US764499A - Brush-holder. - Google Patents

Description

No. 764,499. PATENTED JULY 5, 1904.

H. G. REIS'I'. BRUSH HOLDER.

APPLICATION FILED NOV. 25, 1898.

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UNITED STATES Patented July 5, 1904:.

PATENT OEEicE.

GENERAL ELECTRIC COMPANY,

A CORPORATION OF NEW YORK.

BRUSH-HOLDER.

SPECIFICATION forming part of Letters Patent No. 764,499,

dated July 5, 1904.

Application filed November 25, 1898. Serial No. 697,331. (No model.)

To all whom it may concern:

Be it known that I, HENRY G. REIsT, a citizen of the United States, residing at Schenectady, in the county of Schenectady, State of New York, have invented certain new and useful Improvements in Brush-Holders, of which the following is a specification.

My present invention relates to brush-holders for dynamo-electric machines, and has for its object to furnish a simple, cheap, and efficient form particularly adapted to carbon brushes.

The drawings annexed show a device constructed according to the invention.

Figure 1 is a side elevation, and Fig. 2 a plan, of such a brush-holder. Figs. 3 and 4 are details.

In Fig. l, A is the brushholder arm provided with a box A upon its ends for bolding the carbon brush O in place. The brushholder-supporting stud passes through the hole A in the arm, bent near the edge, and provided with a split wall at H, which is clamped in place upon the stud by the bolt A. The brush C has secured to its upper end a clip of conducting metal C, extending over the end of the brush and along its sides, the top of the brush being slightly reduced, as shown in Figs. 1 and 2, so that the surface of the clip is flush with the surface of the brush. The horizontal full line in Fig.1, indicating the lower edge of the clip O, is extended on both sides beyond the clip to show the upper cut-away portion of the brush C, as described. The flexible conductor B is a flat strip of conducting metal, which is slipped between the spring-jaws of a clip 0, secured to the top of the clip 0. The other end of the strip B is secured in a similar manner to the clip D, clamped between two yielding ears (Z cl, forming part of a support for the springfollower, these ears being clamped into firm engagement with the end of the strip B by the bolt D. The conductor B is formed of a strip of sheet metal bent or folded to give it flexibility, permitting it to follow the feed of the brush without putting any strain on the latter. These parts are best understood from the illustration in Fig. 3, in which the I upper view is a side elevation and the lower an inverted plan of the part D. The frame, ofwhich the ears (Zd form an integral part, consists of the side pieces (Z (Z and the lower and upper plates fl" (Z, the latter being shown in dotted lines in the lower view. A retaining notched plate (Z is also provided for a purpose presently to be described.

As will be evident from Figs. 2 and 3 the frame, of which the ears (.Z (Z and (Z d form a part, is made from a single stamping of sheet metal, the parts of which are bent to give a firm seat upon the brush-support and provide supports for the follower-spring and connectors. The lugs (Z (Z act as a bearing for the pivot-pin E of the spring-follower. The lugs d d" act as an anchor for the frame upon the brush-support and also as a clip for the terminal of the brush-lead, and the angle formed between these lugs and the lugs (Z (Z forms an angular recess which providesa firm seat on the brush-support. The wing rZ serves also to anchor one end of the coilspring F, the free end of which projects, as seen in Fig. l, and may be moved and locked in different notches to alter the spring tension.

Referring again to Figs. 1 and 2, the upper end F of the spring carries a knob or ball f, by which it may be readily handled. The lower end of the spring is inserted in one of the notches in the part (Z and the spring itself is coiled around the shaft E the upper end registering with notches E in a pivoted arm E, in which the follower G is secured. The construction of this arm is best seen in Fig. 4, the left view showing a plan and the right a side elevation of the same, from which its construction will be readily apparent. Afiixed to the arm is a follower or spring strip G, which bears upon the top of the brush and presses it toward the commutator. (Not illustrated.)

pressure upon the brush, the spring may be moved from the position shown in full lines to that shown in dotted lines, or the tension may also be changed by shifting the other end of the spring from one to the other of the notches in the lug (Z of the follower- If it be desired to increase the support. If, on the contrary, it be desired to remove the brush, this is easily effected by releasing the spring, when the arm E may be turned back, carrying with it the spring-connection F. The flexible conductor B may be readily removed from the top of the brush, a new brush inserted, and the parts replaced in their illustrated positions.

