US930155A - Circuit-breaker. - Google Patents

Description

H. W. CHENEY.

IRUIT BREAKER.

APPLIOATION IILBD 0012.22, 1906.4

Patented Aug; 3, 1909.

4 SHEETS-SHEET 1.

H. W. CHENEY.

GIRCUIT BRBAKER.

APPLIUATION FILED 00T. 22, 1906.

. 930,155. l Patented Aug-3,1909.

4 SHEETS-SHEET 2.'

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' l. @Mm/nug- H. W. CHENEY.

` CIRCUIT BREAKBR. APPLICATION FILED 001:22, 1906.

' 930,155. Patented Aug. 3, 1909.

- 4 SHEETS-SHEET 3,

Patented Aug. 3, 1909. 4 SHEETS-SHBET 4.

H. W. CHENEY.

CIRCUIT BRBAKEB.. ArPLIuATIoN FILED 90122, 190s.

w Q @Fm @www f y Mummg 'such construction that the contact members is provided with a supporting frame or'castit .istobe understood that myswitch is not tion, reference is UNrTnD STATES PATENT 4onirica.

HERBERT W. CHENEYJOF NORWOOD, OHIO, ASSIGNOR 'lO ALLIS-CHALMERS COMPANY, A. CORPORATION'OF NEW JERSEY, AND THE BULLOCK ELECTRIC MANUFACTURING COM.-

PANY, A CORPORATION OF OHIO.

CIBCUIT-BREAKER.

vSpecification of Letters Patent.

.Patented Aug. 3, 1909.

Application led October 22, 1906. Serial N0. 339,907. 'A

To all whom t may concern:

Be it known that I, HERBERT W. CHENEY, citizen of the United States, residing at N or` wood, in the county' of Hamilton and State of Ohio, have invented certain new and,- useful Im rovements in Circuit-Breakers, of which t e following is a full, clear, and exact speciiication.

My invention relates to oil switches or circuit-breakers. y i

One of the objects of my invention isto provide a switch which is compact, simple in constructionyand suitable for circuits of high voltage and large amperage, f

A further object isvto provide aswitch of can be easily removed in case repairs lare necessary.

For a better 'understanding of my invenhad to the accompanying drawings in whic t Figure 1 is a vlongitudinal section of the switch showing theL-same attached tol the switch-board; Fig. 2 is a similarviewr oi' the switch taken from'th'e opposite side to that shown in Fig. 1 Fig. 3 is a transversefsection Fig. i is a partial bottom view showing the arrangements of the contact-s Fig. 5 is a'partial'horizontal sectional viewof the switchA showing a portion of the switchoperating mechanism, the section being taken a )proximately along the line 55 of Fig. 1 looking in the direction of the arrows; and Fig. 6 is. a horizontal section approximately along the line 6-6 of Fig. 5.

. Referring now to the figures of th e drawing, 10 represents a switch anel, to the rear of which the switch is attacliled. Theswitch ing 11 consisting of a horizontal portion 12 and downwardly extending side and endportions 13. The casting is provided `with forwardly extending lugs or brackets' 14 through which bolts 14 pass which secure'the switchto the switch'panel. l

@I have here shown a three-,pole switch but limited ftoA aswitch of this 'specific number of f poles.' `The horizontal portion of the frame orcasting is provided in thiscasefwith three pairs ofA tern1inal..openings' which are'sta'g# gered and arranged alternateluadjacent thev opposite sides of theirairor casting. Le# cated in the terminal-openings are porcelain bushings 15 adapte-d to receive terminal rods 16 and 16a surrounded by insulatin leeves 17 and 17a. It will be seen that tgre are for each pole one terminal 4rod I6 and one terminal rod 16a located on opposite sides of lthe switch.

