US489185A

US489185A - Commutator-brush holder

Info

Publication number: US489185A
Authority: US
Publication date: 1893-01-03
Anticipated expiration: 1910-01-03

Description

(No Model.)

G. P. GOODRIOH. GOMMUTATOR BRUSH HOLDER.

Patented Jan. 3, 18.93;

UNIT D STrvras PATENT OFFICE.

' onARLnsr. GOODRIOH, OF CHICAGO, ILLINOIS, ASSIGNOR TO JOHN G.

THOMPSON, or MILWAUKEE, WISCONSIN.

COMMUTATOR-BRUSH HOL'DER.

SPECIFICATION forming part of Letters Patent No. 489,185, dated January 3, 1893. Application filed December 29, 1891. Serial N0.416,4=95. (No modeLl To all whom it concern:

Be it known that I, CHARLES F. GOODRIOH,

a citizen of the United States, and a resident of Chicago, in the county of Cook, and in the State of Illinois, have invented certain new and useful Improvements in Oommutator- Brush Holders; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention has for its object topr'ovide a commutator-brush-holder in which a springcontrolled pressure mechanism may be regulated as to tension, without detaching the brush holder from the machine of which it forms a part, and to this end, the said invention consists in certain peculiarities of construction and arrangementof parts to be hereinafter described with reference to the accom panying drawings and subsequently claimed.

In the drawings':.Figure 1. represents a side elevation'of a commutatorbrush-holder constructed according to myinvention, a faceplate or washer forming part of itsattaching mechanism being shown in section, Fig. 2. a'

Vertical longitudinal section of the same taken online 2-2 of the succeeding figure, Fig. 3. a plan viewof the brush-holder, the shank of the-same being shown as broken away, Fig. '4. adetail elevation partly in section on line -4 of the preceding'figure, and Fig. 5. a detail transverse section taken on line 55 of Fig; 4, a spring-arbor illustrated by this view being in elevation.

Referring by letter to the drawings, A represents a guide having the general contour of a commutator brush B that is loosely arranged therein, and this guide is provided with verticall'y disposed side slots 12 that are preferably of segmental form.

v Extending rearward from the upper end of the-guide A is a housing G provided with bearings for a transverse arbor D that is squared or ,otherwise'sha'pedatits ends to 'takea key or wrench. The guide A and housmg Care shown as cast, in one piece with a squared shank E for engagement'with a suit able suppo1't,-a' face-plate 0r washer F, and jam-nuts GH being arranged on the screw. threaded-rear endof the shank to serve as a means for holding-the same in rigid engagementwith said support.

said housing.

ber of the same.

is regulated by turning the arbor D in they Surrounding the arbor D, within the housing 0 is a spiral spring I,"th'e coils of the latter being wound in opposite directions from a central yoke c that bears against a step d on said arbor, this stop being shown in the form of ascre w,and the ends of the spring have their bearing against the rear Wall of Arranged on the arbor D, outside of the housing, are slotted plat-es J, and each of these plates is provided with two lateral studs e diametrically opposite to each other. Slipped onto the arbor D, against the plates J, are the rear ends of links K, and these links are provided with slots f for the engagement with the studs e on said plates. The forward ends of the links are connected by a transverse pin L, that engages the slots 6 in the sides of the guide A, andloose onfthis pin is a block M that impinges against the outer end of the commutator brush above described.

Fast on the arbor D,'outside of the links K, I

are ratchet-plates N, and while I have shown each of these plates as provided with only three risers, they may have an indefinite num- The tension of the spring proper-direction, and this tension is maintained by the engagement of each of the ratchet plates N with a lateral studs onthe relative one of the slotted plates. J above described. The power of the spring-I, acting throughthe medium of the arbor D,.links K,

pin L and block'M, is exerted on the brush B,

and thus the latter is always held down against the commutator, the slots 6 in the guide A permitting the necessary movement of the spring-controlled mechanism to compensate ior wear on said brush. I Should the springl weaken or it be necessary from any cause to increase, or diminish, its tension the arbor D is turned in the proper direction by means of a key, wrench, or other suitable implement, to accomplish this result.

The links K being slotted for engagement with the studse on the slotted plates J,'the latter will automatically, adjust themselves to permit those of their lugs in engagementwith the ratchet-plates N- to.automatically-discus gage and re-engage when'the arbor D is turned to tighten the spring I, but if said arbor be turned to loosen said spring, the disengagement of said studs and ratchet-plates, neces sary to permit this latter turn, can be readily eifecte'd by the operator.

I Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:-

1. A commutator-brush-holder comprising a slotted guide for the brush, a pin arranged to engage the slots in the brush-guide, a block 'onthe pin in opposition to said brush, a housing extended from said brush-guide, an arbor having its hearings in thehousing, links connectingthe arbor and block-supporting pin, a spiral tension spring wound on the arbor and made fast thereto, and a ratchet-mechanism controlling the wind of the spring, substantially as described.

2. A commutator-brush-holder comprising a guide for the brush, a housing extending from the brush-guide, an arbor having its hearings in the housing, a spiral tensionspring wound on the arbor and-rnade'fast thereto, slotted plates arranged on the arbor studs, and a pressure-block supported by the links in opposition to said brush, substantially as described.

3. A commutator-brush-holder comprising a guide for the brush cast in one piece with a housing and attaching shank, a spring-controlled pressure-mechanism in opposition tothe brush, and suitable means for regulatingthe tension of said pressure-mechanism, sub-:

stantially as described. 7 d

In testimony thatlclaim the foregoing I have hereunto set'iny hand, at Chicago, in the county of Cook and State of Illinois, in the presence of two witnesses.

4, CHARLES F. GOODRIOH.

'Witne'sses:

- H. R. LEYDEN,

F. A. BRYAN.