US1851568A

US1851568A - of anderson

Info

Publication number: US1851568A
Authority: US
Publication date: 1932-03-29
Anticipated expiration: 1949-03-29

Description

March 29, 1932. s, JR 1,851,568

0 IRCUIT BREAKER LEVER Filed July 11. 1930 INVENTOR Marks Oauzs J- ATTORNEY fin Patented Mar. 29, 1932 r r I I 1,851,568

UNITED STATES PATENT OFFICE CHARLES I IALL DAVIS, JR., OF ANDERSON, INDIANA, ASSIGNOR 'lO DELGO-REMY CORPORATION, OF ANDERSON, INDIANA. A CORPORATION OF DELAWARE cmcorr BREAKER LnvER R E Application filed July 11, 1930. Serial No. 467,254.

This invention relates to ignition appaplan views respectively of a third form of ratus and particularly to improvements in circuit breaker lever. circuit breakers and the operating parts With particular reference to the drawings, ther of, indicates a housing, whichin the present a One object of the inventionis to provide s e, y e a ti er cup supporting a cira pivoted l ve havin lati l 111 cult breaker mounting plate 21, by cars 22 ertia of rotation so a to r vid i uit secured to the housing with attaching screws breaker that is apable. of high speed pera- 23 OI other preferred dBViCES. Adjustably 7 ti mounted on the plate 21 is a bracket 24 pivm A f th bj t f h i ti i t otally movable about a pivot post 25, through so vide a circuit breaker lever constructed from the g y of all Qccehtllc screw 26 retallled a minimum number of parts. by the plate 21 with its head disposed in a A further object of the invention is to pro- $1015 Q the bracket the bracket is vide a circuit breaker that is capable of manuheld 111 a(hushed P05113011 about h P facture from strip material, with the fewest 25 y means of p hg Screw 28 P j ibl number f Op'era tiong through a slot 29 and being threaded in the A f th bj t f th i ti i t plate 21. The plate 21 is centrally apertured vide means for securely retaining a pivot at W p h of a m 31 hi i a i it b k l maintained in driving relation upon a shaft Further objects and advantages of the pressplhdle 2, as 13 the usual shructurea ent invention will b apparent f th f and such as 1s des1red for the periodic operalowing description, reference being had to the tlonpf a Cult h accompanying drawings wherein a preferred y l hg mounted on the embodiment of one form of the present in- P P 29 cllcult breaker level ti i l l h w sembly 35 that is in cooperable engagement. I th dr i with the rotatablecam 31 provided by the Fig. 1 is a plan view of an ignition device shaft, and Pp i alternately p a including a preferred form of the instant inclose electrlcal cll'clhts 1- the devlce, ventioh and to transmlt the circuit functions to a ter- Fig. 2 is an enlarged View in side elevation mlnal P 36 Provlded by h hg In of an improved circuit breaker lever assembly. the h f 0f h lhstaht l h i Fig. 3 is a plan View f the assembly Seen the detalls thereof are illustrated in Figs. 1 in Fig 2. k to 8 nclusive, and are characterized 1n that Fig. 4 is a transverse sectional view, sub- 01mm? h level assembly stantially as illustrated by the line and arrows PnseS a chfcult breaker hive? 37 Qal'rylhg a 35 f Fig r contact point 38 for cooperation with a fixed Fig. 5 is a transverse sectional view sub pomt 33 on the/bracket rubbing blink sta-ntially as indicated by the line and arrows 39 cooperable Wlth h cam sl'for .actuatmg of Fig 2; V the lever 37, and havlng a leaf spring at- Fio 6 and Fig 7 are detailed Viewq of a tached thereto, which when secured within g block fmqming p of the (gircuit the housing 20 operates to oscillate the lever 37 with its pivot bushin 41 about the post 35 1 3 23 asselflbly m one of the 25 whereby circuits are alternately opened and closed through the

points

33 and 38. 45 8 1S slde eleYatlohal VleW of a The lever 37 is formed or otherwise fabricuitbreak r level P gdated from a piece of strip material, prefg 9 n 1 r slde elevatlcnal and pl n erably of steel or other hard metal to include views respectively of a modified form of cira longitudinal fold or doubling over along cuit breaker lever. v the medial line to form a rigid back as at 42, 50 Figs. 11 and 12 are: side elevational and and so as to provide contiguous laminations a means for attaching to the lever 37 the rubbing block 39 and one end of the circuit breakrubbing block Nil 550i the rubbing er lever urging spring 40, by illustratedin Figs. 3 and 4. At the pivoted end of the lever, the

laminations

43 and 44 are provided with sleeve-like flanges or

extensions

50 and 51 adapted to receive and retain the pivot bushing 41 hereinbefore, referred to, and which will be described in detail in'paragraphs that follow.

