator 31 is provided and an aperture 31 is out in therfront plate 38 of the register I2 for the purpose of showing the existing condition of the apparatus in this respect.

Suitable means are provided for indicating a distinction between the dials 24 and 25. For example, their pointers 39 and 4U may be painted distinctive colors such as black and red and the target 31 may be divided into two areas 4I and 42, painted red and black, respectively. The target 31 is arranged to drop into the position exposing the red 4| when the gear 32 of the red pointer dial 25 is in mesh and to rise into the position exposing the black 42 when the gear 3| of the black pointer dial 24 is in mesh. In the arrangement shown, the target 31 is part of a bell-crank lever 43 mechanically connected by a pin 44 and a crank 45 to the rod 34 carrying the arm 33. As will be explained more in detail hereinafter, the bell crank 43 is operated by the time-switch unit I3 to shift the dial connection and the indicator position at the desired times of the day.

The time-switch unit I3 includes a timing motor 46 connected across the meter input terminals I3, a rotatable time dial 41, a train of gears 48 including a slip clutch 49 for connecting the motor 46 to the dial 41, a stationary pointer 50, and a snap-action movable member 5| for operating both a switch 52 and the bellcrank lever 43 of the register I2. For the purpose of operating the movable member 5I, the dial 41 carries one or more on riders 53 and one or more 01T riders 54, all of which are adjustable in position on the periphery of the dial 41. The movable member 5I is pivotally mounted by being secured to a rotatable bushing 55 tting over a post 56 attached to a stationary plate (not shown). There is also a shift lever 5B' carrying a pin 59 for engagement with a slotted portion of the bell-crank lever 43.

Means involving our present invention and including portions of the time delay transfer mechanism I0 are interposed between the bushing 55 and the shift lever 56 for the purpose of causing the shift lever 58 to remain in the low rate position corresponding to the on position of the time switch indenitely in case of voltage failure, as will be explained more in detail hereinafter.

The member 5I is arranged to be moved between two limiting positions, designated on and oil positions, by snap action. To this end, a member 66, having a transverse projection 6| at one end and a spring-receiving eye 62 at the other end, is pivotally mounted upon the member 5I. The projection 6| is of just sucient length to engage the off riders 54 but not the on riders 53. It lwill be observed that the off riders 54 have extending fingers lying behind the plane of the dial 41, whereas the "on riders 53 have extending fingers lying in iront of the plane of the dial 41. There is a biasing spring 63 fastened at one end in the eye 62 of the member 60 and fastened at the other end to a pin (not shown) on the stationary plate (not shown). The memberV 5I is notched at the end to form a step-shaped configuration with an on notch 64 at a greater distance from the pivot post 56 than the 01T notch 65. There is a spring-biased detent 66 cooperating with the stepped notches 64 and 65 and the detent 66 isA connected by Aa pivot shaft 61 to an arm 68 in front of the dial 41. The arm 68 carries a pin 69 of just enough length to engage the on riders 53 but not the off riders 54.

The switch 52 comprises resilient switch blades 19, carrying movable contacts 1I, stationary contacts 12, insulating thrust members 13, and a rod 14 projecting transversely from the movable member 5I.

In order that the time-switch unit I3I may be reset, a slotted adjusting knob 16 is provided which may be turned by a suitable implement, such as a screw driver, or a suitable setting tool (not shown). Y

The apparatus illustrated in the present application diiTers from that shown in the aforesaid Cameron patent in that the shift lever 58 is not rigidly attached to the bushing 55 but is pivotally mounted atrthe end of a crank secured to the bushing 55 so that the lever 58 and the crank 99 together form a jointed shift lever corresponding to the rigidly connected shift lever 58 of the Cameron patent. Means are provided for causing the shift lever 58 normally to maintain a fixed position relative to the crank 96 so that the two together form a rigid lever, but under certain conditions this means permits such rigid lever to break or bend so as to cause the pin 59 to remain at the right hand low rate position even when the crank 90 is turned to the left by the operation of the time switch unit I3. This means is the time delay transfer mechanism which is referred to generally by reference numeral I0. It includes a member 9| pivotally mounted on the bushing 55 carrying a pin 92 upon which is pivotally mounted a limit lever 93 having a notch 94 in one end thereof. Cooperating with the notch 94 `and adapted to t into it is a tip 95 formed in the end of a bell crank 96 formed as a continuation of the lever 58. The lever 58 also has a transverse arm 91 and a spring 98 is connected between the arm 91 and the limit lever 93 for the dual purpose of bending the shift lever 58 to the right-hand or low-dial setting when the tip 95 is out of engagement with the notch 94 of agcsass the lever 93, and resiliently holding the limit lever 93 in an upward position.

