US1077914A - Commutator. - Google Patents

Description

R. E. NOBLE.

GOMMUTATOR.

APPLICATION FILED AUG. 14, 1911. 1,077,914, Patented Nov.4, 1913.

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W massesz a. wry l MWL y? www Nw RALPH En NOBLE, OIE CHICAGO, ILLINOIS.

COMMUTAZTOR.

Specieationof Letters Patent Patented Nov. 4, 1913.

Original application ied July'z, 1910, Serial No.- 570,108'. Divided and this application filed August 14, 111. SerialN0.643,834.

To 'all whomz't may 'concern Be` it .known that Il, RALPH; E. Norme, av

citizen of the United States, residing at Chicago, in the county of Cook` and:` State of Illinois, haveV invented certain new and usefulE Improvements int Commutators, of which the following isa speciiication, this application being' a division. ofz my former application', Serial No. 570;102, filed July 2, 1910.'

ThisV invention relates more particularly' to commutators, liavingj internal contact Surfaces for the brushes, andi to the method of' securlngjsuch commutator to the armature of the motor, althoughA some features thereof maybe applicable to other types ofcommutators;

Amongtheobjects of' this invention are to provide a. simple and efficient' commutator having segments or bars which may be made very readilyv and: cheaply; to provide means for's'ecurely clamping, the bars or segments together so that the saine may be assembled' if desiredbefore being placed in position in the motor or generator; and to provide means for securely fastening, the complete commutator in position. I accomplish these objects and secure such other advantages as may appear hereinafter by means of the-ape" the clamping rings; Fig. f1 is a detail of one of the bars or segments; and Figs. 5 and 6 are details showing a modified form of bar or segment.

As shown in these drawings, 7 indicates an armature having a spider 8 and a rear end plate 9 which are securely bolted together to clamp the disks 10 in position. The armature is provided with windings 11, preferably of the barrel type, within the end turns of which is preferably located the commutator 12. rllhe commutator bars or segments 13, as indicated in Figs. 1 to 4, are made of stock of uniform cross section, the sides of the bars converging so that, when the insulating strips 14 are placed between the same, they will iit together to means of rivets 16 as clearly indicated in= ig. 4t; These radials preferably extend out yfrom the outer ends of tlie'barsandl the leads from the armature coils are usually soldered thereto. The annular ring, formedy by the commutator bars or segments and the intermediate insulating strips; is insulated from `the adJacent parts by means of an insulating band 16 andV anl insulating: disk-17 which embrace the outer sides andV inner ends of the bars. Around the band 16A is passed a clamping ring:` 18 which is beveled around the outer end, andis split diagonally as indicated at 139 so that, when thisring is pressed inwardly, the ends ofl the segments thereof may slide upon each other sufficiently toy allow the rings to be pressed against the band 16.

The inner edges of the' segments. of` the ring 18 are rounded or cut away adjacent- "to'theslits 19 as indicated at 2O so. that the insulatingmaterial ofl the ring orband: 16

lmay be slightly pressed therein when the .ring is tightened. A second clamping ring 21 1s beveled on its inner surface to engage with the outer beveled surface of the ring 18 and its inner end fits within a flange 22 on a supporting ring or plate 23. The inner side of the ring 18 rests against this plate. Bolts 24 extend out through the plate 23 with their threaded ends engaging with tapped holes in the ring 21 so that when these bolts are tightened the ring` 21 will be drawn inwardly, thereby pressing against the segments of the ring 18 which will securely clamp the insulating band 16 and commutator parts 13 and 14: together to form a substantial commutator. The holding plate or ring 23 is provided with inwardly extending lugs or projections 25 which bear against the end of the spider 8, portions of the spider being preferably cut away to receive these lugs as indicated 1n Figs. 1 and 2. The plate 23 is held in position by means of bolts 26 which extend through the spider and rear end plate 9 and have their threaded ends engaging with tapped holes in the lugs 25. The commutator and its clamping and supporting rings are insulated from the armature windings by means of insulating material 27 placed between them. The brush or brushes indicated at 28 may be made in any desired manner, these brushes making internal contact with the commutator as shown in Figs. 1 and 2.

The construction and operation of my improved commutator will be readily understood, by those familiar with the art, from the above descption and the accompanying drawings.

It is particularly noted that, by means of my improved construction, the commutator may be made very readily and cheaply and is of substantial construction, the arrangement being such that the commutator may be completed and may then be readily secured to the armature by means of the bolts 26 which hold it securely in position.

Instead of the form of bars and radials heretofore described, I may in some instances use the form shown in Figs. 5 and 6. As shown in these figures, the bar 29 is made integrally with the radial 80, these by being forged out of suitable material. Nhile this construction does not permit of the bars or segments being made from strips of stock materiahyet the combined segments and radials may be rapidly and economically formed by means of suitable dies.

Having thus described my invention, which, however, I do not wish to limit to the exact details of construction or arrangement of parts herein `shown and described, except as set forth in the following claims,

what I claim and desire to secure by Letwardly, and an annular ring formed of contact members and intermediate insulating members, adapted to be engaged by said collapsible ring and the parts held in position thereby, said last-named annular ring being insulated from the other ring.

2. The combination with a rotatable device comprising circularly arranged component parts, of a plurality of segmental pieces constituting a ring for encircling the device and having their lines of abutment inclined to the plane of the ring, and mechanical means for exerting a uniform inward pressure upon the said ring.

3. The combination with a rotatable device comprising circularly arranged component parts, of a plurality of tapered segmental pieces constituting a ring with a cylindrical inner surface and a conical outer surface, the lines of abutment of the mental pieces being inclined to the plane of the ring, a collar surrounding the ring and having a corresponding conical inner surface, and means for causing axial movement of the collar upon the said ring.

' RALPH E. NOBLE. lVitnesses:

M. W. MURTZ.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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