US768227A - Electric switch and circuit-breaker. - Google Patents
Electric switch and circuit-breaker. Download PDFInfo
- Publication number
- US768227A US768227A US18930804A US1904189308A US768227A US 768227 A US768227 A US 768227A US 18930804 A US18930804 A US 18930804A US 1904189308 A US1904189308 A US 1904189308A US 768227 A US768227 A US 768227A
- Authority
- US
- United States
- Prior art keywords
- circuit
- breaker
- switch
- motor
- magnet
- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/18—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual dc motor
- H02P1/20—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual dc motor by progressive reduction of resistance in series with armature winding
Description
PATENTED AUG. 23, 1904.
A. J. HORTON. ELECTRIC SWITCH AND CIRCUIT BREAKER.
APPLICATION FILED JAN. 16. 1904.
N0 MODEL.
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a a/M .21 gm A Z456 r61 15%72072 7% UNITE STATES Patented August 23, 19 14.
PATENT OEEIcE.
PORATION OF \VISOONSIN.
YORK, ASSIGNOR TO THE MILWAUKEE, \VISOONSIN, A COR- ELECTRIC SWITCH AND CIRCUIT-BREAKER.
SPECIFICATION forming part of Letters Patent No. 768,227, dated Augu 23, 1904. Application filed January 16, 1904. Serial No. 189,308. (No model.)
To all whom it may concern:
Be it known that I, ALBERT J. HORTON, a citizen of the United States of America, and a resident of hiteplains, county of IVestchester, and State of New York, have invented certain new and useful Improvements in Electric Switches and Circuit-Breakers, of which the following is a specification.
This invention relates to a circuit-breaker for electric current, and is designed especially for the emergency interruption of motor-armature circuits.
It is combined with a hand-operated motor starting and controlling switch by which the motor is started, controlled, and stopped in such manner that upon the operation of the circuit-breaker from any cause it cannot be closed until the starting-switch has been re stored to its starting position.
The specific emergency device which is herein disclosed is an under-potential magnet arranged to open the circuit-breaker when the line potential falls materially or the supply of current ceases.
In the accompanying sheet of drawings, which forms a part of this specification, the figure is a front View of a slate with the circuit-breaker, starting-switch, and other apparatus mounted thereon, and combined with this is a diagram of the circuits therefor.
The apparatus illustrated comprises a motor M, which is supplied from two leads A B through a line-switch L, a motor starting and controlling switch and rheostat, and an independent circuit-breaker for opening the armature-circuit in an emergency such as arises upon the failure of current through the operation of an under-potential relay-magnet, which will be described in detail later. The motor has a shunt field which in this drawing is independent of the contacts of the rheostat and motor-starting switch and the circuit-breaker and is connected directly to the leads inside the line-switch, so that it will be open only when the line-switch is open.
A slate slab 1 carries a metal stud 2, on which a lever 3 is fulcrumed. The lever is provided with an operating-handle 4 and is operated across a series of rheo'stat-contacts 5. Resistance-sections 6 are connected to these contacts. The slate also carries a circuit-breaker consisting of two contact-posts 7 8 andpreferably a pile of strips of sheetcopper 9 for bridging between the posts. This bridging-piece is carried by the armature of a relay-magnet 10, also mounted on the slate. IVhen the magnet is energized, the bridging-piece is drawn against the posts and electrical connection is established between the posts, through which current is admitted to the armature. The relay-magnet is in the form of a solenoid, and a stem 11, of nonmagnetic material, is connected to the armature and moves. with the armature and circuit-breaker. This stem projects through the upper end of the relay-magnet. Its use will be discussed later;
The relay-magnet is energized by a controlling-circuit between the supply-leads which is independent of the armature-circuit.
- As illustrated, it is connected directly between the leads, and hence the magnet is wound with a great number of turns of fine wire, so
as to have a sufliciently-high resistance to withstand the voltage used. The magnet re ceives current directly from the supply-leads and is so adjusted that its armature will be released if there is any material fall in the potential between the supply-leads or cessation in the supply of current. The magnet therefore acts as an under-potential emergency device to disconnect the motor-armature from the line.
henever the circuit-breaker is operated by reason of the failure of current through the relaymagnet and the motor-starting lever is at a running position either toward the position?) for forward operation of the motor or toward the position 3" for reverse operation of the motor, a latch 12 mechanically engages a collar 13 on the stem 11 and prevents the closure of the circuit-breaker until the motorstarting switch-lever has been brought toward or restored to the initial position 3 sufficiently to engage an arm 1 of the latch and withdraw the latch. This arm is engaged by an insulated stud or roller 15 projecting from the lever. The circuit-breaker falls by gravity to its open position when released by the relay-magnet, and the latch falls by gravity into locking engagement with the collar on the stem.
What I claim as new, and desire to secure by Letters Patent of the United States, is
The combination of a hand-operated motorstarting switch, an electrically-operated circuit-breaker, a motor-armature circuit containing the motor-starting switch and circuitbreaker in series, a relay-magnet for closing and holding the circuit-breaker in closed po-
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18930804A US768227A (en) | 1904-01-16 | 1904-01-16 | Electric switch and circuit-breaker. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18930804A US768227A (en) | 1904-01-16 | 1904-01-16 | Electric switch and circuit-breaker. |
Publications (1)
Publication Number | Publication Date |
---|---|
US768227A true US768227A (en) | 1904-08-23 |
Family
ID=2836713
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US18930804A Expired - Lifetime US768227A (en) | 1904-01-16 | 1904-01-16 | Electric switch and circuit-breaker. |
Country Status (1)
Country | Link |
---|---|
US (1) | US768227A (en) |
-
1904
- 1904-01-16 US US18930804A patent/US768227A/en not_active Expired - Lifetime
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