US863683A - Brush-holder for electric motors or the like. - Google Patents

Description

No. 863,683. PA'IENTED AUG. 20, 1907. T. s. WATSON. BRUSH HOLDER FOR ELEGTRIGMOTORS OR THE LIKE.

APPLICATION FILED SEPT. 1,1906.

THOMAS S. WATSON, OF MILWAUKEE, WISCONSIN.

BRUSH-HOLDER FOR ELECTRIC MOTORS OR THE LIKE.

Specification of Letters Patent.

Patented Aug. 20, 1907.

Application filedlseptember 1,1906. Serial No. 332,999.

To all whom it may concern:

Be it known that I, THOMAS S. WATSON, a citizen of the United States, and a resident of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Brush-Holders for Electric Motors or the Like, and I do hereby declare that the following is a full, clear, and exact description thereof.

The object of my invention is to provide a simple and effective carbon brush and holder for electric motors or dynamos, wherein provision is made for adjusting members of said holder so that the carbon is firmly held against side-play or wabble in its seat, while being held in contact with the commutator, the arrangement being such that the carbon at the same time is free to be moved through the holder in order to take up wear.

Said invention consists in certain peculiarities of construction and combination of parts as hereinafter fully set forth with reference to the accompanying drawings and subsequently claimed.

In the drawings: Figure 1 represents a plan section view of a carbon brush and brush holder made in accordance with my invention, the section being indicated by line 1 1 of Fig. 2, Fig. 2, a sectional elevation of same as indicated by line 22, Fig. 3, a cross-section of the holder as indicated by line 3-3 of Fig. 2, and Fig.4, a detail side elevation of one of the brush-holder jaws.

Referring by letter to the drawings, A, A indicate brush-holder jaws provided with split shanks B having squared openings O, and a pair of ear-extensions D, the squared openings being adapted to fit over a similarly squared stud E of a brush supporting bracket not shown.

Each jaw A, A, is held in its lateral adjustment upon the stud E-by a clamping screw F in threaded connection with the pair of ears. Interposed between the jaw members and mounted upon the stud E is a sleeve G, which sleeve is provided with a squared opening to receive the stud, and a forward lug H, of the sleeve serves as a support for a post I, carrying a looped tension spring I, having its free end arranged to eXert pressure upon the carbon.

The brush holder jaws terminate in forward inturned parallel ways K, having tongues a that are of bevel or taper face in cross-section, for the reception of a carbon block L, provided with corresponding bevel or taper face grooves 11, which block as previously stated, is held in contact with a commutator ring by spring I, as best shown in Fig. 2 of the drawings. The spring J is adjustable as to tension by means of nuts 0, d, in threaded connection with the post I, the looped end of said spring being confined between flanges N, of the jaws, and thereby held against side play.

It will be understood from the foregoing description that various widths of carbon may be inserted into the holder by suitable adjustment, which permits an accurate but easy sliding fit of said carbon upon the ways, an essential feature to the operation of a perfect holder of the class to which my invention pertains.

While I have shown and described a carbon brush holder, wherein the central sleeve portion for supporting the post is separate from the jaws, it is obvious that the same may be integral with one of said jaws without departing from the invention, it being also within the scope of my invention to substitute a round stud for the square one shown, and in place of the tongue and groove connection for guiding the carbon shown, other forms of equivalent construction may be used.

I claim:

1. A carbon-brush holder for electric motors or generators, the same comprising jaws having oppositely disposed parallel ways that are tapered in cross-section to form guides, and the brush having taper edges corresponding to said guides with which they are engaged.

2. A carbon-brush holder for electric motors or generators, comprising jaws having oppositely disposed paral.

lel ways, said ways being tapered in erosssection to form guides for correspondingly shaped tapered edges of a carbon, and means for regulating the set of the jaws, whereby a simultaneous lateral and transverse adjustment of the carbon with relation to said ways is obtained.

3. A carbon-brush holder for electric motors or generators, comprising jaws having oppositely disposed paral lel ways for engagement with the carbon, means for ad justing the set of the jaws with relation to each other.

4. A carbon-brush holder for electric motors or generators, comprising jaws having oppositely disposed parallel ways for engagement with the carbon, supporting means for the jaws, means for adjusting and holding said jaws with relation to each other upon their support, and a spring in connection with the holder adapted to exert pres sure upon the carbon in a direction parallel with the ways of said jaws.

5. A carbon-brush holder for electric motors or generators, comprising a brush-holder support, jaws mounted upon the support, means for adjusting the jaws with relation to each other, a carbon in tongue-and-groove connection with the jaws, and a spring in connection with the holder adapted to exert pressure upon the carbon in a direction parallel to the tongue-andgroove connection between said carbon and jaws.

G. A carboubrush holder for electric motors or generators, comprising a supporting stud, non-rotatable jawmembers adjustably mounted thereof, oppositely disposed tongues extending from the jaws, a'grooved carbon arranged to engage the tongue, a non-rotatable sleeve mounted on the supporting stud between the jaws, a post extending from the sleeve, and an adjustable tensionspring carried by the post for engagement with the carbon.

In testimony that I claim the foregoing I have hereunto set my hand at Milwaukee in the county of Milwaukee and State of Wisconsin in the presence of two witnesses.

THOMAS S. WATSON.

Witnesses Gno. W. YOUNG, N. E. OLIPHANI.

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