US1428865A

US1428865A - Commutator cylinder

Info

Publication number: US1428865A
Application number: US211774A
Authority: US
Inventors: Charles W Starker
Original assignee: Westinghouse Electric and Manufacturing Co
Current assignee: CBS Corp
Priority date: 1918-01-14
Filing date: 1918-01-14
Publication date: 1922-09-12
Anticipated expiration: 1939-09-12

Description

' "C. W, STARKER.

V COMMUTATOR CYLINDER; APPLICATION FILED JAN. 14, I 9I8.

1,428,865,. v PatentedSept.12,1922.

II III! ////I/// I WITNESSES: INVENTOR BY f I I 1, v ATTORNEY Patented Sept. 12, 1922.

UNITED STATES PATENT/OFFICE.

CHARLES w. STARKER, .OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR 'ro WESTING- I-IOUSE ELECTRIC AND MANUFACTURING COMPANY, A' CORPORATIONOF PENN- SYLVA'NIA.

Application filed 1 mm 14, 1918. Serial No. 211,771.

To all whom it may concern: v y

Be it known that I, CHARLES W. STARKER, a citizen of the German Empire, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in commutator. Cylinders, of which the following is a specification. v My invention relates to dynamo-electric 10 machinesand has special relation to commutator cylinders therefor. y y

The object of my invention is to rovide a commutator cylinder by means of? which points of e ual potential throughout .the armature $11211 be connected together and which the leads connecting these points shall be firmly supported in easily accessible positions. y I i Heretofore, it has been customary to connect points of equal potential in an armature by means of cross connectors situated either at the end'ofthe commutator adjacent the armature or at the end of the armature opposite the. commutator cylinder for the purpose of equalizing the current flow in different portions of the armature winding, thus compensating. for the' current-un balancing effect of eccentric armature mount ing and difi'erences'inthe permeability of different pole-pieces and of different por tionsof the frame. When the cross connections are situated at the end of the commutator cylinder adjacent the armature, they are inaccessible for inspection and repair and when they are situated at the end of the armature opposite the commutator cylinder, they are inaccessible for inspection or repair and have the additional disadvantage that different potentials may be developed in the leads which connect the crossconnectors to the commutator bars, resulting in diiferent values of current flowing in parts of the armature in which the current values should be the same, the elimina 46 tion of which is the prime object of the cross-connections. 1

By my invention, I have provided a means whereby the cross-connectors are supported at the end of the commutator cylinder op- 50 posite the armature, rendering them readily accessible, and are connected directly to the commutator bars, thereby eliminating any coMMUrA'roEi cYL IivnEE.

possibility of a difierence barsthus connected. I

In the accompanying drawing, Fig. 1 is a s de elevational [view of a portion of, a dynamo-electric machine, constructed in accordance with my invention, partsbeing broken away to illustrate the cross conne v tions; and Fig. 2 isasectionalview of the of potential atthe machine portion shown in Fig' "1, thefsec-' tion being taken along the -line\-IIII thereof. I Referring more particularly tothe draw ings, have shown a plurality jofconductmg 'bars 1 and insulating bars'or strips 2 alternately disposed to form a commutator cylinder that is supportedby, but insulated from, a sleeve 3 situatedon the inside thereof. Bars 4 equally spaced aboutthe 'periphery of the commutator-cylinder project from the end thereof forming the end portions 5 to which cross-connectors 6 are'attached. The end portions 5 are held rigidly in position by means of spacing blocks. 7 formed of wood or some other suitable in. sulating material. extends beyond the main body of the [commutator cylinder and provides a supporting means forthe fend portions'5 of the commutator bars 4, the cross-connectors 6 and the spacing blocks 7 which are heldthereagainst by means of banding wire 8 which is also insulated therefrom.

While I have described a commutator having equi-spaced bars projecting from the end of the commutator cylinder, it is obvious that irregularly spaced bars connected to points in the armature symmetrically dis posed electrically-may be connected together in the same manner to accomplish the same purpose.

From the foregoing description of what is shown in the drawing, it will be readily apparent that the cross connectors are readily accessible for repair and are provided with a firm and rigid support.

While I have shown and described my invention in its preferred form, it will be obvious to those skilled in the art that it is not so limited but is susceptible of various minor changes and modifications without departing from the spirit thereof, and I desire, therefore, that only such limitations The supporting sleeve 3 I shall be placed thereupon as are imposed by the prior art or are set forth in the appended claims.

I claim as my invention:

1. In a dynamo-electric machine, con ducting bars and alternately disposed nonconducting bars constituting a hollow commutator cylinder, and a supporting sleeve located within said cylinder, a plurality of said conducting bars being uniformly spaced and projectin from one end of said cylinder, and cone uctors mounted on said supporting sleeve and connecting the ends of equi-potential projecting bars, said conducting bars and said conductors being disposed at the same distance from the center.

2. In a dynamo-electric machine, con ducting bars and alternately disposed nonconducting bars constituting a hollow conimutator cylinder, a supporting sleeve located .within said cylinder, a plurality of said conducting bars being uniformly spaced and projecting from one end of said cylinder, spacing blocks of insulating material located between said projecting bar ends and conductors connecting projecting bar ends of equal potential, said conductors and said spacing blocks being mounted on, but insulated from, said supporting sleeve, and banding material surrounding said projecting ends and said end-connecting conductors.

3. In a dynamo-electric machine, c0nd'uctingbars and alternately disposed nonconducting bars constituting a hollow conimutator cylinder, a sleeve provided with a flange at its outer end disposed within said cylinder, a: plurality of said conductor bars being uniformly spaced and projecting from one end of said cylinder, insulating blocks dis osed between said projecting portions, an conductors disposed adjacent the ends of said bars and connecting certain of them, the projecting portions of said conductors and the said connectors being supported upon but insulated from said sleeve and supported between said insulating blocks and the flange on said sleeve.

4. In a dynamo-electric machine, conducting bars and alternately disposed nonconducting bars constituting a hollow commutator cylinder, a sleeve provided. ,with a flange at its outer end disposed within said cylinder, a plurality of said conductor bars being uniformly spaced and projecting from one end of said cylinder, insulating blocks disposed between said projecting portions, and conductors disposed adjacent the ends of said bars and connecting certain of them, the projecting portions of said conductors and the said connectors being supported upon said sleeve and supported between said blocks and the flange on said sleeve, and a continuous layer of insulation material disposed intermediate said projecting bars and said sleeve, said connectors and said. sleeve, said connectors and said flange, and on the outer periphery of the cylinder formed by said connectors and said projecting bars.

5. In a dynamo-electric machine, a commutator cylinder comprising a plurality of alternately disposed conducting and insulating segments and a V-ring disposed within said cylinder, a plurality of said conducting segments being uniformly spaced and projecting from one end of said cylinder, conductors mounted adjacent said projecting ends and connecting together certain of them, said conducting segments and said conductors being disposed at the same distance from the center, and a sleeve integral withsaid V-ring disposed within said projecting segment ends and said conductors and supporting the same.

In testimony whereof, I have hereunto subscribed .my name this 29th day of Dec.

CHARLES W. STARKER.