US1427407A - Current-collecting device - Google Patents

Description

C. B. MILLS. CURRENT COLLECTING DEVICE. APPLICATION FILED NOV-26. 191B.

Patented Aug. 2 9,.1922.

INVENTOR C/Ms/erBM/As. BY

ATTORNEY UNITED STATES Persm OFFICE.

CHESTER B. MILLS, or EAST'MCKEESPORT, PENNSYLVANIA, assienon, TO WESTING HOUSE ELECTRIC &

VANIA.

To all whom it may concern: i

, Be, it known that I, CHE'sTER B. MILLs, a citizen of the United States, anda resident of East McKeesport, in the county of Allegheny and State of Pennsylvania, havein vented a new and useful Improvement in Current-Collecting Devices, of which the following is a specification.

My invention relates to brush-supporting devices, being particularly adapted for use with current-collecting rings, and it has for its object to provide apparatus of the character designated that shall be simple and in; expensive in construction and in which the brush-adjustment shall be reduced to a minimum. In the accompanying drawings, Fig. 1 is an end-elevational view of a portion of a dynamo-electric machine provided with ourcordancewith my invention; Fig.2 is a detail plan view of an individual brush box showing the radial adjusting device also shown in Fig. 1, and Fig. 3 is a sectional View along the line III-III of Fig. 1 and showing the longitudinal adjusting device embodied in my invention.

Heretofore, in assembling dynamo-electric machines, it has been necessary to adjust the individual brushes with respectto the col lector rings very carefully. By my inven tion, I reduce the amount of necessary adjustment to a minimum and, at the same time, produce a device wherein the brushes are both radially and longitudinally adjustable, and in which the parts are so designed as to be readily adapted for die casting and for ready assembly and easy inspection.

For a better understanding of my inven-. tion, reference may be had to the accompanying drawings in which I show a portion of a dynamo-electric machine 1 provided with an end bracket 2 having projecting arms 3 upon which a current-collectlng device i is mounted. The current-collecting device 4 coniprisesan arcuate brush carrier 5 supporting a plurality of brush boxes 6. Each oi the brush boxes 6 comprises a box structure 8 having side lugs 9 whichare provided with slots 10 through which bolts 11 extend to attach the brush box to the carrier 5. Radial adjustment may be efi'eeted, as the collector rings Wear down, by loosening the bolts 11, sliding the brush box toward the collector ring in a radial direction,

' Specification'of Eetters Patent.

Application filediNovemb er 26, 1912.

l and again tightening the bolts.

. conducting material and MANUFACTUR NG COMPANY, A' CORPORATION OF rENNsYL CURRENT-COLLECTING :DEVICE- Patented Aug. 29, 1922'. Serial N0.,264,235. i X

7 brush12 the brush box 6 and is with a collector ring 7 is mounted within held in engagement by means of a mounted upon the brush carrier 5 by means of a bolt 1.4. The inner end of the spring 1" is fastened to a sleeve member 15 that surrounds the bolt 14; and is provided with a ratchet wheel 16 which isheld in position by means of a pin or lug 17 projecting from the brush carrier 5. In order to adjust the pressure of the spring upon the brush, the bolt 14 may be loosened sufliciently to permit the sleeve 15 to be moved outwardly thereon until the ratchet wheel clears the end of the pin 17 The ratchet wheel may then be turnedto effect the desired adjustment of spring pressure; after which it may I be replaced, with one of its teeth in engagerent-collectlng devices constructed in acment with the pin 17, position by the bolt 14,-.

The brush carrier 5 is and be clamped in composed of good is electrically connected to the brushes 12 by means of flexible shunts 18, as well as through the brush box 6, and is connected to an external circuit by means of terminals 19 welded upon the outer periphery thereof. The arms 3 of the end member 2 are provided with a plurality of longitudinally-extending pins 20, only one of which is shown, which support a plu rality of brush carriers 5, 21 and 22 and are separated therefrom by insulating sleeves 23 and from each other by short insulating sleeves 24. The brush carriersmay be longitudinally adjusted by means of a threaded nut 25 and a'coacting threaded sleeve 26 that is mounted. upon the pin 20 intermediate the sleeve 24L and the arm 3. When the desired longitudinal adjustment has been made, the carriers may be locked in position by means of a threaded lock nut 27, also mounted upon the sleeve 26, and a bolt. 28 having threaded engagement with the other end of the pin 20.

It will be understood by those skilled in the art that, by my invention, I have produced a device which reduces the labor of adjusting the brushes of collector rings to a minimumandwhich is composed of parts that may be inexpensively constructed and are strong and durable. v

While I have shown. but one form of my invention, and described, in detail, but one application of the same, it Will be obvious spring 13 that is separately to those skilled in the art that it is not so limited but is susceptible of various minor changes and modifications \VlLhOlli) depaiting from the spirit thereof, and I desire, therefore, that only such limitations shall be placed thereupon as are imposed by the prior art or are specifically set forth in the appended claims.

I claim as my invention:

1. In a current-collecting device, a collector ring, a brush carrier adapted to hold a plurality of brushes in engagement With said ring, and means for longitudinally adjusting said carrier and said brushes a unit, and means for radially adj usting said individual brushes.

2. In a current-collecting device, a plurality of collector rings, a plurality of arcuate-shaped brush carriers of conducting of brushes in engagement with one of said rings, a plurality of members adapted to support said brush (if-llllOI'S, and threaded means disposed thereon to longitudinally adjust said carriers and said brushes as a unit.

In testimony ivl'iereot', I have hereunto subscribed my name this 30th day of Oct,

CHESTER B, MILLS.

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