US779265A - Brush-holder for dynamo-electric machines. - Google Patents

Description

PATENTBD JAN. s, i905.

Y M. Gamm. BRUSH EGLBEMQHDXNAMQ ELECTRIC MACHINES.

' PPLIGTIH 'FILEITEAY 21, 19`04.

.215 forming a part of -this speciication.

better unllerstanding ot' my invent1on, how-- No, 'rz/dass.

Unirse einsparenv M. coNLnn,

Patented. aznumy 1??, 1995;.

F VADSON, WSGONSN, ,18516111012 TO NORTEL WISCONSIN BRUSH-HOLDER FR DYNAMMELECTFMG MAOHlNES..

SPECIFICATION formingl part of Letters atent No. 779,265, dated January 3, 1905 Appnctnon ned any 21,1904. senti no. 209.032.

T0 (1f/ 2571/0725 t Unfall/,Concerns v Be it known that I, FREDRICK M. CoNLs-n, a citizen or' the United States, residing at Madison, in the county of Dane and State ot' "Wis" consin, have invented certain new and useful Improvements in Brush-Holders for Dynamon Electric Machines, of. which the following is a specification.

The object of my present invention is the IO production of a brush-holder which is reliable in operation. is simple in construction and contains a minimum numbervof parts, and is comparatively inexpensive to manufacture.

In the preferred form of my invention the 'I5 brush -holder consists, essentially, of a single piece or strap of spring conducting metal, such as copperor brass, which is looped about the brush-holder stud or Isu}' portingpost and has the brush secured 1.o its ends, means being 2O provided for detaehably clamping the looped portions to the stud.

The various features` of novelty which characterize my invention are pointed out with particularity in the claims annexed ti) and or a ever, reference may be had to the accompan ying drawings and description, in which I have illustrated and describe'd embodii'nents of my invention.

Of the dr-(nvings, Figure 1 is a perspective view illustrating' a. brush-holder clamped to its supporting-stud and carrying a brush. Fig. Q isa perspective view showing the bent strap forming the mush-holder frame. Fig. 3 is an elevation showing a portion ot' a modified construction; and Fig. 4. is a view similar to Fig. 3, .showing another modification.

ln the drawings, 1 represents a suitable sup- 40 porting stud' or post, which is shown in Fig. 1

as cylindrical."

2 represents a strip, strap, or ribbon ot' some conductive resilient metal, such as tempered wrought copper or brass, doubled upon ilselt' and having a portion 3 looped around the stud l. The two end or leg portions i and 5 ot thestrap or ribbon 2 extend substantially side by side, but diverge slightly from each other as the distance from the stud increases. ',lhe ends 6 and i of the legs 4 and 5 5G are inturned or bent toward each other sabstantially at right angles to the main portions ot' the legs..

The brush 8, supported by the brush-holder,

l may be of any 'desirable construction, and is 55 preferably formed ot carbon. This brush is clamped against the-outer face of the end p0rtion 'i of the leg by a bolt 9, which passes through apertures 7 and 6 in the portions 7 and 6, respectively, and is threaded into a 6G nut 10, located between the legs 4E and 5, and preferably proportioned so as to be prevented from rotation by its engagement with the inner sides of the legs. A bolt 11 passes through the legs 4f and 'adjacent the stud 1` and is 65 threaded into a nut 12. The bolt 11 and nut l2 serve as a means for detachably clamping the brush-holder in any desired position. A washer memberI 13, located between the bolthead and the leg f1, and space member 14., lo,-` cated between the legs f1 and may befern ployed, if desired, though one or bother` these members may be dispensed with. By unscrewing the bolt 11 the brush-holder may be adjusted angularly about the stud 1 to any de- 75 sired position. It will-bereadilyunderstood by hose skilled in the art that the resiliency ot the arms 1 and 5 serves to yieldinglyT hold the brush 8 against a cooperating commutator or collector ring, &e., with the propel.` amount of force.

Various modifications may he made in the form of my invention without. departing from its spirit. For instance, instead of making the brush-holder frame as shown in Fig. 1 35 the portion I?, and stud or support 1 may be shaped as shown in Fig. 3 at 3' and 1', respectively. and secured in place by a bolt 11' passing through the stud and the legs 1 and 5, or. the stndengaging portion of the strap 2 may 90 consist ot' two parallel portions bent together, as hown in l `ig. 1 at 3", in which case they ther 'modifications in form and arrangement may be madeV Without departing 'from .the spirit of my invention.

What I claim as new,I Iand desire to secure by Letters Patent of the United States, is 1. In combination, a supporting stud or post, a strap of resilient conducting material looped about said, stud or post, and a brush rigidly secured to the ends of said strap.

2. A brush-holder frame comprising a bent strap, a brush secured to the ends of said strap, and means for securing said strap to a support in such manner that the strap may be an-l gularly adjusted with respect to said support.

3. A brush-holder frame comprising asingle piece or. strap doubled upon itself, a brush carried by the ends of said strap,'and means for securing the body of said strap toja'supporting stud or post. Y

4.' A brush-holder comprising a pair of flexible legs' integrally connected together, means for securing a brush to the ends of said 4legs, and means for securing the legs to a support at a'pont where t e legs are connected together.

5. In combination, a strap or ribbon of resilient material doubled upon itself, means for securing a brush to the ends of said stra'p or ribbon, and means for securing vsaid strap to a support. 6. In combination, a strap or ribbon of resilient conducting material shaped to form a support-engaging portion and a pair. of egs,

yand means for securing' a brush to the ends of secured against one side of one of said. in-- turned portions by a bolt passing ythrough both of the inturned portions.

8. vA brush-holdercomprising a pair of legs of resilient material extending side by side and having portionsrat their ends bent to- Waard one another forming two portions side by side, a brush resting against the outer surface of one of said portions, and means for securing the brush and the tWo inturned pob tions rigidly together.

, In witness whereof l -have hereunto s'et my hand this 17th day'of May, 1904;.

FREDRiCK M. coNLEE.

Witnesses:

H. L. MORRIS, A. J. BUENZLI.

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