At 18 is shown a bar made of some insulating material such as wood, which par supports in this caser three pairs of stations. switch contacts. 'The bar extends longltudinally of the switch at ri ht angles to the switch panel, being secure at its ends by screws 19 to projections or ridges 20 on the downwardly extending portions 13 of the switch casting 11. The terminal rods 16a extend straight vdown from the bushings through the bar 18, and the terminal rods 16 are bent or curved towardy the terminal rods 16a and likewise ass through the bar 18.` The openings intlie bar 18 for the terminal rods 16 are out of alinement with the o enings for the terminal rods 16a. tlfxris arrangement greater leakage surface is provided between the live parts of each pole than would be provided if all the terminal rods were in alinement at the-bar 18. Connected to 'the lower ends of terminal rods 16 are contact members 21 each consisting of a contact base 22, 'a spring contact finger 23 secured thereto by one or more screws 24, and a contacttip or face 25 secured to the end of the lc'ontact vfinger. Connected to the lower ends of the terminalrods 16a are contact members 21a each consisting of a contact base 22, a spring contact finger 23a secured thereto by one'or more screws 24., and acontact face or ti 25a secured to the outer end ofthe contact nger. The lower ends of the'contact bases 22 and 22 extend toward each otherand the lower faces to which the spring contact lingers 23 and 23 are secured are in valinement with one another. The contact iingers 23 and 23a are of lthe same length so that the contact` tips 25 and 25a are also inalinement withone another. vEach contactrod is provided with a nut 26 located ina recess inthe top face of the sup orting bar. Preferablythe upperendsof t 1e contact'bases are located in recesses in the lower face of the bar Aand are preventedfromV turning by one or more dowel-pins 27. 4

At 28 is shown a rotaryswitch member l of the bar for drawing the contact bases tightly against the lower" With ' 'consisting 0faspindle 29 and three U-shaped and 16a.

bridging contact members 30, (see Figs. 2 and 3) which are clamped to the spindle 29, insylation 81 being interposed between the contact members andthe spindle. The portion of the spindle to which the bridging conby screws 36 passing through perforated ears" 37. Each casting 32 is also rovided on each side with a projection 38 be owthe shaft, in which the upper ends of the contact rods 34 are secured. The contact rods-34 are surrounded by insulating sleeves 34EL which prevent the arcs from traveling upward on the rods when the switch is opened.

It is seen that the rotary switch member is located at one side of all the contact rods 16 I so mount the rotary switch member that it can be easily removed from the switch after the tank has been removed. In this case the downwardly extending end portions of the casting 12 are each provided with a rib 39 which is preferably faced off on the side o posite'the contact rods.' Bolted to the si( e of this rib or ridge 39 are the two bearings 40- and 41 for the rotary spindle. The bearing 41 extends outward toward the switch-board and is provided 'beyond the tank with a lug 42 having at its outer enda projection 42u which extends at right angles to the switch-board. A bell-crank lever 43 Y is mounted on a pin or spindle between the The bell-jl bearing 41 and projections 42, crank ever is provided with an upwardly extending arm'44 and with anarm 45 which engages a weightedl lever 46 which is secured to the outer end of the spindle 29. The bell- Icrank lever is adapted .to be operated either manually or automatically by any suitable mechanism. The operating mechanism vforms no art of .the present invention and further escription and illustration I are thought to be unnecessary. Thus it is seen, thatto remove the rotary switch member and the parts carried thereby, all that is necessary is to iirstremove the oil tank'and then loosen the bolts which secure the bearing 40 and 41 to the casting.

ach pole of the switch is-separat'd from the adjacent .pole and from the ends of the oil tank by vertical insulating barriers 47, and the contacts of each pole are further separated fromfeach other by short vertical'barriers 48. The barriers 47 are preferably secured to the u per art of the casting 12by screws 49, eac of t e barriers having a reby Letters Patent is cesse-d portion which receives splindle 29. The barriers 48 are provided wit notched portions which it closely around the insulating bar 18 and are preferably carried by bars or rods 50 in the bottom of the tank so as to .f

Thereis vno danger of communication of anI arc from'one pole to another or leakage between the dierentparts of the samevpole. Furthermore the particular arrangement of the poles of the switch permits a switch of any number of poles to be attached to a narrow switch-board panel.

I do not wish to be confined to the exact ,details shown butfairnin my claims to cover all modifications which do not involve a departure from the spirit and. scope oi my invention. What I claim as new and desire to secure 1. In a switch or circuitbreaker, a frame or casting, a set of terminal rods extending lthrough said frame or casting, an insulating support, stationary contact members carried thereby and arranged in a line, a movable switch member, a contact member carried thereby and adapted to engage the said stationary contact members, said terminall rods enterin said insulating bar atA oints out of line wit each 'other so that a ong leakage surface is provided.