It will be seen that my improved brushholder is extremely compact, which is a great advantage with some types of machines, and that it allows a brush to be readily adjusted. Furthermore, it permits a brush to be readily removed and replaced. By noting the particular notch in which the spring F lies it is possible to give the brush its original pressure after it is replaced without trial and adjustment, which is a great practical advantage.

WVhatIclaim as new, and desire to secure by Letters Patent of the United States, is

1. In a brush-holder, a rigid arm adapted for attachment to a stud and carrying a box for the brush, a pivoted notched plate, a spring engaging at one end with one of the notches, a conductor, and clips on the brush-arm with which the conductor engages, the clip on the arm having a notch engaging the other end of the spring.

2. A brush-holder for an electric motor or generator, comprising a brush support, a sheet-metal frame secured thereto formed of a single blank of sheet metal, provided with cars for connecting it with the support, and ears for a pivot-pin, and a brush-follower mounted on said pivot-pin.

3. A brush-follower for an electric motor or generator, comprising a sheet-metal frame formed from a single blank and having parallel ears to support a yielding follower-arm, and a bent seat to engage the edge of the support.

4. A brush-follower for an electric motor or generator, comprising a sheet-metal frame formed from a single blank and having parallel ears to supporta yielding follower-arm, a bent seat to engage the edge of a support, and a tongue overlapping the edge of the seat to form a clip for a brush-lead.

5. A brush-follower for an electric motor or generator, comprising asheet-metal frame formed from a single blank and having parallel ears to support a yielding follower-arm, a bent seat to engage the edge of a support, a follower-arm provided with a range of stops, and a spring anchored at one end in the frame and adapted to engage at its other end any of the range of stops on the follower.

6. A brush-holder for an electric motor or generator, comprising a brush-guide, a follower bearing on the end of the brush, a spring acting on the follower, and means for adjusting the tension of the spring at both ends.

7. A brush-holder for an electric motor or generator, comprising a brush-guide,.a follower bearing on the end of the brush, and provided with a range of stops, a spring anchored at one end in the supporting-frame, and adjustable therein, and cooperating at its free end with the range of stops in the follower-arm.

8. In a brush-holder, the combination with a supporting-arm, of a separately-constructed frame mounted thereon, a device mounted in the frame and an adjustably-mounted spring adapted to press said device against the brush to press the brush against the commutator.

9. In a brush-holder, the combination with a supporting-arm, of a separately-constructed frame mounted thereon, a brush-follower pivoted in the frame, and a spring coiled about the pivot and pressing against the follower.

10. In a brush-holder, the combination with a supporting-arm, of a separately-constructed frame mounted thereon and provided with notches, a brush-follower pivoted in the frame, and a spring pressing against the follower, one end being adapted to engage the notches in the frame to vary the pressure on the follower.

11. In a brush-holder, the combination with a supporting-arm, of a separately-constructed frame mounted on the arm and having an angular portion which fits the arm, and a brushfollower mounted in said frame.

12. In a brush-holder, the combination with a supporting-arm, of a separately-constructed frame mounted thereon, a rigid brushfollower arm pivoted in the frame, a resilient follower-arm carried by the rigid arm and adapted to bear on the brush, and a spring which engages the rigid follower-arm, to press the resilient arm against the brush.

13. The combination with a carbon brush, of a spring-clip 0 attached thereto, and a flexible conductor held in the jaws of the clip.

14:. A brush-holder provided with a pivoted follower and a detachable support for said follower consisting of a frame having integral clamping-ears d, (1* and side pieces (Z for the shaft of said follower.

15. A brush-holder provided with a springpressed follower and a detachable support for said follower consisting of a frame havingintegral clamping-ears d, (1", side pieces d, carrying the follower shaft and a notched plate d for engaging an end of the spring.

16. In a brush-holder, the combination with an arm provided at one end with a brush-box, of aseparately-constructed frame mounted on the arm, a device pivoted in the frame, and means for pressing said device against the brush.

In witness whereof I have hereunto set my hand this 22d day of November, 1898.

HENRY G. REIST.

Witnesses:

B. B. HULL, A. H. ABELL.

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