Means are provided for normally holding the limit lever 93 and the shift lever 50' in the relative positions shown in which the tip 95 and the notch 94 are in engagement. This means takes the form of a latch 99 carried by the pivoted member 9| and a member |00 which takes a downward position when the apparatus is energized and includes a slot |I for receiving the latch 99. The edge |02 of the slot IOI is provided for preventing the latch 99 from swinging to the left and permitting the member 9| to turn from the position in which the tip 95 and the slot 94 are in engagement and the lever 58 in effect travels as a unit with the arm 90 when the bushing 55 is rotated. If desired hooks |03 and |04 may be provided on the members 9| and 93, respectively, for limiting the relative travel of these members. A pin |05 is provided for limiting the extent of clockwise rotation permitted to the shift lever 58 when the member 9| is in the angular position shown in which the tipr 95 and the notch 94 are intended to be in engagement.

The geometrical relationship between the parts is such that if the angular position of the member 9| should be relaxed slightly, the inside edge |06 above the elbow of the shift lever 58 would strike the pin |05 to prevent further rotation of the shift lever 58', but the moment arms from the pivots of the levers 58' and 93 to the points of attachment of the ends of the spring 98 and to the tip 95 and the notch 94 are such that the tip 95 bearing against the notch 94 would not deflect the lever 93 and normally'the shift lever 58 does not have occasion to strike the pin 95 when the member 9| is in its normal or operating position shown. However, the length of the lever 93 is such that when the member 9| is unlatched and turns to the left the slot 94 rides off the tip 95 and permits the tip to deflect to the right.

The slotted member |00 is so arranged that it is caused to remain in the downwardA position normally and caused to bend upwards in case of voltage failure interrupting time switch operation. To this end the member |00 is composed of temperature responsive bimetallicstrip material having a relatively low thermal coeicient of expansion material below and a relatively high thermal coefficient of expansion material above, for example, iron and copper, respectively, so that when the strip |00 is heated it bends downward and holds the latch 99 and when the strip cools off it bends upward and releases the latch 99. For maintaining the strip |00 normally heated, a heating coil |01 is provided directly connected to the strip |00 by means of a suitable bracket |08 composed of heat conducting material, such as metal. The strip |00 is supported at the left-hand end |09, but for the sake of ambient temperature compensation the support is not, made rigid but is subiected to the influence of a temperature compensating strip IIO for maintaining the location of the right-hand end of the strip |00 regardless of ambient temperature. The strips |00 and ||0 are connected at the left-hand ends to a thermally insulating block III which is pivotally secured to a pin ||2 connected to the stationary portion of the apparatus, not shown, and the compensating element IIO is also in the form of a bimetallic strip composed of materials having relatively high and low thermal coiron, respectively. Thev right-hand end of the strip |i|0 is adjustably secured by means of screw I|3 threaded into the stationary portions of the apparatus II4, and made rotatable to permit proper adjustment of the temperature responsive latching mechanism to cause the latch 99 to remain engaged so long as there is no voltage failure and to adjust the amount of time delay. For energizing the heater coil |01, it isconnected by means of a pair of conductors H5 to leads IIS, which are connected to the sourceof electric power I4 and energize the time switch unit I3. Preferably the strips |00 and H0 are not placed one above the other, but are staggered or if desired a shield may be employed,

to prevent heat dissipated by the strip |00 from affecting the compensator I I0.

For the purpose of permitting resetting of the time delay transfer mechanism after a voltage failure has occurred and has been corrected, the shaft |I`! carrying the time switch adjusting knob 'I6 is made axially movable and carries at its inner end a cone-shaped enlargement H0. Cooperating with the cone-shaped enlargement ||8 is an arm I I9 secured-to the pivoted member 9|. of the present application is not rigidly connected to the shaft I|7 of the time switch adjusting knob 'I6 but is provided with a keyway |20, and a key I2I dimensioned for a loose t in the keyway |20 is secured to the shaft III. The key I2! is so placed that in order to reset the time switch unit I3 by means of the knob i6 it is necessary to depress the knob 76 inward, sliding the key |2| into the keyway |20 and bringing the conical enlargement I|8 in engagement with the arm I I9 of the member 9| to move it clockwise angularly into the position illustrated. For resiliently biasing the member 9| to the counterclockwise angular position, that is, away fromthe normal position. a spring |22 is provided and connected between the lever arm |I9 and a transverse arm |23 formed. on the member 5| of the time switch unit I3.