It will be observed in the form of the circuit breaker lever assembly illustrated in Figs. 1 to 8, that the

flanges

47 and 48, and the attached end of the spring 40 operates as clamping I embers between which one arm of the L-shaped rubbing block 39 is secured; and that the rivets 49 pressing against the attached end of the spring 40 and against the

flanges

47 and 48 operateas to clamp the spring and the flange to the block 39. This assembly provides a compact grouping of the elements ofthe structure, verse dimensions are reduced to a minimum, enabling the use of asmaller enclosing mechanism such as thecasing 20, or for an enlargement of such operating mechanism as the cam 31, and at the same time avoiding crowding of other parts of the structurenecessary and incident to the device and usually enclosed within the casing 20.

. To accomplish this compact formation, the 39 isespecially formed as is illustrated in Figs. 6 and 7, and the operating spring 40 is especially formed as is illustrated in Fig. 8. In the instance of the rubbing block, the attaching arm thereof is slit as at 55 to provide the

parallel portions

56 and 57 that carry apertures 58 and provide for a close coupling with the attaching

flanges

47 and 48 as will presently appear. The spring 40 is slit as at 60 for a portion of its length along its medial line so as to provide the substantially parallel extending

arms

61 and 62 provided with apertures 63. The slit block, as well as the slit 60 of the spring, receive the body of the lever 37 therein, as illustrated so thatthe

portions

56 and 57 of the rubbing block and the

arms

61 and 62 of the spring may over-lay a portion' of the arm and may be disposed behind the attaching

flanges

47 and 48 respectively. When the parts are thus disposed and proper- 1y aligned, they provide for the reception of the rivets 49 as' whereby thetrans the attaching rivets 49-,as has been described and as is illustrated in Fig 4.

As has been illustrated, the spring 40, after its attachment to the flanges'47 and 48, bends outwardly and is in substance wrapped about the pivot portion-of the lever where it engages the sleeve-

like flanges

50 and 51 secured about the pivot bushing, and thence terminates in an attaching portion 64 for making mechanical and electrical connection with the terminal screw., 36 as earlier described. Aside from forming bearing portions for the spring 40, the flanges 50 and 51'operate to receive a bushing 41 as earlier stated and also to firmly retain the bushing therein. When the bushing 41 is of dielectric material, then the lever 37 is well insulated The provi-' from its supporting structure. sions for the retention of the bushing within the

aligned sleeves

50 and 51 include peripheral grooves 65 and 66- about the bushing within which are disposed the

flanges

50 and 51 respectively after the bushing has been assembled therewith.

Flanges

50 and 51 are axially knurled on their inner periphery before bushing 41 is pressed therein to prevent 'bushingfrom rotating or oscillating with respect to

flanges

50 and 51. The means of retention is fully illustrated in the transverse sectional view of Fig. 5, and is accomplished by initially forming the

flanges

50 and 51 of cylindrical contour, and of suflicient size to allow the passage of the bushing 41 therethrough. After the bushing 41 has been properly placed within the sleeve-like flanges, it is retained therein by depressing the free edges-of the said flanges into the

recesses

65 and 66 by means of, a hollow tool or other instrument suitable for the purpose. This causes the edges of the flanges to seat within the

grooves

65 and 66, and the knurls of the sleeves to bite into the body of the bushing and prevent relative rotation.

