US880437A - Brush-holder. - Google Patents

Description

PATENTED PEBE 25, 1908.

2 SHEETS-SHB ET l.

L Q" M314.

PATENTED FEB. 25, A1908 A. BALL;-

BRUSH HOLDER.

vAPPLICATION FILED NOV. 30. 1906.

2 SHEETS-SHEET 2.

MliZn/esses [nven Z 02: 42% FM Q. M. by HM Ziylg.

- UNITED srArEsrArrnnr onnion- ALBERT BALL, or oLAREMoNr, NEW nAnPsnIaEjAssIeNoR TO SULLIVAN MACHINERY COMPANY, or OLAREMONT, NEW HAMPSHIRE, A CORPORATION or MAINE.

BRUSH-HOLDER.

No. esoaev.

Specification of Letters Patent.

Patented Feb. 25, 1908.

Application filed November 30. 1906- Sarial No. 346,686.

' 'To all whom it may concern:

of the United States, residing atClaremont,

, I dynamos of various types.

holder is adapted for general use in connection. with electric -motors or dynamos used lor variouspurposes and in various relations,

in no sense limited thereto.

Be itknown that I, ALBERT BALr a citizen in the county of Sullivan and State of New Ha1npshire,'have invented an Improvement in Brush-Holders, of which the following descrip tion, in connection with theaccompanymg drawings, is a-spemficatromhke letters on the drawings representing like parts.

This invention relates to brushholders for use in connection with electric motors and \Vhile said brush the accompanying drawings, wherein,-

Figure 1 is a vertical central sectional view of a motor frame, a brush holder supporting ring, and means for securing thesame in proper position upon said frame; Fig. 2 is an end elevation of the mechanism shown in Fig. 1; and, Fig. 3 is a longitudinal central section representing the brush holder" as applied to a motor employed upon an electrically driven mining machine.

Referring to that specific embodiment of the invention disclosed inthe drawings, the

motor frame, which may be of am desired type, is represented at 1. purposes and as showing one manner of contemplated use of the invention, I have herein indicated the motor frame as supported upon a flat bottom plate or shoe 2, of a mining machine. In the specific type of mechanism referred to and hereln indicated, the ma chine is caused to slide along the mine botengagement with a fixed fee-d chain having anchored ends in accordance with the gen eral principles disclosed in U. S. patent to Mitchell No. 656,414. It is ap arent, how

ever, that the brush holder may e employed.

upon mining machines of any suitable type,

For illustrative machines: I

The motor employed may be of .any desired type.

as Well as upon machinesothen-than mining cured to the motor frame and a motorshaft '4, mountedin suitable journals in sa'idframe,

the said shaft in :the present instance having a beveled gear 5 thereon, adapted through suitable connections to operate the cutting or other mechanism of the mining .machine in any preferred manner. IVhile the .motor frame may be of anysuitable construction, it is herein shownas havin at one endan encircling easing 6, andas aving secured .to

the edge of an adjacent portion-ofthe framing, the brush sup orting mechanism fembodying one type 0 my invention, it .being apparent that said brush supporting mech anism may be suitably supported upon any In the present constructioniI have herein represented field magnets 3,.se

desired part, so that the brushes may be- I brought into the desired relation to the coinmutator.

Referring particularly to Figs. 1 and 2 upon the annular edge or face of the motor frame 1, is secured a base ring 7, in any desired manner, as for example by clamping screws 8, engaging in the present instance an annular flange 9, at the base of said. ring,

which, as herein shown 'is turned or formed to provide an annular Way or track 10, where in is received for rotation the brush holding ring 11, secured therein in any suitable manner, as by gib plates. To said ring is secured in the present instance, in any suitable manner, a wooden or other non-metallic ring 12, upon which the brushes 13., are suitably mounted, so as to be properly positioned with respect to the commutator. It is desirable to have free and ready access to the brushes for examination or repair, and yet it is essential that the brushes be maintained in sub stanti ally exact working relation, so that the motor may be operated withoutsparking, In many types of inechanismit is diiiicult or impossible to obtain accessto the brushes when in operative position, and hence it be comes necessary to shift the support for'the brushes to obtain access thereto. After such shifting it may be a matter of considerable difficulty to return said brushes to their proper position of adiustment. Heretofore, while brushes have been mounted so that brush supporting device of my invention,

