US289896A - Leo daft - Google Patents
Leo daft Download PDFInfo
- Publication number
- US289896A US289896A US289896DA US289896A US 289896 A US289896 A US 289896A US 289896D A US289896D A US 289896DA US 289896 A US289896 A US 289896A
- Authority
- US
- United States
- Prior art keywords
- brake
- coils
- magnet
- daft
- leo
- 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 - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D63/00—Brakes not otherwise provided for; Brakes combining more than one of the types of groups F16D49/00 - F16D61/00
- F16D63/002—Brakes with direct electrical or electro-magnetic actuation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/18—Electric or magnetic
- F16D2121/20—Electric or magnetic using electromagnets
Definitions
- a brake is readily applied to a revolving wheel by magnetizing the core of an electro-magnet,whereby said core is drawn forward against the surface of the wheel, sliding through the coils of a magnet.
- Figure 1 is an elevation of part of a car, wheel, .and brake-attachment.
- Fig. 2 is an elevation showing the circuits and switch.
- the magnets are represented at G G. These magnets are provided with cores a, movable longitudinally therewith and yoked at the back. They are normally forced back by aspring, K; but when an electric current is caused to circulate through the coils G G, the cores become magnetized and are immediatelyattractedtoward and against the revolving wheel.
- the coils G G should preferably be madein independent sections or layers, which may be brought to aswitch, S, under the control oi the engineer, so that he may in succession throw on any number of said coils which he desires, thereby increasing the friction of the brake on the thread.
- brake arrangements may be instantly applied to the whole length of the train, as well as upon the engine, by simply connecting them in the well-known way by a single-wire connection directly to the engine if only one coil is intended to be used, or, if different sections, by a number of wires corresponding to those sections.
- the opposite end of the coils will of course be connected with the rail; or, in certain cases, the brakes may be mere duplicates of the one shown in Fig. 2. connected electrically with the single terminal of all the coils of the brake-magnet, the other terminals being separate, and being capable of being brought into connection successively with the switch S as it is moved over them.
- the coils are thus connected in multiple arc with the electric conductor.
- An electric brake,consisting of a magnet having several independent coils and a brakesurface operated by the magnet, the said coils being independently connected, so that they may be operated singly or in multiple are, substantially as described.
Description
(No Model.)
L. DAF-T.
ELBGTRO-MAGNETIG BRAKE. N0. Z 89 ,896.- Patented Dec. 11, 1883.
N. PETERS. Pgmm-Lnhn n hu. wnm c.
UNITED STATES,
PATENT OFFICE.
LEO DAFT, OF GREENVILLE, NEW JERSEY.
ELECTRO-MAGNIETIC BRAKE.
SPECIFIGATIONforming part of ietters Patent No. 289,896, dated December 11, 1883.
Application filed March 27, 1883. (No model.)
To all whom it may concern:
Be it known that I, LEOVDAFT, a citizen of Great Britain. and resident of Greenville, New Jersey, have invented a new and useful Improvement in Electro Magnetic Brakes, of which thefollowi'ng is a full, true, and exact description, reference being bad to the accompanying drawings.
By this improvement a brake is readily applied to a revolving wheel by magnetizing the core of an electro-magnet,whereby said core is drawn forward against the surface of the wheel, sliding through the coils of a magnet.
My invention will be readily understood from the accompanying drawings.
Figure 1 is an elevation of part of a car, wheel, .and brake-attachment. Fig. 2 is an elevation showing the circuits and switch.
In the drawings the magnets are represented at G G. These magnets are provided with cores a, movable longitudinally therewith and yoked at the back. They are normally forced back by aspring, K; but when an electric current is caused to circulate through the coils G G, the cores become magnetized and are immediatelyattractedtoward and against the revolving wheel. The coils G G should preferably be madein independent sections or layers, which may be brought to aswitch, S, under the control oi the engineer, so that he may in succession throw on any number of said coils which he desires, thereby increasing the friction of the brake on the thread. It is obvious that these brake arrangements may be instantly applied to the whole length of the train, as well as upon the engine, by simply connecting them in the well-known way by a single-wire connection directly to the engine if only one coil is intended to be used, or, if different sections, by a number of wires corresponding to those sections. The opposite end of the coils will of course be connected with the rail; or, in certain cases, the brakes may be mere duplicates of the one shown in Fig. 2. connected electrically with the single terminal of all the coils of the brake-magnet, the other terminals being separate, and being capable of being brought into connection successively with the switch S as it is moved over them. The coils are thus connected in multiple arc with the electric conductor.
hat I claim as my invention, and desire to secure by Letters Patent, is-- 1. An electric brake,consisting of astationary magnet or coil and a freely-moving axial armature carrying the brake-shoe, substantially as described.
2. An electric brake,consisting of a magnet having several independent coils and a brakesurface operated by the magnet, the said coils being independently connected, so that they may be operated singly or in multiple are, substantially as described.
3. In an electric brake, the combination,
with a fixed magnet, of a movable armature or core carrying brake-shoes and devices for holding said shoes normally out of contact with the wheel, substantially as described.
4.. In an electric brake, the combination, with a fixed magnet having independent coils, of a movable armature or core carrying the brake-shoes, devices for maintaining said shoes normally out of contact with the wheels, and means for connecting more or less of said coils in multiple-arc circuit, substantially as described.
LEO DAFT.
Witnesses:
GEO. H. EVANS, WVM. A. PoLLocK.
In this figure the current is normally 5
Publications (1)
Publication Number | Publication Date |
---|---|
US289896A true US289896A (en) | 1883-12-11 |
Family
ID=2359085
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US289896D Expired - Lifetime US289896A (en) | Leo daft |
Country Status (1)
Country | Link |
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US (1) | US289896A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2687546A (en) * | 1952-05-16 | 1954-08-31 | Oppenheimer Jess | Caster |
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0
- US US289896D patent/US289896A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2687546A (en) * | 1952-05-16 | 1954-08-31 | Oppenheimer Jess | Caster |
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