A second form of circuit breaker assembly is illustrated in Figs. 9 andlO, and is essentially the same as the form just described in that-a rigid lever portion 37a is formed by folding the blank the preceding form, and providing the free edges thereof with the lugs 45 and'46 for supporting a contact 38, and the sleeve like

flanges

50 and 51 for mounting the pivot bushing 41. In the form illustrated in Figs. 9 and 10, the blank of material is' extended assembly, is of molded-form 39a and provides ,along the back 42 as in However, the rubbing block illus- 3711 retaining it an attaching portion 71 for disposition about or otherwise engaging the body of the lever thereon against movement in any desired manner. In practice two countersinks are provided to secure-moulded rubbing blocks on the arm, but apertures in the arm, or ribs will answer the same purpose.

A third form of circuit breaker lever assembly is illustrated in Figs. 11 and 12, and comprises essentially the same parts as illustrated in the first form with the possible exception of the final formation of the rubbing lockpreparing it for attachment to the attaching flanges. While the plan view illustrated in Fig. 12, is in detail slightly different. in configuration from the form illustrated in Fig. 3, the lever member 376 of the one form or the lever member 37 of the other form respectively may be inter-changed with each of the parts associated with the other without deviating from the invention herein disclosed. The essential difference between these two forms being in the manner and order of attaching the rubbing block and spring member to the levermemben- In the third form illustrated the laminations 43b and 44b are provided with, the flanges e5, 46 for mounting-of the contact, the flanges {$7, 48

' to which are secured the spring and the rubbing block 396, and the sleeve-like flanges 50 and '51 within which is secured the pivot bushing 41 as has been described in'each of the other formssubstantially as The rubbing block 39?) mounted upon the flanges 47, {18 need not be slitas in the instance of the first described form,'since the rubbing blockin this instance; is secured to and 48, tirely between the operating cam 31 and the attaching flanges carried by the lever. In this instance the spring 40 is slit as at and is assembled on the back side of the attaching flanges l7 and 48, being disposed in overlying relation with respect to the arm 37?; described in the preferred form, retention of the rubbing, block and spring in firmrelation with the

flanges

47 and 48 being obtained by the rivets 49 as has been elsewhere described. This forms a circuit breaker lever assembly of greater transverse magnitude than that the first form, and one that is adaptable tocertain forms of construction that would the use of a form as illustrated in Figs. 1 to 8 inclusive.

It will be observed by the above disclosure, that a circuit breaker lever assembly has been provided that is of light weight, that is of rigid construction and that is easy of manufacture, requiring a minimum of constructional operations. The result is the production of a circuit breaker lever assembly for high speed operation that is highly eflicient and that can be produced at relatively low with oppositely extending, integral located in the not necessitate cost. The pivot bushing is securely retained within the arm in a manner that securely insulates the lever upon its supporting structure an properly spaces the same therefrom.- The bushing cannot work loosefrom the arm and this eleminates the wear usually attendant upon the portions of this structure that ordinarily give rise to inaccurate timing of ignition due to lost-motion occurringfrom the wear. All of this produces quieter operation and event of any fault arising in the lever assembly, the entire unit may be replaced with a new one operating in perfect order'at an inconsequental cost. lVhile the form of embodiment of the present invention as herein disclosed, constitutes a preferred form, it other forms might be adopted, all coming within the scope of the claims which follow.

lVhat is claimed is as follows:

higher speed operation. In the is to be understood that l. A circuit breaker lever comprising, in

comprising, in plates located axis of oscillathe lever and provided respectively flanges same plane parallel to the axis of the lever, a rubbing block secured to both attaching flanges 4L flanges, a bearing carried by the plates, and

a contact secured to both plates.

circuit breaker lever comprising, in

combination, two juxtaposed plates located in planes at right angles tothe axis of oscillation of the lever and provided respectively with oppositely extending, integral flanges located in the same plane parallelto' the axis of the lever, a rubbing block secured flanges, a bearing carried by the plates, and a contact secured to both plates.

4. A circuit breaker lever comprising, in

combination, two juxtaposed plateslocated inplanes at right angles to the axis of oscillation of the lever and provided respectively with oppositely extending, integral flanges located in the same plane parallel to the axis of the lever and provided respectively with opositely extending integral annular flanges surrounding aligned holes, a bushing retained within both annular flanges, a rubbing block secured to both plates, a contact secured to both plane flanges of the plates, and a rubbing block secured to the plates.

