US2025191A - Circuit breaker lever - Google Patents

Description

ec. 24, 1935. Q Hl DAVIS, JR UZSQ CIRCUIT BREAKER LEVER Filed April 21, 1932 Patented Dec. 24, 1935 UNITED STATES PATENT QFFIQE CIRCUIT BREAKER LEVER Application April 21, 1932, Serial No. 606,663

Claims.

This invention relates to ignition timers for internal combustion engines.

One of its objects is to provide an ignition timer which will operate satisfactorily at very 5 high speed.

This and other objects of the invention are accomplished by providing a circuit breaker lever of extreme rigid and light weight construction. In a Reissue Patent Number 19,083 issued Feblo ruary 13, 1934 there is provided a very light weight, rigid lever by folding over a thin metal sheet so as to form a double thickness of the material. Each thickness is provided with means for attaching the lever to a hub by which the lever is journaled upon a support, with means for attaching a rubbing block and with means for attaching a Contact. In the present form of the invention a sheet of the metal is not doubled over but forms the lever oi separate pieces in a manner which will be apparent from the following description.

Further objects and advantages of the present invention will be apparent .from the following description, reference being had to the accompanying drawing, wherein a preferred embodiment of one form of the present invention is clearly shown.

In the drawing: Fig. 1 is a plan view of an ignition timer having a circuit breaker lever embodying the present invention.

Fig. 2 is a side view of the circuit breaker lever drawn twice the size as shown in Fig. 1.

Fig. 3 is a view in the direction oi" the arrow 3 of Fig. 2.

Fig. 4 is a sectional view on the line 4 4 of Fig. 2.

Fig. 5 is a view of the spring looking in the direction of the arrow 5 of Fig. 3.

Fig. 6 is a sectional view on the line 6--6 of Fig. 3.

Fig. '7 is a View oi the rubbing block looking in the direction of the arrow 1 of Fig. 3.

r Fig. 8 is a view looking in the direction oi the arrow 8 of Fig. '7.

Referring. to Fig. 1, the ignition timer includes a housing 2t supporting a plate 2l carrying a pivot post 22 upon which are pivoted a stationary contact bracket 23 and the circuit breaker lever 2d embodying the present invention. The lever 2d comprises two sheet metal parts 30 and 3l, which are alike, except that one is punched right hand and the other left hand, so as to provide the members 30 and 3| respectively with ianges 32 and 33 surrounding (Cl. 20G-30) holes which are brought into alignment and through which a nonconducting bushing 34 may extend.

The parts 36 and 3! provide oppositely extending ears 36 and 31, respectively, which are pro- 5 vided with holes for receiving rivets 38 and 3.9, respectively, which also pass through holes lli] and Al, respectively, in a rubbing block 42 of non-conducting material and through holes li and l5 respectively provided by a leaf spring lo conductor 16. Thus the rivets 33 and 39 secure to the ears 36 and 3'.' the rubbing block l2 and the spring The rubbing block 42 is provided with a slit [i3 to enable the rubbing block 42 to straddle the two pieces 3B and 3 i, and the spring 1.3 d is also provided with a slit i? to permit the spring to straddle the pieces 3i) and 3l. Thus the rubbing block 42 and the spring 46, being attached by the rivets 38 and 33, secure the lever parts 3B and 3! together at a point inter- 20 mediate the ends of the lever.

The lever parts 3i) and 3i are provided with oppositely extending ears 5S and E! respectively which together provide a plane surface for receiving a contact 52 attached to the ears pref- 25 erabiy by welding.

The circuit breaker though light in weight is extremely rigid due to the fact that the two thin sheets of metal Sii and 3l are tied together at their ends and at an intermediate point. The 30 contact 52 ties the two parts together at the free end of the lever where the contact is joined to the ears 5S and 5i. The other or pivoted end of the lever parts 33 and 3i are joined together by the bushing 3e which is xed in position by deforming the flanges 3e and 32 in the grooves 32a and 33a, provided by the bushing 313. As stated before, the rubbing block 62 ties the lever parts 3i! and 3l together at an intermediate portion through the connection between the 4 rubbing block L32 and the ears 3% and 31.