2`. In a multipole switch or circuitbreaker, a frame or casting, an insulating support, a plurality ofsets of stationar contacts carried thereby, said contacts eing arranged in a line, a plurality of contact rods connected to said contacts, 4said rods passing through both said insulating support and frame or castingat points which arestaggered or out of alinement so that long leak age surfaces are provided. 3. In an oilvswitch or circuit-breaker, a frame or casting having downwardly extending sides, movable andstationary insulating sup orts mounted in said downwardly exten ing sides, contacts carried by said supports, the contacts of each of said su ports being arranged in a line, -terminal ro s connected to the stationary contacts and passing through both said stationary insulating support and frame or casting at points which are staggered out of line with one another.

4.*In combination, a switch panel, an oil switch on the rear side thereof, said switch comprising a frame secured to the panel and.

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. to said drum and extending downward portions of the frame at right-angles to the having an upper horizontal portion and dmvnwardly extendingside port-ions, an'oil rece )tac-le detachably secured to said frame; the horizontal portion of the latter forming al cover ioiuthe receptacle, a movable switch member comprising an oscillatory drum mounted in the downwardly extending side g portions of the frame'at'right-angles to the panel, one end ofthe drum extending beyond the receptacle, a plurality of contacts secured therefrom, a stationary switch member comprising a bar secured to the lownwardly extending side portions of thii frame and located below and at one side )f the drum, a plurality ol' contacts carried by said bar and extending laterally therefrom below the drum in a position to be engaged by the contacts on the drum, and termlnal conductors connected to the last named contacts and extending upwardly through the horizontal portion of the frame.

5. In combination, aswitch panel, an oibi switch on the rear side thereof, said switch comprising a frame secured to -thc pu el and l having an upper horizontal portion and downwardlyextending side portions, an oil rece tacle detachably secured to said frame, the iorizontal portion of the latter forming u. cover for the receptacle, a movable switch member comprising an oscillatory drum mounted in the downwardly :extending side panel, one end of the drum extending beyond the receptacle, a plurality of bridging con tact members carried by thedrum, each of said members comprising a pair of downwardly extendin contact arms or rods having contacts at t eir free ends, a stationary switch Imember comprisimr an insulating bar secured to the downwardly extending side portions oi' the frame and located below and at one side of thc drum, a plurality of pairs of contact members carried by said-bar, said members having contact fingers extending laterally, thc free ends of said fingers having contact adapted to be engaged by the contacts of the bridging contact members, and

terminal conductors connected to the' stai ti'onary contact members and passing upwardly through the horizontal portionof the frame. v

6. In an oil switch, a frame, an oil tank secured to the frame, a plurality of stationary contacts supported within the tank, an oscillatory switcli member comprising a drum journaled in t. 1e frame, a plurality of bridg-- mg contact members. secured to the drum, each bridging contact membervcom rising two parts surrounding the drum, sai parts having outwardly extendin ears, screws passing through said ears an clamping said parts to the drum, a pair of contact arms or rods secured' to one of said parts, saidcontact arms or rods having at' their free ends contacts adapted tol engage the stationary contacts.

7 In a switch or circuit breaker, a frame, a plurality of terminal conductors extending through said frame adjacent opposite sides of the latter, an insulating su portingrmember secured to said frame, sai terminal con# lductors )assing through said member at points w ich are staggered or out of lme, so

as to provide long lea age surfaces betweenV said terminal conductors, contacts air the lower ends of said conductors having con-- tact fingers arranged in line, and an oscillatory switch member arranged at one. side of said supportin member, said oscillatory switch member aving brid 'ng contacts adapted to engage the'contact gers. A

8. Ina switch or circuit-breaker,a frame or casting, a plurality of stationary contacts, terminal conductors connected thereto, an oscillatory switch member com rising 'a support journaled in said frame and aving bridging contacts adapted to enga e the stationary contacts, each of said bri ging contacts comprisingapair of members 'clamped together about said support and a pair of v downwardly extend'inv members secured to one of said members c amped about the suport. p In testimony whereof I affix my signature, in the presence of two witnesses.

HERBERT W. CHENEY. Witnesses:

ARTHUR F. Kwis, 'FRED J. KINsEY.

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