5. A circuit breaker lever comprising, in combination, two juxtaposed plates located in planes at right angles to the axis of oscillato both a leaf spring secured to both flanges,

tion

flanges, each pair of flanges being in a plane parallel to the axis of the lever, a rubbing block secured to one pair of said flanges, a contact secured to an other pair of said flanges, and a bearing carried by said plates. 7

6. A circuit breakerlever comprising, in combination, two juxtaposed plates located in planes at right angles to the axis of oscillation of the lever andprovided respectively with pairs of oppositely extending, integral flanges, each pair of flanges being in a plane parallel to the axis of thelever, and provided respectively with opposltely extending, integral annular flanges surrounding aligned holes, a bushing retained within both annular flanges, a rubbing block secured to one pair of plane flanges, and a contact secured to another pair of plane flanges.

7. In an ignition device, a circuit breaker lever formed from strip material to provide 'a contact supporting lever of laminated form, flanges providedat one end of said lever and supporting a contact point, means intermediate the ends of said lever and a rubbing block secured thereto, sleeve like flanges disposed at the other end of said le-. ver,.a bushing disposed therein, said bushing providing recesses receiving said flanges, and means for urging the lever for rotation about the axis of the bushing.

8. In an ignition device, a circuit breaker lever formed from strip material to provide a contact supporting lever of laminated form, a contact, a rubbing block and a leaf spring secured to said lever, and oppositely extending sleeve-like flanges coaxially disposed near one end of said lever, and a bushing secured within the sleeve-like members with the terminating edges of said sleeves received by annular grooves provided by said bushing.

9. In an ignition device, a circuit breaker lever therefor, comprising in combination, sleeve-like flanges provided at one end thereof, a bushing disposed within saidlflanges recesses, the terminating and provided with edge of said flanges being depressed into said recesses for securing the bushing to the lever.

10. A laminated circuit breaker lever comprising in combination, a pair of contiguous laminations carrying'right and left hand" flanges respectivelyfsaid laminations being secured together sets or pairs, said lever'providing apair of flanges at each end thereof and a third pair intermediate its ends, a contact point secured to the flanges at one pivot bushing secured to the flanges at the opposite end thereof, a rubbing block and a leaf spring both secured to the intermediate pair of said flanges.

l 11. A circuit breaker lever comprising a single sheet metal stamping shaped so as to of the lever and provided respectively with pairs of oppositely extending, integral of-flanges being in a end of the lever and a provide two juxtaposed plates located in planes at right angles to the axis of oscillation of-the lever and provided, respectively, with oppositely extending, integral, annular flanges surrounding aligned holes, a bushing retained within both annular flanges,a rubbing block secured to both plates, and a contact secured to both plates.

12. circuit breaker lever comprising a single sheet metal stamping shaped so as to provide two juxtaposed plates located in planes at right angles to the axis of oscillation of the lever and provided, respectively, with oppositely extending, integral, annular flanges surrounding aligned holes, and shaped so as to provlde a leaf spring portion integral with said plates, a bushing retained within both annular flanges, a rubbing block secured to both plates, and a contact secured to both plates.

13. A circuit breakerlever comprising a metal stamping shaped so as to provide two juxtaposed plates located in planes at right angles to the axis of oscillation of the lever and-provided,respectively, with oppositely extending, integral, annular flanges surrounding aligned holes, and shaped so as to provide oppositely extending,

single sheet integral flanges located in the same plane,

parallel to the axis of the lever, a bushing retained within both annular flanges, a rubbing block secured to both plane flanges, and a contact secured to both plates.

14. A- circuit breaker single sheet metal stamping shaped so as to provide two juxtaposed plates located in planes at right angles to the axis of oscillation of the lever and provided, respectively, with oppositely extending, integral, annular flanges v surrounding aligned holes, and shaped so as to provide two pairs of oppositely extending, integral flanges, each pair plane at right angles to lever comprising a the axis of the lever, a bushing retained within both annular flanges, a rubbing block secured to one pair of plane flanges, and a contact secured to the other pair of plane flanges. y v

In testimony whereof I hereto afiix my signature.

:CHARLES HALLDAVIS, Ju. I

to present the flanges in