US1268018A - Carbon-brush holder. - Google Patents

Description

J. H. KNIGHT.

CARBON BRUSH HOLDER.

APPLICATION FILED mm. s, 19H.

Patented May 28, 1918.

c/TZZ ELY/97017 WWI/lg Mlgmk.

JAMES H. KNIGHT, OF FORT WORTH, TEXAS.

CARBON-BRUSH HOLDER.

Specification of Letters Patent.

Application filed March 6, 1917. Serial No. 152,747.

To all whom it may concern:

Be it knownthat I, JAMES H. KNIGHT, a citizen of the United States, residing at Forth Worth, inthe county of Tarrant and State of Texas, have invented certain useful Improvements in Carbon-Brush Holders, of which the following is a specification, reference being had therein to the accompanying drawing. I

The present invention has reference generally to improvements in brush holders and more particularly relates to carbon brush holders especially adapted for use on motors, dynamos, commutators, etc., for the purpose of conducting electric current.

It is the principal object of the present invention to provide novel means for holding a carbon brush and to associate with the holding means novel resilient means for automatically adjusting the carbon brush to consequently hold the brush in yielding contact, thus insuring an eflicient transmission of electric current.

As an additional and equally important object this invention contemplates the provision of integrally formed attaching means and brush receiving means.

Among the other aims and objects of the present invention may be recited the provisions of a device of the character mentioned with a view to compactness, in which the number of parts are few, the construction simple, the cost of production low, and the eificiency high.

Other objects as well as the nature, characteristic features and scope of my invention will be more readily apparent from the following description taken in connection with the accompanying drawings and pointed out in the claims forming a part of this specification.

The preferred embodiment of the present invention is clearly illustrated in the accompanying drawings in which z- Figure 1 is a perspective of the invention.

Fig. 2 is a ongitudinal section of the attaching sleeve and receiving socket, the other parts being shown in elevation, and

Fig. 3 is an end elevation looking toward the end of the sleeve, the supporting shaft being shown in sections.

Similar characters of reference are employed in all of the above described views, to indicate corresponding parts.

Referrin now, more particularly, to the accompanying drawings I have associated while the inner bore thereof communicates with the inner bore of the sleeve.

- The socket projects at right angles from the longitudinal axis of the sleeve and slidably receives a carbon brush 6, the latter being supported and guided by the socket.

In order to automatically adjust the carbon brush and normally maintain it in an efficient yielding contact with the commutator or motor 7 I have provided my improved resilient means in the present instance consisting of a coil spring 8 disposed in the socket and having the respective ends bearing against the shaft 1 and the inner end of the brush 6. In use, it will be readily apparent that the tension of the spring serves to maintain the outer or engaging end of the carbon brush 6 in contact with the motor or commutator and thus serves to insure an effective transmission of electric current. The two parts composing the entire device can be readily mounted in an operative position and the construction is such that should any of the parts become broken or damaged it can be readily replaced without affecting the operation.

It will be understood that the above description and accompanying drawings comprehend only the general and preferred embodiment of my invention and that various minor changes in detail of construction, proportion and arrangement of the parts -may be made within the scope of the appended claims and without sacrificing any of the advantages of my invention.

Havin thus fully described my invention, what I c aim as new and desire to secure by Letters Patent, is

1. In a device of the class described a combination, a shaft, a support for said Patented May 2a, 1918.

from said shaft, a sleeve adapted to slide upon said shaft, said sleeve being formed with longitudinal diametrically opposed recesses in which the projecting ends of said pins are adapted to project so as to be rocked against and rotated upon said shaft, said sleeve being formed with anintegral retiring tubular portion, spaced from said commutator a centrifugal brush engaging said commutator and projecting into the tubular portion of said sleeve and a spring mounted within said tubular portion and having one end dproject against said shaft and another en projecting against said brush so as to apply tension against said 15 .brush.

2. In a device of the class described a combination of a shaft,- a support for said shaft, a sleeve slidable upon said shaft, a

pin passing through said shaft and having 20 its opposite end projecting radially therefrom, such sleeve being rovided with recesses extending longitudinally thereof, the

projectin ends of the said pin adapted to enter sai recess of said sleeve; and a brush 25 carrying arm formed upon said sleeve. In testimony whereof I afiix my signature.

JAMES H. KNIGHT;

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