US1685934A

US1685934A - Circuit breaker

Info

Publication number: US1685934A
Application number: US483384A
Authority: US
Inventors: Andrew H Bakken
Original assignee: Westinghouse Electric and Manufacturing Co
Current assignee: CBS Corp
Priority date: 1921-07-09
Filing date: 1921-07-09
Publication date: 1928-10-02
Anticipated expiration: 1945-10-02

Description

0a. 2,1928. 1,685,934 A. H. BAKKEN CIRCUIT BREAKER Filed July 9 l 4 Sheets-Sheet 1 I i iii a u ATTORNEY Oct. 2, 1928. 1,685,934

A. H. BAKKEN CIRCUIT BREAKER Filed July 9; 1921 4 Sheets-Sheet 2 WITNESSES: INVENTOR Oct. 2, 1928.

S A. H. BAKKEN CIRCUIT BREAKER Filed July 9, 1921 4 Sheets-$heet 3 I .24: r a i l l l T Q I {I i I m I6 16' 1 15 I W J 1 I in: I f 4 o q/44 l I 1 .24 e4 1% Q? o WITNESSES:

; ATTORNEY Oct. 2,1928. 1,685,934

A. H. BAKKEN CIRCUIT BREAKER Filed July 9. 1921 4 she ts-sheet 4 jgld I I 0 I 0 I m E I l l I o a X o t 31 3'1 WITNESSES: INVENTOR ,Bdfilm.

i tank employed by; me.

' the members Patented Oct. 2, 1928.

ANDREW H. BAKKEN, 0E PITTSBURGH,

HOUSE ELEoTEIo' & MANUFACTURING" ooMP nY; A CO PORA ION OF rE vNsYL I VANIA.

CIRCUIT Application fi1ed July '9;

My invention relates to electrical circuit;

breakers and more particularly to} operating: mechanisms therefor and their supporting structures.-

One of the objectsof my invention is to:

simplify and'to reduce the cost of construction of. circuit breakers, with special refer encejtoihose of the fluid-immersed type.

Another object of my invention is to so form. certain .portions oi":- the .circuit breaker that they may 'be'stamped out of sheet-metal,

' thus'avoiding the necessityiot employing an unnecessary number'ofcast metal parts and eliminating the, machiningaoperations which have beeniheretofore deemed necessary;

Another object of my invention is to provide. circuit, breaker: in which a maximum effectiveness:of'bperation is secured at a;mini-- mumcost oficonstruction 1 As shown in. the accompanyingldrawings': Fig. 1 is aview,.partially: in=side elevation and partially in:section:, of-av circuit breaker constructed. 'n "accordance with my invention, and taken onthe line II'of. Fig. 2.

,Fig. .Zjis a view; partially in topjpla-n and,

partially 'ingse'ction, ofythe device ofFig; 11 Figs. .3 :and, 4 are plan and side elevational views, respectively, of the quenching fluid Figs; 5 andwG are :plan and side elevational views, respectively, of the: supporting frame work for the circuitinterrupter mechanism and the tanln 5 Figs. 7 and 8;are detail views of the toggle lever embodied inmy invention? I Fig. 9:is a; detail vievv'of iii-glevershown in'Fig-L,, v p

. Fig. 10 's aside elevational view-of across bar. and the lifting rods carried-thereby,

showing in end elevation, the movable con- Fig; 11 :is' a view of the lower portion :of Figbm taken at-right angles thereto.

I providea-supporting frame12" composed ofga base portion-1'3, bracingmembers 14; and bracket'members 15; i The bracket members 15'are' provided with-lug portions 16 by means 5 of Y which they are riveted to 13vand 14. All of .these members', are of' stamped metal. The members 14 are provided with holes 14a through which bolts may extend, to secure-the apparatus to aw panel-board or .wall.

*The base: portion '13 is provided with open:-

the main 'operat- PENNSYL NIA, AssIGnoE TO; 'WESTING BREAKER.

"1921. serial- Nu. 483,384:

secured to the base means of the bolts18 I and wing nuts 20. Ribs 21 are stamped intothe base member "13 m order to impart greater strength and rigidity. thereto. The member ing-s 17.to1 1eceive-bolts 18, that are carriedv by. a fluidt'quenching tank 19 The tank is 13isalso provided Withthree openings- 22, 1 through-\vlnch liit1ngrods23 .extend, and:

with openings 2 L throughi'which porcelain members 25 extend.

' The lifting rods 23 are preferably ofwood and at;theirquppervends areclamp'e'd between cross bars- 26, of peculiar form, by means of bolts 27. This manner of-holding'tlie rods is an improvement on the" former practice wherein a single perforated holding 1 member was provided into: which: the" end of the rod was inserted and the niatei'ial 1 then swaged inwardly. around the reduced .portion of: the

rod."' i 7 Besides effecting a more convenient" and secure connection between the holdingimem her and"? the rods,mypc'onstruction elim i nates; the: ,obj'ecti-onaltendency 1111 0116 former 1 tingo't theendsof their'odsn construction towardsthe breaking andisplit V a unit, through amain operating lever 28 that has pivotalronn'ec'tion at 29lnwith the cross bars26z.

: Each: of the 'rods- 23 carries, at its lower end, aibridgingmember 3O that-consists of two contact 1 ortions 3'1 clamped together as indicated in Fig} 11' and keyed to-rthe lifting rods 23 topr'eventrotation with;re'- spect theretok g] Pm.

