US1347590A - Electrical connector - Google Patents

Description

APPLICATION FILED NOV-19,1917- Patented July 27, 1920;

W W M.

UNITED STATES PATENT 'oFFlcE.

MAXWELL w. nonnn'rson, or BELLE HARBOR, NEW YORK, AssIeNon To GODFREY r. scrnvun'r.

ELECTRICAL CONNECTOR.

Specification of Letters Patent.

Patented July 27, 1920.

Application filed November 19, 1917. Serial No. 202,736.

To all whom it may concern:

Be it known that I, MAXWELL V. ROBERT- SON, a citizen of the United States, residing at Belle Harbor, L. 1., in the county of Queens and State of New York, have invented certain new and useful Improvements in Electrical Connectors, of which the following is a specification, reference being had therein to the accompanying drawing.

My invention relates to improvements in electrical connectors and has particular reference to and is illustrated in the accompanying drawings in its application to a connector adapted for use upon the brush of an electrical machine such as a dynamo or motor. It is of the utmost importance in connections of this kind to provide good electrical contact in order to insure ample conductivity for the transmission of current through the connection.

In the accompanying drawings, I have illustrated in Figure 1 in perspective, a carbon brush and double connector embodying an application of my invention. Fig. 2 is a similar view showing a single connector. Fig. 3 is a perspective view partly broken away illustrating one method of forming the end of the flexible member ot' the connector. Fig. 4 is a perspective view partly broken away illustrating the construction of the carbon brush, and Fig. 5 is a perspective View illustrating one of the parts of the connector.

6 indicates the lower part of the carbon brush which is adapted to rest upon the commutator of the machine and 7 the upper part which is preferably electroplated. One side oi the upper part is recessed to receive the L-shaped member 8 as shown in Fig. 2, the upper part 9 of the L-shaped member extending over the top of the carbon brush as shown. The other side of the carbon brush is cut away as indicated at 10-10 and a hole is drilled through the brush as indicated at 11.

The end of the flexible member such as illustrated in Fig. 3 is terminated in a loop which is crushed fiat to seat within the round recess 10 of the brush and this loop when crushed being rectangular in cross- 5 section engages all sides of said recess thereby making good contact therewith. After the end of the flexible member has been introduced, the screw 12 is pushed through and engages the tapped hole 13 of the locking member 14 which thereupon presses the compressed loop 15 of the flexible member shown in Fig. 3 tightly within the hole 10, and it will be observed that the offset 14: of the locking member 14L engages the cut-away portion 10 of the carbon brush thereby extending the contact surfaces while at the same time preventing the locking member 14: from turning when. the screw 12 is turned down tight.

In the modification shown in Fig. 1, instead of forming a. loop at the end of the flexible member shown in Fig. 3, the flexible member 15 is bent in the center being crushed flat to form the loop for engagement beneath the locking member 14.

The free ends of the flexible members are also preferably'retained within clips such as 16-17, the former being for a single fleXi-' ble connection as shown in Fig. 2 and the latter "for a double connection as shown in Fig. 1. By having the flexible member enter the clip 16-17 at right angles to the direction of the slot 18 thereof, the waist or shank of the clip is wider and stronger and the loop of the clip surrounding the end of the terminal is naturally of greater depth, thus insuring not only better electrical connection but increased mechanical strength.

By constructing connections in the manner aforesaid, it has been found by actual test that the electric conductivity is increased materially. The offset 9 of the angle plate 8 also provides bearing surface and prevents wear upon the top of the carbon brush 7.

Of course it will be understood thatvarious modifications may be made in the construction and arrangement of parts without departing from the spirit of the invention as claimed.

I claim: a

In combination with the brush of a dynamic electric machine, a flexible connection having a loop at one end, a recess in one side said binder for drawing said clip, brush, and 10 of said brush Within which said loop is flexible connection together.

seated, a screw passing through said loop In testimony whereof I hereunto afiix my and said brush, a recess at the opposite side signature in the presence of two Witnesses.

of said brush and an L-shaped contact clip M AX7ELL V. ROBERTSON adapted to engage said last mentioned recess and extend over the top of said brush, Witnesses:

a binder adapted to fit over said loop Within ANNA F. DUFFY, said recess, said screw adapted to engage THOMAS A. HILL.

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