US956554A - Dynamo-electric machine. - Google Patents

Description

J. E. WEBSTER 32; J. LE 0. DAVIS.

DYNAMO ELECTRIC MACHINE. APPLICATION FILED MAR. 9, 1908.

Patented May 3, 1910.

2 SHEETS-8HEET 1.

ATTORNEY J. E. WEBSTER & J. LE 0. DAVIS. DYNAMO ELECTRIC MACHINE.

APPLICATION FILED MAR. 9 1908. w 95 ,554, Patented May 3, 1910.

2 SEEETSSHEET 2.

WITNESSES: vEN;0Rs 1F I 1.9%

7ATT0'RNEY UNITED STATES PATENT OFFICE.-

J'OHN WEBSTER AND JOSEPH LE CONTE DAVIS, OF PITTSBURG, PENNSYLVANIA,

ASSIGNORS, BY MESNE ASSIGNMENTS, TO WESTINGHOUSE ELECTRIC & MANUFAC- 'roame COMPANY,-A ooaroan'rron or rannsnvamx.

Srmcifice tnu of Letters Patent.

DYNAMIC-ELECTRIC MACHINE.

Patented May 3, 1910.

Application filed March 9, 1908. Serial No. 420,075.

To all whom it may concern:

Be it known-that we, JOHN E. Wnes'ran and J osnrrr LaCon'ra Dav s, citizens of the United States, and residents of Pittsburg, in, the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in D namo-Elect-rie Ma- Q chines, of which the .fo lowing is a specification. I

Our invention relates to dynamo-electric machines having stationary field 'magnetwindings, and it has 5 eclal reference to railway motors and simi ar machines which are provided with 'field magnet frames that two parts in a substantially horizontal plane.

' through or near the axis of its armature.

If a motor of this character is provided with interpolar magnet project ons, the interolar windings or coils are liable to be in uredi by the relative movement of the two halves 'of the frame or casing. The foregoing statement is, of course, most applicable to railway motors having the usual fourpole field frame construction, since two of the interpoles are intersected by the dividing line'of the field frame in such cases.

'According to our present invention, we

divide the field frame of the motor in a 'lane which forms a'small angle with the y orizontal and interpose a steel spring mem- "ber between the auxiliary magnet coils and the motor frame and also provide improved means for holding the interpolar windings in osition.

igure 1 of the accompanying drawings is a artially sectional elevation of a dynamoectric machine embodying our invention, and Figs views on a. rger scale of supporting and protectingdevioes for the auxiliary coils of the machineshown in Fig. 1.

Referring to the drawings, the device here illustrated comprises a field magnetframe l .riveted to the ends of the side strips.

of the strips 21 and 22 has a flat middle portion23 and outwardly curved side wings 2,3, 4, 5, 6 and 7 are detail '24 and'25 the-curvature of which correwhich isdivided into two parts 2 and- 3 that vided with a plurality of main field magnet projections comprising relatively short base portions 4 which are integral with the frame 1 and have circumferentially curved faces (3,

and removable body members 7 which are clamped against the faces 6 by bolts 8. The interpolar project-ions similarly comprise base portions 5 which are integral with the frame 1 and body portions 10 which are relatively narrow and are located in radial planes substantially halfway betweentwo adjacent main oles. The main and auxiiliary polar pro ections are respectively provided with ma netizing coils 11 and 12.. a

The free ends of the auxiliary polar projections are provided with plates 13 which are preferably formed of brass or other nonmagnetizable sheet metal punchings having lateral flanges which are secured to the pole by rivets 14 and serve to hold the coils 12 in position.

In Fig. 7 I have shown a blank from which the member 13 is formed by bending the edges adjacent to the central slit outwardly to form lateral flanges and by making rivet holes in said flanges.

Spring frames 15 are interposed between the circumferentially curved faces 9 of the projections 5 and the coils 12 for the urpose of roteeting the outer surfaces o the coils on for guiding the two portions of'the field frame together after they have been separated for inspection or for otherpurposes. As above indicated, the two parts 2 and 3 are hinge-connected by projections 16 and 17 and a pin or shaft 18. a

One of the spring frames 15 is illustrated in detail in Figs. 3, 4 and 5, to which special reference may now be had. Each frame 15 comprises two curved side strips 19 and 20 and transverse strips 21 and 22 which are Each sponds substantially to that'of the faces 9 of the pole piece projeetions 5.

The frames -1'5 are located upon the respective auxiliary pole piece members .10,

the. spring action of the side strips 19 and .20 being such as to clamp the coil 12 against the member 13; Since the curvature of the wings 24. and 25 of the frames 15 corresponds to that of the faces 9, .the frames pertaining to the auxiliary ole pieces which are located adjacent to tlie plane of division of the frame 1 will serve to protect the corresponding coils 12 from in ury and the wings 24 and 25 will insure proper engagement of the frame parts 2 and 3 as they are given relative'movements toward or away from each other upon the hinge 10, 17, 18.

It will be understood thatmoditications in size and arrangement of parts may be made without departing from the spirit or scope of our invention, andthat the invention is not limited to the specific type of dynamoelectric machine illustrated.

We claim as our invention:

1. In a dynamo-electric machine, the combination with a magnetizable frame havin a plurality of main polar projectionsanil auxiliary or interpolar pro ections secured to the frame between the main projections, saidframe being divided into two parts and hinge-connected, of coils for the interpolar pro ections and resilient means for supporting the coils across the dividing plane of the field frame.

In a dynauto-electric machine, the combination with a magnetivlable frame comprising two hinge-connected parts and a plurality of polar pro ections, and coils mounted on the projections, of means for supporting the coils and for guiding the frame sections when they are swung on their hinges.

3. In a dynamo-electric machine, the combination with a magnetizable frame comprising twohinge-connected parts and having a plurality of )olar projections adjacent to the plane of division in the frame, of coils for said projections and resilient means for supporting the coils and for maintaining a predet'eriiiined relative position between the two parts of the ame.

4. In a dyiiamo-electric machine, the combination with a field magnet frame having polar projcctions and coils, mounted on said projections, of spring frames having side and end strips which are curved in opposite 6. In a dynan1oelectrie machine, the combination with a magnetizable frame divided into two hinge-connected parts, a plurality of main polar projections secured to the frame and equally spaced on the two parts of the frame and. auxiliary or'inter olar dpro(jec- I tions located one on either si e an jacent to the dividin plane of the frame, of coils mounted on tile polar projections and i'esilieiituneaiis interposed between the coils on the auxiliary projections and the frame for su porting the coils and for maintaining a pre etermined relation between the two parts offthe frame.

7. In a dynamo-electric machine, the oombination with a inagnetizable frame divided into two hinge-connected parts, a lurality of main )olar rojections secure frame an equal y spaced on the two parts of the frame and auxiliary or interpolar projections located one on either side and adjacent to the dividin plane of the field frame, of coils mounted on the polar projections and resilient means interposed between the coils on the auxiliary projections and the frame for supporting the coils and to the for maintaining a predetermined relationbetwecu the two parts of the frame, said means comprising a substantially rectangular frame 'havm side strips and end strips bent in opposite directions out of the plane of the rectangle.

[n testin'lony whereof, we have hereunto subscribed our names this 27th day of F eb JOHN E. WEBSTER. J ()8. LE CONTE DAVIS.

W it nesses ll. 1). Drone, Bnuvm' HINES.

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