The operation of the apparatusA when there is no voltage failure and when` the crank and the shift lever 58 are held together rigidly to form a rigid unit driven by the bushing 55 is as follows:

Let it be assumed that there is a valley in the central station load curve between two and fivethirty in the afternoon and that the central station can well afford to furnish power at a lower rate during this period if it can obtain additional load during this period. particularly if .it can be assured that such extra load cannot be connected between five-thirty and nine-thirty. the assumed peak load period. One of the on riders 53 is clamped at two oclock and one of the "o1T riders 54 is clamped at ve-thirty on the dial 4T. which rotates counterclockwise. Assuming that the dial is initially in the position shown in l. the first event will be that the rider 53 will. strike the pin 69. pushing it downward` The detent 55 will thereby be rotated clockwise against the force of its spring. the member 5| will be released. the spring 63 will draw the member 5| upward. and two functions of the member 5| will performed. First, the switch blades 153 will be allowed to riseA closing the switch contacts 'FI- 72 and connecting the water heater I5 to the supply source i4 through the meter unit II. Second, the shift lever 58 will be rotated to the right. The latter action,

eflicients of expansion, for example, copper and The time switch gear S2 in the apparatus4 in turn, will move the target 3l to bring the red portion 4I in view and will raise the arm 33 to bring the gear 32 in mesh, connecting the low rate red-pointer dial 25 to the meter unit It will be understood that the meter reader will note separately the readings of the dials 24 and 25 and that the central station will charge the kilowatt hours recorded on the dial 25 at a lower rate than those recorded on the dial 24.

Just before five-thirty, the olf rider 54 clamped at five-thirty on the dial will4 strike the transverse projection 6| of the member 60, thereby stretching the spring 63. Finally, the member 60 will have been rotated so far that the projection rides off the rider 54 while bearing upward against the rider 54, thus forcing the member downward with a snap action, the time now being five-thirty. The movement of the member 5I opens the switch contacts '|I-72 to disconnect the water heater I5 and shifts the bell-crank lever 43 to move the target 36 to the black 42 and to bring the gear 3| into mesh again to drive the black-pointer dial 24. It will be understood that additional on and olf riders may be provided for either filling in additional valleys in the load curve or for the purpose of preventing connection of the water heater I5 during peaks in the daily load curve.

Waterl heaters and other devices of like character are ordinarily so designed that they need not operate continuously and, since the heat is stored, it is immaterial whether they are connected during one time of the day or another. Consequently, it is desirable to provide apparatus for connecting a water heater at times of the day which will be most protable to the central station and will permit giving the customer a rate reduction. However', the apparatus :is useful also in case no load is to be controlled but different rates at different times of the day are desired.

In case of voltage failure which would stop or interrupt the operation of the time switch I3 energized by the voltage of the current source and which might be of such long duration as to cause the time indication of the time switch to be several hours slow, it is obvious that the time switch unit without the time delay transfer mechanism I0 might cause the high rate register 24 to be connected during the various hours of the day when the customer is entitled to the low rate, and during which the customer might have been drawing large loads upon the inducement of the central station company to offer low rates at certain times of the day. To guard against this unjust billing in case of voltage failure or interruption in operation of the time switch unit, the failure of voltage energizing the time switch unit i3 causes the coil |01 to be deenergized and to cool off permitting the strip |00 to cool and release the latch 99, whereupon the spring |22 moves the lever ||9 to a downward or counterclockwise angular position, moving the pin |05 to the left and also sliding the end of the lever 93 oif the tip 95 of the lever 58', thus freeing the tip 95 to permit the shift lever 50 to move in a clockwise direction, with the pin 59 moving to the right under the inuence of the spring 90, and causing the low rate register to come into engagement and remain in engagement regardless of subsequent angular positions of the bushing 55 produced by the time switch unit I3. Subsequent energization of the heater coil |01 upon recovery of voltage will cause the strip |00 to bend downward again but cannot cause reentry of the latch 99 into the slot IOI.

The mechanism is so adjusted that if the power interruption has been of an inconsequentially short duration, e. g., less than five minutes or any other predetermined period, the strip |00 does not cool sufficiently to unlatch the latch 99. The magnitude of time delay is determined by the design of the parts with suitable thermal conductivity and heat capacity, e. g., by making the high-rate release strip |00 of appropriate length and thickness. The time delay obtained may also be adjusted by varying the position of the heater coil |01 on the bracket |08 and by adjustment of the screw II3. Thus any desired period of time delay may be obtained.

