US733952A - Brush-support. - Google Patents

Description

0m 0 9 1 1 2 Y L U .J D E T N E T A .P.

. l 9 5 w 3 3 7 m N BRUSH SUPPORT.

APPLICATION FILED DBO. 9. 1901. zmznwnn DBO. 26, 1902.

NO MODEL.

5 wuemtoz UNITED STATES Patented July 21, 1903.

PATENT OFFICE.

JAMES PHILIP ERIE, OF NEW YORK, N. Y., ASSIGNOR TO ERIE EXPLORATION COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

BRUSH-SUPPORT.

sPEcIFIoATIoN forming part of Letters Patent No. 73 3,952, dated July 21, 1903.

Application filed December 9, 1901 Renewed December 26,1902; Serial No. 136,734. (No mddela) To all whom it may concern:

Be it known that 1, JAMES PHILIP ERIE, a citizen of the United States, residing at New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Brush-Supports, of which the following is a specification.

My invention relates to supports for brushes or contacts for electrical machines, and has for its object to insure constant electrical contact between the brush and its cooperating part, as the commutator.

' My invention consists of the apparatus hereinafter fully described, and shown in the accompanying specification and drawings, in

which- Figure 1 is a longitudinal sectional view of my improved supports. Fig. 2is an end View of a support. Fig. 3 is a perspective view of the brush-holder. Fig. 4 is an end view of a modification of the support.

Referring to the drawings, A represents a suitable base for an electrical machine, of which E represents a moving part of the machine, as the commutator, with which contact is to be made by suitable brushes or contacts. Supports C are shown arranged at each side of the moving part or commutator B, and these may directly support the brush-holders,

0 or there may be an intermediate plate D of insulation secured to the supports 0, as by screws E.

The brush-holders F in this instance are shown suitably secured to the plates D by screws G, one form of brush-holder for carrying two brushes being shown in Fig. 3. The holder F is shown as provided with a central partition 1, with recesses 2 at each side thereof, which recesses may be suitably formed in a metallic block, as of brass, but by milling out the material. These recesses 2 may be of any desired depth, dependent upon the size of brush to be supported therein. The brushholder F is also provided with recesses 8,

5 shown in such relation to the recesses 2 that when a brush-holder is secured to one of the plates D in the manner shown in the figures a slidable pin H may be inserted in each of the recesses 3, and these pins will be in position to cooperate with the brushes I inserted in the recesses 2. The movable or slidable pins H are shown as spring-actuated, in this instance the springs 4 being shown within the recesses 3 and connected at one end to the brush-holder at 5 and at the other end to the pin 6, the springs being under a constant tension, or they may be arranged under compression tending to withdraw the pinsI-I within the recesses 3. Each pin H is provided with means for pressing a brush into contact with the moving part or commutator B. As shown in this instance, each pin is provided with a projection 7, adapted to bear upon a brush I. These projections 7 are shown as bearing upon the outer ends of the brushes, and through the action of the springs 4 the brushes are maintained in constant electrical contact with the moving part B. In order that the brushes may not move sidewise in the recesses 2-, suitable plates Sare provided, which may be screwed or otherwise secured to the outer sides of the brush-holders F. In case a series of brush-holders should be used side by side these plates 8 shouldpreferably be made of insulating material.

In Fig. 4 a slightly-modified form of brushholder is shown with but one recess 9 for the reception of a suitable brush and but one recess 10 to receive a movable spring-actuated pin 11, and since in this modification the recess for the reception of a brush is provided with sides 12 a plate 13 may be suitably secured, as by screws, over the brush to the brush-holder to keep the brush securely within the recess. In order to insure suitable connection between the projections 7 on the pins H and the brushes, each brush may be provided with a groove 14 in its end, within which the projections 7 are adapted to seat, and the pins may have suitable thumb-pieces 15 for manipulating the same.

By the construction of brush-holder described the brushes are held firmly in contact with a moving part or a commutator, and the springs constantly take up the march the brushes. By simply turning oneof the pins about its longitudinal axis, thereby freeing the projecting portion 7 of the pin from engagement with the brush, a worn or broken brush may be removed from a holder and a new one substituted, and my Whole construction is simple, efficient, and cheap.

Without limiting myself to the precise details of construction shown and described, I claim 1. A support for a brush or contact consisting of an uprightframe C, an insulated plate D connected to the top thereof, a holder F suitably fastened to the top of said plate and provided with a recess for a brush or contact a second recess in said holder, a pin Within said second recess, a spring connected both to the pin and to the holder tending to Withdraw the pin into the recess, and a projection extending substantially at right angles to the pin at its outer end adapted to bear directly upon the end of a brush or contact.

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