US1323888A - Brush-holder - Google Patents

Description

S. C. MCKEOWN.

BRUSH HLDER.

APPucATloN FILED MAY|.1919.

1,323,888. Patented Deo. 2,1919.

INVENTURA/ jF/MUEL EM: EDN

BY MW A TTORNE narran srnrns PATENT onnion.

SAMUEL C. MGKEOWN, OF EAST CRiNGE, NEVI JERSEY, ASSIGNOR TO SPLITDORF ELECTRICAL GOMA-TY, OF NEWARK, NEW JERSEY.

BRUSH-HOLDER.

1,323,888. Original application filed September 25,

To all Lc/wm, t may] concern:

Be it known that I, SAMUEL C. MCKnowN, a citizen of the United States, and resident of East Orange, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Brush- Holders, of which the following is a specili- 'cation My invention relates to brush holders for electrical apparatus used in connection with ignition systems for internal combustion engines.

My inventionl is particularly adapted for use in connection with a magneto used 'for the purpose of producing and distributing sparking current to the sparking devices located in the various engine cylinders. Magnetos used for this purpose usually have a distributer block which carries the contacts to which the spark plug wires are attached; at the same time the block acts as a housing for the distributing finger which serves as a medium for conducting current from the secondaryY of the high tension coil to the various distributer points by way of a distributer brush carried by the distributing disk or linger. Y

In order that the brush carried by the rotating distributing finger may be kept in its proper working position a spring of some kind is utilized to continually force the brush outward from its retainer and when the block is removed for any purpose whatsoever, the distributer brush will pop out of its retainer unless restrained by some means.

One of the objects of my invention is to provide a brush holder which has a restraining means suitable for retaining the brush in the holder when the distributer block has been removed. i

Another object of my invention is to provide a retainer which will serve as a means for withdrawing the brush from the holder itself whereby damage to the brush and its operating spring is reduced to a minimum. That is to say, the retainer acts as a protector for the brush and spring.

These and other objects will be apparent to one skilled in the art after a study of this specification in connection with the drawing, in which- Figure 1 is a fragmentary sectional View of a portion of a dstrbuter block with the Specification of Letters Patent.

Patented Deo. 2, 1919.

1917, Serial No. 193,119. Divided and this application filed May 1,

1919. Serial No. 294,067.

distributing finger and means for driving the same.

Fig. 2shows the brush holder and retainer partly withdrawn from the holder.

Referring now particularly to the details, 1 is a portion of the end plate of a magneto within which is mounted a ball bearing 2 that carries a distributer gear 3. Gear 3 is driven in the usual way from the pinion 'on the armature or rotor of the magneto but since vthis is all old and well understood and forms no part of my invention further description of this part of the-magneto does not appear necessary. The sleeve 4 to which the gear 3 is attached carries an insulating linger 5 having a stem 6 in which is molded a metal insert 7, which carries a brush 8 for purpose of collecting the high tension current from any suitable connecting device. Preferably molded integrally with the finger 5 is a brush holder 9 adapted to carry a retainer 10. The retainer 10 is indented along one side at 11 which indentation serves as a guide for the brush 12 which has a groove 13 to coact with the guide 11. The brush. holder 9 also has an indentation 14 that matches with indentation 11 of the retainer so that the retainer 10 is guided in the brush holder 9. The bottom part of the retainer 1() has an indentation 16 which acts to form a seat for the spring 18, the upper end of which is held in operative relationship with the brush 12 by a projection 15. The spring 18 serves to hold the brush 12 in a position'such that the shoulder 17 is always engaged by the hook 24 formed on one side of the retainer 10. This side has a slight set at 25 so that when the retainer is withdrawn from the holder the hook 24 will spring outward as shown in Fig. 2 whereby the brush 12 may be readily withdrawn from the retainer. By this construction the brush, retainer and holder have grooves and guideways similar to that shown in my (zo-pending application S. N. 193,119, filed September 25, 1917, of which this application is a division.

As shown in Fig. 1 the spring 18 holds the brush 12 in normalworking position, in which the end of the brush 12 runs against the pathway of the distributer block 19 in which are molded a number of inserts 20 corresponding to the number of engine cylinders required to be served by the magneto. The Wires running from the distributer block 19 to the engine cylinders are connected to the contacts 20 b means of the openings 21 and screws passmg through the threaded holes 22. The distributer block 19, as shown, has other Contact points 23 but since these form no part of my present invention they are not further described herein.

It Will be understood that numerous changes may be made in the details of my invention Without de arting from the spirit of my invention an the scope of the appended claims.

Having thus described my invention what I claim is 1. In a device of the class described, a brush having a shouldered portion and a channel therein, a retainer for the brush and having a guide adapted to cooperate with the channel, a holder for the retainer and having a guide therefor, a spring supported in the retainer for moving the brush outward as the same Wears, said retainer having a hook-shaped member adapted to be brought into the path of movement of the shouldered portion of the brush to limit its outward movement, when the retainer is inserted all the way into the holder as described.

2. In a device of the class described a brush having a shouldered portion and a channel therein, a retainer for the brush and having a guide adapted to coperate with the channel, a holder for the retainer and having a guide therefor, a spring supported in the retainer for moving the brush outward as the same Wears, said retainer havin a resilient portion terminating in a hoo adapted to engage, when the retainer is in Working position in the holder, the shouldered portion of the brush to limit its outward movement, as described.

In Witness whereof I afiix my signature.

SAMUEL C. MCKEOWN.

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