they may be withdrawn from operative position for repair and examination, they have not been'somounted that convenient access may be had thereto and yet they maybe readily and quickly returned to exact predetermined position. In the class of mechanism with which I have-shown a type of the bottom plate or shoe 2, is customarily so located with reference to the brush supportmg ring 1 1, mounted in a plane normal thereto, that abrush supported at or near the lower ortion of the ring is very difficult .of access, because of the proximity of said bottom plate or shoe, and moreover the entire mechanism may be in use so positioned that access may readily be had only at a singlepart of the mechanism, as, for example, the upper part of the ring 11, viewing Fig. 3. By rotating said rin 11, each of the brushes 13 may, in turn e brought into position for ready examination, wherever desired. Were no means provided for determining the proper adjusted position of the brushes 13, and the ring 11 supporting the same, after each such examination of the brushes it would be necessary carefully to re-adjust or determine precisely the position of the brushes' This would be a matter involving the expenditure of considerable time and involving skill and judgment. In order that the brushes may readily be returned to proper position, I have provided the ring 11 with brush positionestablishing provisions, whereby the same may be secured in predetermined position and have provided cooperating means upon a member with respect to which said ring 11 rotates. In thepresent type of the invention the said ring is provided with a socket 14, adapted to receive the end of a set screw 15, herein shown as mounted in an overhanging portion of the ring 7. The socket 14 is formed in a predetermined portion of the ring 11, which is determined after proper experiment. When the set screw 15 is screwed into its socket, the brushes 13 are maintained in pro er operative position. When it is desire to have ready access to the brushes for any urpose the set screw 15- may be sufficient y unscrewed to permit rotation of said ring 11, which may be readily returned to its proper position, so that the said set screw and socket may be brought into register. It is apparent that within the scope of my invention other means may be employed by me to accomplish this result.

In assembling the mechanism the inner ring 11, carrying the brush holder, is positioned in the base ring 7, and secured therein by the set screw 15. Said rings are then rotated as an entirety until the said set screw is at a point of convenient access and the brushes are brought to the correct position. The set screws 8, securing the base ring 7 to the motor frame, permit the fine adjustment of the brushes relative to .the commutator and when this position has been determined,

the said set screws 8 are made fast and no further adjustment of the base ring 7 is gen erally necessitated, inasmuch as the inner ring 11 is always returned'to the same relative position with-respect to said base ring 11. in the manner previously described.

Having thus disclosed one ty e or embodiment of the invention, I wis 1 it to be understood that although specific terms are used, they .are employed in a generic or do scriptive sense merely and not for purposes of limitation, the scope of the invention being set forth in the following claims.

Claim.

1. A brush mechanism for electric motors or the like com I rising a motor frame, a base support rotata ly mounted upon the said frame, and means to secure the same in any desired position of circumferential adjustment, whereby the brushes may be adjusted to a non-sparking position, a rotatable brush supporting. ring sustained by said base support with capacity for rotative adjustment, brushes supported thereby, and cooperating securing provisions upon said base support and said ring for maintaining said brush supiporting rin in a predetermined position 0 rotative ar justnient.

2. A brush mechanism for electric motors or the like comprising a motor frame, a base ring rotatably mounted upon said frame, and means to secure the same in any desired position of circumferential adjustment, whereby the brushes may be adjusted to a non-sparking position, a rotatable brush suiporting ring sustained by said base ring with capacity for rotative adjustment brushes supported thereby, and cooperating securing provisons upon said respective rings for maintaining said brush supporting ring in a predetermined position of rotative adjustment.

3. A brush lnechanism for electric motors means to secure the same in any desired position of rotative adjustment, whereby a non-sparking position may be secured, a rotatable brush sup orting ring sustained by said base ring witi capacity for rotative adjustment, brushes supported thereby, a locking device carried by one of said rings and cooperating provisions upon the other ring so located that when brought into register with the locking device the brushes are maintained in pro or position.

4. A brush mec anism for electric motors or the like comprising a motor frame, a base ring secured thereto, means to secure said base ring in any desired position of rotative adjustment to secure non-sparking, a rotatable brush supporting ring sustained b said base ring with capacity for rotative {LL justment, brushes supported,thereby, a set sec/i ring having a set screw receiving socket se located that when brought into re deter with said set screw the brushes are maintained in proper osition.

5. A rushmechanism for electric motors 01' the like comprising a motor frame, a base ring rotatably mounted upon said frame,

said ring being circuniferentially adjustable to a non-sparlnng position, means to secure 1 said ring .111 such nonsparking position, a

rotatable brush sup orting ring sustained by said base ring witr capacity for rotative adjustment with reference thereto, brushes supported thereby, a locking device carried by one of said rings, and cooperating cro- 'VlSlOIlS upon the other ring, so located that when brought into register with the locking device the brushesare maintained in proper position.

6. A brush mechanism for electric motors or thelihe comprising a motor frame, a base ring rotatably mounted u on the said frame, said ring being freely an circumferentially adjustable, whereby the ring may be secured in a non-sparking position, set screws securing said base ring inv such position, a rota table brush supporting ring sustained by the base ring with capacity for rotative adjustment relative thereto, brushes supported thereby, a locking device carried by one of said rings, and cooperating provisions upon the other ring so located that when brought into register with the locking deirice the brushes are maintained in proper position.

in testimony whereof, l have signed my name to this/ specification, in the presence of two subscribing witnesses.

ALBERT BALL. i i itnesses LEE'A. KNIGH S, JAMES A. BRUCE.

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