Since the circuit breaker level1 24 can be made very rigid by this construction it is apparent that very thin metal can be employed for its con- 4 struction, thereby reducing the polar inertia of J the circuit breaker lever to a very low value. In this way the circuit breaker will operate at extremely high speed without chattering due to the rebounding of the contact 52 from a stationary contact 6i! carried by the stationary con- 00 tact bracket 23.

The spring 46 is attached to an insulated terminal 'le carried by the housing 2B and serves to conduct current from said terminal to the contact 52 as well as to urge the rubbing block 42 forms might be adopted, all coming. within the scope of the claims which follow.

What is claimed is as follows.

l. A circuit breaker lever comprising two sheetY metal stampings so shaped that, when the stampings are juxtaposed, two aligned, oppositely extending, annular flanges are provided; a bushing extending through both flanges; an electrical contact attached to ears projecting from the stampings; and a rubbing block attached to the stampings.

2. A circuit breaker lever comprising two sheet metal stampings so shaped that, when the stampings are juxtaposed, two oppositely extending flanges are provided which lie in the same plane parallel to the axis of the lever; an electrical contact attached to both anges; a rubbing block attached to anges projecting from the stampings; and a bearing bushing extending through an opening provided by the stampings.

3. A circuit breaker lever comprising two sheet metal stampings so shaped that, when the stampings are juxtaposed, there are provided two aligned, oppositely extending, annular anges, and two plane anges extending oppositely and located in the same plane parallel to the axis of the lever; a bushing extending through both annular iianges; a rubbing block attached to both plane ilanges; and an electrical contact attached to parts projecting Vfrom both stampings.

4. A circuit breaker lever comprising two sheet metal stampings so shaped that, when the stampings are juxtaposed, there are provided two pairs of oppositely extending, plane anges, each pair lying in a plane parallel to the axis of the lever; a rubbing block attached to one pair of plane anges; an electrical Contact attached to another pair of plane flanges; and a bearing bushing attached to tubular means projecting from both stampings.

5. A circuit breaker lever comprising two sheet metal stampings so shaped that, when the stampings are juxtaposed there are provided two pairs of oppositely extending, plane flanges, each pair lying in a plane parallel to the axis of the lever and two aligned, oppositely extending, annular flanges; a rubbing block attached to one pair of plane flanges; an electrical contact attached to another pair of plane ilanges; and a bearing bushing extending into the annular iianges.

6. A circuit breaker lever comprising two sheet 'metal stampings so shaped that, when the stampings are juxtaposed, two oppositely extending flanges are provided which lie in the same plane parallel to the axis of the lever; a rubbing block and a leaf spring conductor attached to both flanges; an electrical contact attached to parts v extending from the stampings, and a bearing bushing attached to tubular means projecting from the stampings.

7. A circuit breaker levercomprising two sheet metal stampings so shaped that, when the ductor attached to one pair of plane anges; anV

electrical Contact attached to another pair of plane lianges; and a bearing bushing attached to both stampings.

8. A vcircuit breaker lever comprising, in com-Y bination; a plurality of juxtaposed flat plates; a Contact secured to one or more of theplates; a rubbing block attached to one or more of the plates; a pivot member passing through all of the plates; and means including portions of the plates for attaching the pivot member to the plates whereby the pivot member ties the plates together.

9. A circuit breaker lever comprising, in combination; a plurality of superposed plates; a contact and a rubbing block attached to the plates; a pivot member passing through the p-lates; and annular flanges integral with the plates. and extending laterally therefrom in opposite directions and tightly fitting around the pivot member whereby said pivot member holds the plates together.

l0. A circuit breaker lever comprising, in combination; a plurality of flat plates; apivot member and a contact carried by the plates; a leaf spring and an L-shaped rubbing block both extending laterally beyond the outer sides of the plates, one leg of said rubbing block providing a cam-engaging surface at one end thereof, and the other leg of the rubbing block being notched to receive the plates; ilanges extending from the plates and at substantially right angles to the plane of the plates; and means for securing the notched leg and one end of the leaf spring to the ilanges oi' the plates to hold all of the plates together.

JOHN T. FITZSIMMONS, Administrator of the Estate of Charles H Davis,

Jr., Deceased.

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