US882242A - Cross connection for dynamo-electric machines. - Google Patents

Description

PATENTED MAR. 17, 1-908.

W. H. FOOT. "(moss GQNNEOTEION FOR DYNAMO ELEGTRIO MACHINES.

APPIIIGATLG-N-HEED APR.2s,190s.-

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fi ATTORNEY Gil - to the proper winding coils.

UNITED STATES FATE NT OFFICE.

WILLIAM lI. 'l()()l. ()l" WILKINSBLIRG, PENNSYLVANIA,

ASSIIJXUR T0 WESTINGHOUSE CROSS CONNECTION FOR DYNAMO-ELECTRIC MACHINES.

M invention relates to cross connections for r ynamo-electric machines and-it has, for its ob ect to providean improved meansfor interconnecting equipotential points in the windingsot' such machines as are subjected to relatively high speeds in operation, that shall occupy a relatively small amount of space and shall be adequately protected from is lacement or injury.

T he windings of the rotating arts of dynamo-electric machines are usua ly provided with cross connectors which comprise suitably insulated cables or similar connectors, the ends of which were electrically connected Connectors of this character occup a considerable amount of space and are liable .to be injured or displaced if the member of the machine with which they are employed is operated athigh speeds.

According to my present invention, the cross-connections comprise ring-shaped strap connectors of copper or other suitable material which are of unlike diameters, and are insulated from each other by insulating ribbons or strips and firmly supported by an annular case in which they areconcentrically mounted. Each set of coils that are to be interconnected are electrically connected with a single ring by means of short flexible conductors.

Figure 1 of the accompanying; drawings is an end elevation of a portion 0 the rotating member of'a dynamo-electric machine which is cross connected in accordance with my invention and Fig. 2 is a sectional elevatio of the parts illustrated in Fig. 1.

Referring to the drawings, a magnetizable armature core 1, h ing a winding 2, is provided with a combined end ring and coilsupport 3. The equipotential points of the winding 2 are interconnected by a lurality of strap rin conductors 4, termina s 5 and flexible con ucting strips 6, the terminals 5 Specification of Letters Patent.

Application filed April 28. 1906.

Patented March 17, 1908.

Serial No. 314,205.

being riveted to the armature coils and clamped and soldered to the outer ends of the strips 6 and the inner ends of the strips 6 being riveted to the rings 4. v

It will, of course, be understood that both rivets and solder or either alone may be employed for making each or any of the electrical connections just described, as may be found desirable in practice.

The ring conductors 4 are separated by,. insulating ribbons or strips 7 and are concentrically mounted in an annular case 8 which is fastened to the coil-supporting ring 3. The annular case 8 comprises a plate 9 having flanges 10 and i 1 at its inner and outer edges,

' respectively, and may preferably be mounted concentric with the axis of rotation of the rotating member of the machine. The inner flange-ll) is provided with a plurality of radial ad'usting screws 12.

A relatively still clamping ring 13 is interposed between the stra comluctors 4 and the inner flange 10 of the case 8 against which the ends of the adjust-ing screws 12 may act. After the strap conductors 4 have been assembled and pro ierl connected to the winding 2, they ma be clamped in position by tightening tie radial adjusting screws 12. A cover 14 may be fastene by screws 15, or otherwise attached, to the case 8 in order to prevent axial displacement of the cross connectors.

The strap rings 4 may be insulated from the plate 9 by means of a plate 16 of fuller board or similar material and from the clamping ring 13 and the flange 11' by insulating rin s 17, 18 and 19. Insulating plates 20 an 21 are alsointerposed, respectively, between the rin s 4 and the strips 6 and between the sai strips and the cover 14.

The strap conductors 4 are preferably made of sulficient length to overlap at their 95 ends so that the resistance between the connectors, located on op osite sides of the interruption, may be re uced, since the pressure exerted by the clamping ring 13 insures a ood electrical connection between the ends which are overlapped.

Although the arrangement of the cross connections is illustrated in connection with a machine which is provided with a com-- bined end ring and coil-support to which the 105 annular case is attached,.my invention is not limited to such arrangement and the casing may be supported in any other suitable manner.

I claim as my invention:

1. In a dynamo-electric machine, the combinationwith a substantially cylindrical core, and a winding therefor, of an annular case supported by the core structure, cross-connecting strap conductors concentrically disposed in said case, and insulatin rings and plates between which said conductors are clamped.

2. In a d amo-electric machine, the combination with a core, a inding and a combined clamping ring and coil-support, of an annular case attached to the core support, concentrically-disposed ring she eil strap conductors rigidly clamped in sai case, and strap leads between said conductors and suitable points in the winding.

3. In a dynamo-electric machine, the com- 'bination with a cylindrical core member and a winding, of concentrically mounted cros connecting rings for said winding, insulating strips between the cross-connecting rings, insulating rings and plates surrounding said connecting rings, and means for clamping said parts together and to said core member.

4. In a dynamo-electric machine, the combination with a core, a winding and a conbined clamping ring and coil support, of an annular case attached to the coil support, ring sha ed strap conductors concentrically mounte in said case to which suitable points in the winding are connected, inner, outer and intervening insulating rings and insulating side lates for said strap conductors, and a plura ity of radial adjusting screws located in afiange of the annular case.

5. In a dynamo-electric machine, the combination with an armature core and win ding, of cross-connecting conductors which interconnect equipotential points in the winding and comprise concentrically mounted strap conducting rings, insulating rings and plates between and around said conducting rings, anda casing in which said parts are clamped.

6. In a dynan'io-electric machine, an ar mature having cross-connecting conductors comprising annular concentric straps and radial flexible strips between said straps and the armature COIlS, in combination with means for insulating said parts and means for inclosin and clamping them in position.

, 7. In a dynamo-electric machine, an armature having cross-connecting conductors com nising annular straps, the meeting ends of which overlap, and flexible stri )s between said straps and the armature coils, in combination with means for supporting and insulating said connecting conductors.

S. In a dynamoelectric machine, an armature having crossconnecting conductors comprising concentrically dis osed annular straps and substantially 'ra ial strips between said straps and the armature coils, in combination with insulating means between and around the connectin conductors, and a casing in which said parts are closely fitted and c amped.

9. In a dynamo-electric machine, an armature having cross connectors comprising a \VILLIAM H FOOT.

/Vitnesses W. P. BALLARD, BIRNEY HINEs.

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