The contact "faces 31 of the-bridgingmeme ber 30; are adaptedto make engagement with stationary contact-members 52 tl1ata're yieldinglysupported on conductors-33 which pass through the. 1porcelain members 25 "and are provided; at' their upper" ends-with termi nals-34n' ,H 1:". i The porcelain members -25 serve as insula torsia-rid as supportsfor the conductorsz33 and the; parts carriedi thereby. The. lower ends of the. porcelain members andthe coacting enlarged portions of theqconductors' 33 arelof semi-cylindrical form, in orderthat theporcelains and theconductor's will-'benonrotatable with: respect to i; each :other. 1 The stationary contact members 32-;are sup,- ported from :the conductorsr33ibyflflexi-ble members 3 5, and shunt connections 36 serve to conduct the current from contact members 32 to conductors 33. Leaf springs37 norable insulating materia mally force the contact members 32'toward each other, and into close engagemen'twith the movable contact members 31. By reason of the flexible mounting of thecontact members 32, they automatically align"themselves with the contact faces of the members 31.

The porcelain members are enlarged at their middle portions, as shown more clearly insulate the respective sets of contact memf bers from each other.

The tank 19 is'adapted to contain fluid for quenching arcs that may be formed during the operation of the circuit breaker.

The bolts 18 are secured to the corners of the tank, as shown in Figs. 3 and 4, by means of rivets 18a. This'construction eliminates the necessity of rivetingperforated blocks to the sidesofthe tank, for the purpose of supporting the bolts 18. p Y

' It will be understood that each of the three rods 23 carries at itslower end. a bridging jmember 30 that has contact membersv 31 adapted, at their opposite ends, to engage stationary contact members carried bytwo of the conductors 33, to complete a circuit across such conductors. It will be apparent that: the flared 'wallsof the openings in the base member 13 and the flared openingsin clamping plates 40are yielding and of such form, and co-actwith the enlarged vportions of the porcelains 25 in such manner, that any irregularities in engaging surfaces may be automatically compensatedv for and the porcelain thereby properly aligned and tightly embraced between the clamping members and I the base member. 5

the brackets 15 by 'a pin 'As the lever 28 The operating lever 28 is pivotally connected at 29 to the pair of cross bars 24, and at its 'oppositeend it' is pivotally supported on is'moved about its pivot 45, it raises and lowers the lifting rods 23 and the contact members 31 carried thereby, to. open and close the circuits. A'toggle lever 46,that=is pivotally supported on-the brackets 15 by a pin 47, pivotally supports a link 48 that is connected to the operating lever 28 by a pin 49. V i

An operating rod is connected to the toggle lever 46, by a pin 60, that extends through slots 61 in the brackets 15. As the operating rod is moved, motion is transmitted through the togglelever 46 and the link 48 to the operating lever 26. In the normal operation of late 40, in the manner shown in the device the operating rod 50 is moved upwardly to close the circuits inthe manner heretofore'described and locked in such position by any desired means. Upon release of the operating rod 50, a pair of tension springs 52, each of which has one end secured to'the pin49 and its other end secured to the pin 47,

serve to return the moving parts of the apparatus to open position and thereby break the circuits.

The toggle rated extensions 54,- 55, and 56 so that the operatingrod- 50 maybe operated from any desired direction. For instance, in the form illustrated herein, the link 48 and the rod 50 are connected to the extensions and ,56 respectively, whereas if it be found necessary to place the rod 50 in a horizontal position it may be connected to the extension 55' and the link 48 to the extension 54, while to operate milk 46 is provided with perfothe rod 50vdownwardly fromthe extension 56 v and from beneath the lower member 14, the

extension54could be connected to the link 48. If the range of movement of the rod 50 were limited, itcouldbe connected to the extension 55 and'the extension 54 connected to the link 48.

r Various changes detail and general ar rangement may be made without'departing from the spirit of the invention as shown in the accompanying claims.

Iclaim as my invention: a :7

1. In a circuit breaker, the combination of a pressedmetal supporting memberpro' videcl with openings therethrough,insulating members extending throughthe openings, means for attaching the'insulating members-to the supporting'member, means whereby the insulating and the supporting members are automatically aligned regard faces, conductor members disposed within the insulating membersand each provided with an enlarged portion adjacentto' one end of its associated insulating member, *the enlarged portion of the conductor'and the said end of the insulating member-being provided with cooperatlng engaging faces of such contour that the conductors are nonro-' tatable with respect to the, insulating mem bers. Y

less of irregularities on their engaging sur- 2. In combination, a stamped metal supporting member for circuit breakers provlded withan opening having flaring walls,

a conductor member extending through said opening and provided with an enlarged por tion adjacent thereto, a clamping member provided with an opening that has its walls flared oppositely to those of thesupporting member, and means for securing thesaid enlarged portion flared between the walls of said openings. Q: I

3.-In combinatioma stamped metal supporting member for circuit breakers,-provided with openings'having upwardly flaring Walls, conductor members extending through sald openings and provided with enlarged portions, perforated clamping members, the openings of which are provided with Walls flared oppositely to those of the supporting member, and 'means for securing the said enlarged portions between said oppositely disposed flared Walls of the supporting member and the perforated clamping members.

4. In combination, an insulating member, a second member mounted in the first named member and extending exteriorly thereof, and means for preventing the rotatable displacement between the said members comprising a semi-cylindrical surface on one end of said insulating member and a cooperating grooved surface on the other member.

5. In combination, a cylindrical insulating member, .a conducting member mounted in the first named member and extending exteriorly thereof, means for clamping the said member in a predetermined relative position,

and means for preventing therelative rotatable displacement of said members combushing'and insulating member, a conducting member movably mounted Within the cylindrical member and extending exteriorly thereof, and means for preventing rotatable movement between the cylindrical member and the conducting member comprising an extended surface on one of the" members and a. cooperatingindented surface on the other member.

In testimony whereof, I have hereunto subscribed my name this 24th day of June, 1921. a 1

ANDREW in BAKKEN.