US973938A - Circuit-interrupter. - Google Patents

Description

F. W. HARRIS. CIRCUIT INTERRUPTBR. V APPLICATION FILED DEC. 14, 190B. 973,933 Patented 001;. 25, 1910.-

2 BKIIETBSHEET 2.

INVENTOR ATTORNEY ing magnet UNITED sums up OFFICE.

FORD W. HARRIS, OF WILKINSBURG, PENNSYLVANIA, ASSIGNOR I O WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYLYANIA.

CIRCUITJNTERRUPTER.

Specification of Letters Patent.

Patented (Jet. 25, 1910.

i Application tiletl December 14, 1908. Serial No. 487,524.

To all whom it may concern:

Be it known that I, Font) W. I'IARIHS, a citizen of the'United States, anda resident of Wilkinsliurg, in the county otlAllegheny and State of Pennsylvania, have invented a new and useful Improvement in Gircuitlnterrnpters, of which the following is a specification.

My invention relates to circuit interrupters, and it has for its objectto provide an automatically actuated device of this character that shall besimple and compact in construction and capable of remote control.

Figures 1 and 2 of the accompanying drawing are side elevations of a circuit interrupter constructed in accordance with my invention, and respectively in open and in closed position.

Referring to the drawings. the device illustrated comprises an insulating slab or base 1,'st.ationary contact. terminals 2 and 3 having bolt projections-i and 5 which extend through the insulatii-ig base 1 and constitute the terminals of the device, a movable bridging contact member (3, av closing magnet 7 and a tripping magnet 8.

The bridging contact member (1 supported by a lever 12 one end of which is pivotally mounted upon a shaft 9 that is sup portcd by a bracket 10, said bracket being secured to the base by screws 11. The clos- 7 com-prises stationary and movable core members 13 and 14 and a mag net Winding 15, and the tripping magnet comprises stationary and movablecore members 16 and 17 and a coil 18, both of the magnets being supported by a single bracket 19 which secured to the base 1 by screws 20. The movable core member 14 is p'ivotally suspended from a lever 21 the end of which is mounted on a stationary shaft 22. v

an insulating link 26 which constitutes the handle grip by which the interrupter may be manually operated. The links 24 and 26 and the levers 23 and 21 are so arranged asto hold the circuit interrupter closed by assuming a locking relation when themember 6 is moved into closed position, either operating handle 26.

manually or by reason of the energivlation of the closing magnet 7.

A bell crank lever 27 is supported by the shaft 22 and is provided with a pin projection 28 which engages the lever 21' and with a second projection'2t) which is adapted to be engaged by a latch 30, which forms a part of the tripping mechanism, when the interrupter is closed. The latch '30 is pivotally mounted on a shaft 31 and is provided with a projection which is-engagcd by ahammer rod 33, that forms a part of the movable core member 17 and extends through the stationary core memberltl of the magnet S. ()no arm of the-bell crank lever 27 is connected to one end of a spring iltwhich tends to so rotate thebell crank lever as-to open the circuit interrupter as soon as the latch 31) is released by the action of the tripping magnet. Sincethe leverL'l engages the pin projection 28, the bell crank lever will be held stationary by the latch 30 whenever. the circuit interrupter is closed. The outer-end of the lever 12 is provided with an arcing contact member 35, which is adapted to engage a corresponding contact member 36' that forms a part lot the sta; tionary contact member 2. Since the oint of connection between the lever--21 an. the movable core member 14of the operating magnet 7 is relatively near the fulcrum 22, the maximum air gap existing between the movable and stationary: core members 13 and 14 may be relatively small, and, since the lever 23 is fulcrumed at an intermediate point which is relatively nee-r: the link, 24, the interrupter may be ,readily.clos'ed "by the The operation ofthe device is asfollowsz Assuming that the breaker occu has its open position, as shown in Fig. 1 of t e drawings,

t may be closed by a downward movement j i of the handle grip 26 which may be effected manually or by the magnet coil 15. In either. case, the levers 21 and; 27 are rotated in a clockwise direction, in-opposition to the spring 34, until the latch 30 engages the pin 29, as shown in Fig. 2. The operating parts 21, 26, 23 and 24 are then free from the action of the spring 34 and their proportions and arrangement are such as to lock the breaker closed. The breaker may be opened by the manipulation ofthe handle 26 without releasing the lever 27 or it may said levers and .links to open mally holding ,adaptedto actuate said lever with stationar .rupter be automatically opened by energizing the magnet coil 18 torelease the latch 30 and allow the spring 34 to act upon; the lever 21,. thereby breaking the toggle joint formed by the arts 21, 26, 23 and 24.

T e structural details of the device may, of course, be variedwithout departing from the spirit of my invention, andI desire that only such limitations shall be" imposed a-s are indicated in the appended claims. I

I claim as my invention:

L'The combination with stationary and movable contact members and an operating lever for the movable contact member, and an interposed link, of a solenoid, a core a lever to which said core is attached, a link interposed between said levers and consti- I tuting a handle grip for manually operating said movable contact member, and an electro-magnetically released lever for actuating the breaker.

2. In a circuit breaker, the combination with stationary contact terminals, 3. movable contact member, an operating lever and link a. remotely controllable lever and an insulating ,linkinterposed between it and said operatin lever, of a spring-restrained I lever adapt-e to be actuated in one direction by said remotely controllable lever and l in the opposite direction, and an clectromaguetically actuated latch forholdin said spring-restrained lever to permit independent manual operation of .the remotely controllable lever to open the breaker.

3. In a circuit breaker, -'the combination Y contact terminals, a movable contact member, a set of cooperating links and levers adapted for manual opera-' tion to open or close the breaker and a solenoid and (mi-e for operating said links and levers to close the breaker, of a springactuated lever for tripping the link and lever mechanism to open the breaker, and an electromagnetically actuated latch for norsa id spring-actuated. lever in I an inactive position.

The combination with a circuit inter- I comprising an" insulating plate or arm of said bell crank lever I the magnet lever to. constitute a handle grip member pivotally mounted on the bracket,

,an operating lever fulcrumed at the outer end of the bracket, and a link between. said brid ing contact member and said operating ever, of a remotely controllable lever, a bell crank lever actuated by said remotely controllable lever, a spring secured to one to oppose the action of said remotely controllable lever, a latch for restraining the bell crank lever against the action of said sprin a tripping magnet for the latch and a lin of insulating material interposed between the operat ing lever and the remotely controllable lever to constitutea handle grip for the manna operation of the interrupter.

The combination with an insulating plate or slab, a circuit interrupter comprising stationary contact members, a stationary bracket securedto the plate or s1ab,'a bridging contact i'ncmber ivotally mounted .on the bracket, an o crating lever fulcrumed at the outer end of the bracket and a link interposed between the inner end of the operating lever and thebridging contact member, of a remotely controllable means for governing the circuit interrupter said means col-uprising a stationary bracket indcpendent of the interrupter, an operating electro-magnet and a releasing electro-magnet, a lever pivotally secured-to the magnet bracket, :1 bell crank lever fulcrumed on the same axis and having a projection to enga e said lever, a spring tending to rotate t e lever in opposition to the pull of the operating electro-n'iagnet, a latch for restraining the bell crank lever and an insulating link, interposed between the operating lever and for manually operating the interru ter. Iii-testimony whereof, I have ereunto subscribed my name this 30th day of No vember, 1908. v

' FORD W. HARRIS Witnesses:

C. Aannono, BmNnY I-lmns.

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