After normal voltage conditions have been restored on the lines of the power station and when the power station has sent a representative to reset the time switch I3 in accordance with the correct time, such representative will depress the adjusting knob 'I0 in order to set the time switch. Simultaneously by reason of the engagement of the cone-shaped enlargement I|8 and the arm i II9, the member 9| will be reset to the normal clockwise angular position thereby moving the pin |05 against the inside edge |06 of theelbow of the shift lever 58 and bringing the holding lever 93 in position in which the notch 94 would engage the tip 95, thereby making the shift lever 58 and the crank 90 a rigid unit again. The voltage having been restored, the right-hand end of the strip |00 is in the downward position so that the latch 99 snaps into the slot I0| when the member 9| is rotated by the action of the cone IIS. However, in case the central station representative attemptsv to reset the mechanism before the voltage has been restored, the member |00 will remain up in an upwardly bent position and the member 9| will drop back to the low rate position as soon as the adjusting knob 16 is released.

In accordance with the'provisions of the patent statutes, we have described the principle of operation of our invention together with the ap-V paratus which we now consider to represent the best embodiment thereof but we desire to have it understood that the apparatus shown is only illustrative and that the invention may be carried out by other means.

What we claim as new `and desire to secure by Letters Patent of the United States is:

1. Apparatus for metering at differing rates two classes of load supplied by a common power source and controlling one of the classes of load according to the time, said apparatus comprising in combination, a power-responsive integrating mechanism including input terminals for electrical connection to a power source, output terminals for continuous electrical connection to a load of one class and intermittent connection to a load of a second class, a low rate register dial and a high rate register dial, a time switch unit energized by the power source, and having a movable member adapted to be moved to one or the other of two alternative positions according to the time, relatively movable switch contacts in operable relation with said movable member for connecting and disconnecting a load of the second class to and from the said output terminals, alternative connecting means for forming a driving connection between said integrating mechanism and one of the other of said registers, an operating connection between the movable member of the timeswitch and the' said alternative connecting means, and means responsive to connection ineffective 4and ymaintaining the low rate dial in operation.

`2. `In a Ldual `rate Vmeter including power-responsive integrating mechanism, a rotatable shaft carrying a wormzwheeL `a low rate :register dial and a -high rate register dial eachlincluding a driving shaft .carrying a worm gear adapted alternatively to mesh with said worm wheel, a time switch unit adapted to be energized by a source of power and having a movable member adapted to be moved to Vone or the other of two alternative positions according to the time, and supports `for saididialshaftswith a connection to said. movable member'in: such relation. as lto i cause one of `saidgears to mesh with .said worm wheel when 4said movable member is .in one position and to cause the other of said gears to ymesh with said worm wheel .when the movable member is in the other of its positions, said connection including an element .electrically connected to the time switch unit and normally energized by the saine power source energizing the time switch unit for normallymaintaining the sai-:l connection effective, and `means for rendering the connection between said supports and said movable member ineffective in response to interruption of the power source energizing the time switch .unit and the first said element includedin 'said connection, said connection also including another' element for resiliently biasing the supports for said -dialshafts tothe position in which the low rate register dial is driven.

3. A dual rate meter including a low rate register dial and a high rate register dial, alternative driving connections to said register dia-ls, a time switch unit for normally putting one or the other of said connections into effect according to the time, means for resiliently biasing the apparatus to the low rate connection, a power source for the time switch unit, and means normally energized by the same source and responsive to power failure for making the time switch unit ineffective to control said driving connection and leaving continuously effective the driving connection to the low rate register dial.

4. In a dual rate meter including a power responsive integrating mechanism, a low rate register dial and a high rate register' dial, each adapted to be driven by the integrating mechanism, alternative driving connections to said register dials, a time switch unit with energizing connections, shift mechanism normally operated by the time switch unit for making one or the other of said connections effective according to the time, and means connected to said energizing connections and responsive to interruption in energization for operating the shift mechanism to its condition effecting the connection between the integrating mechanism and the low rate register dial.

5. In a dual rate integrating meter, a low rate register dial and a high rate register dial, alternative driving connections to said register dials, a controller member having alternative conditions of operation in which it makes one or the other of said alternative driving connections effective, a selector for normally shifting said controller to one or the other of its operating conditions, and means with a power source for normally maintaining it inactive but responsive to power failure for transferring the controller to its condition effecting the driving connection to the low rate register dial,

6. In a dual rate meter `including a low rate register dial and a high rate register dial, 'alternative driving connections to said dials, one or :the otherof which is adapted to beeifective-ac- 1 .cording -to the position of a shift lever, the combin'ationof va -jointed shift lever having anaoperating end andadriven end with a joint between, a time switch unit Iadapted to move the driven endof the shift lever to one or the other of two alternative positions according to time, normally effective mechanism for maintaining said shift lever stiff so that `its operating end follows the motion-of the driven end,.and means normally energized for lnormally maintaining said mechanism effective and responsive t0 interruption in energization for releasing the joint of said shift 4lever and maintaining the operating end of the shift lever continuously in the positionl effecting connection to the low rate register dial.

7. In a dual rate meter including a low rate register dial and `a high rate register dial with driving connections to said dials adapted to he metered by l ently biasing'the operatingendof the shift lever made alternatively effective in accordance with the position of thefoperating end of a shift lever, the combinationof a shift lever having an'operating end anda driven end with a jointed connection therebetween, a time `switch unit attached to the said driven end for rshifting its position according to the time of vday and adapted to be energized by a source of current to be the dual -rate meter, means for resilito the vposition vin lwhich the `driving connection to the low rate register dial is effective, and an electroi'esponsive latching device for normally, when energized, maintaining effectively rigid the jointed connection of said shift lever to overcome the effect of the said biasing means and cause the operating end of the shift lever to move in response to the motion of the driven end thereof, said latching device being connected for energization by the same current source as the time switch unit and being adapted, when deenergized, to release said jointed connection.

8. In a` dual rate meter including a low rate register dial and a high rate register dial with driving connections to said dials adapted to be made alternatively effective in accordance with the position of the operating end of .a shift lever, the combination of a shift lever having an opere ating end and a driven end with a jointed connection therebetween, a selector connected to the driven end of the shift lever for shifting its position' back and forth for selecting one register or the other' and adapted to be energized by a source of current to be metered by the dual rate meter, means for resiliently biasing the operating end of the shift lever to the position in which the driving connection to the low rate register dial is effective, and a bimetallic latching device for maintaining rigid the jointed connection of said shift lever to overcome the effect of the said biasing means and cause the operating end of the shift lever to move in response to the motion of the driven end thereof, a current responsive heater in thermal connection with said bimetallic latching device, said latching device being so the other of which is adapted to be effective according to the position of a shift lever, the combination of a jointed shift lever having an operating end and a driven end, a time switch unit adapted to move the driven end of the shift lever to one or the other of two alternative positions according to time, said time switch unit having energizing connections, normally effective means for maintaining said shift lever stii so that its operating end follows the motion of the driven end, means for releasing the joint of said shift lever and maintaining continuously the connection to the low rate register dial in response to interruption in energization of the time switch unit, and means for readjusting the time setting of the time switch unit after interruption thereof and simultaneously resetting the rigid connection between the parts of the shift lever.

10. In combination, a timer, a shift lever adapted to be moved to one or the other of two alternative positions in accordance with. time, means resiliently biasing said shift lever 'to one of its alternative positions, mechanism for connecting said timer to said shift lever, and normally energized means associated with said mechanism for normally maintaining it effective and responsive to interruption in energizatiion for disconnecting said connecting mechanism.

1l. In combination, a timer, a shift lever adapted to be moved to one or the other of two alternative positions in accordance with time, means resiliently biasing said shift lever to one of its alternative positions, mechanism including a latch for connecting said timer to said shift lever, said connecting mechanism having connecting and disconnecting positions in which the connection is respectively effective and ineffective between the timer and the shiftl lever, and normally energized means adapted, while energized, to engage said latch and hold the connecting mechanism in the connecting position when the mechanism is moved thereto and responsive to interruption in energization for releasing said holding means and unlatching said connecting mechanism.

12. In combination, a normally energized timer, a shift lever adapted to be moved to oneor the other of two alternative positions in accordance with time, means resiliently biasing said shift lever to one of its alternative positions, mechanism including a latch for connecting said timer to said shift lever, said connecting mechanism having connecting and disconnecting positions, normally energized means adapted, while energized, to engage said latch and hold the connecting mechanism in the connecting position when the mechanism is moved thereto, and responsive to interruption in energization for releasing said holding means and unlatching said connecting mechanism, and means for resetting said timer to the correct time and simultaneously resetting said connecting mechanism to the latched position after an interruption in energization.

HERBERT H. ANDERSEN.

DONALD G. CAMERON.

CERTIFICATE oF CORRECTION.

Patent No. 2,285,882. June 9, 19142.

HERBERT H. ANDERSEN, ET AL.

It is hereby certified that error appears in the printed specification ofthe above numbered patent requiring correction as'o'ilows: Page 5, first column, line 26, claim 2, for "effective, and means for. read "effective anzi for-; and that the seid Letters Patent shouldbe read with this correction therein that the same may conform to the record of the case in the Patent Office. v

signed and sealed this Ath day of August, A. D. 19h22.

` Henry Van Arsdale, (Seal) 4 Acting; Commissioner of Patents.

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