US896321A

US896321A - Field-magnet structure.

Info

Publication number: US896321A
Application number: US26494005A
Authority: US
Inventors: Henry G Rest
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 1905-06-12
Filing date: 1905-06-12
Publication date: 1908-08-18
Anticipated expiration: 1925-08-18

Description

No. 896,821. PATENTED AUG. 18, 1908 v H. G. REIST.

FIELD MAGNET S TRUOTURB. APPLICATION FILED APR,16,1902. RENEWED JUNE 12, 1905.

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' No. 896,321 PATENTED AUG-18, 1908@ H. G. REIST.

' FIELD MAGNET STRUCTURE.

APPLICATION FILED APR. 16, 1902. RENEWED JUNE 12, 1905.

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NEW-YORK, ASSEGNOB To GENERAL 'stacrnic COMKANY, A CORPORATION OF'N EW YORK.

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Application filed 16, im, Eerie. E9. 103,101 Renewed June 12, 1905.

Bpecifi'cation of Letters Patent.

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Be it known that I, Planar G. Rsrsr, a residing at Schen- Schenectady, Eitate of and useful Improvements in Field-Magnet Strucfollowing is a specificaectady, county of tion;

This invention relates to the field-1nagnets of dynamo-electric machines, and particularly to those in which the-field-magnet roarmature remains stationary. In machines of thistype, particularly those adapted to generate or utilize alternating currents, it is necessary or preferable for the fieldmagnet structure to be laminated. It is a matter of extreme difiio'ulty to produce such a structure which wilhpermit removable field- 7 magnet coils to be use and yet will be strong an compact and capableof resisting centrifugal and other strains when rotated at high cede- In the best form of my invention 1 use a field-magnet structure built up of lamina alternate circumferential tongues and grooves, and the polepieces having alternate long and short portions forming tongues and grooves which inrality of long and tudinal terlock with those of the body and are fastened thereto through registering slots in said interlocking tongues. The body herein shown is built up of polygonal disk-shaped laminations grouped in units, each unit being composed of a given number of laminations united together. The units are made in assembling a plurality of them on a shaft in' alternatesuccession, a body is formed having a polygonal suriace containing alternate circumferential tongues and grooves. 'lhe pole-pieces are similarly composed of a plushort units alternately. arranged so as to form tongues and grooves which will interlock with those of the body,

each unit being made of laminations riveted together. T he tongues have transverse keywavs'slotted through. them to receive longiloclring keys .which fasten the polepieces to the body. The coils are held on the pole-pieces by U-sh pod clips whose ends have slots engaged by said longitudinal keys.

In the accompanying drawings, Figure 1' :"is an end view of a ficldunagnet structure embodying my invention, showing only three by longitudinal keys driven tivly in Figs. 8,9,10

two sizes, so that by in place; Fig. 2- is polepieces andcoils inal sectional elevation on the line 2 2,.

gitii Figs. 1 and 3; Fig. 3 is a topplan sectional.

view on the line 3 3, Fig. 2; 1g. 4 is an end view of one unit of the body or central portion; Fig."5 is a sectional view of the same; Figs. '6 and 7 are'similar views of another body unit Fig. 8 is an endview and Fig. 9 a section of one unit of the pole-pieces; Figs. 10 and 11 are similar views of another olepiece unit; Figs. 12, 13 andl l show mo iiied constructions of pole-piece units; Fig. 15 is a pers x pole-precesto the body; Fig. 16 is top plan view of an end plate for a poleiece; and Fi 17 is a perspective view of t e clip for he ding the coils on the pole-pieces.

The body of the fieldmagnet is composed of a plurality of alternately large and small polygonal disk-shaped um'ts 1 2- having central o enings 3 to fit on a driving-shaft. Each isk or unit is composed of a group of sheet-metal laminations riveted together. When assembled, the disks constitute polygonal. body whose faces are inadc up of alternate circumferential tongues and grooves.

The pole-pieces are composed oi alternate long units 4 and short units 5, shown rospecand 11. Each unit is made up of a grou of similar lamination-s riveted together. he plurality of long and short units constitutinga pole-piece are 'lirmly secured together by rivets 6 passing through all of them.

Instead of using separate long and short units, each unit may be built up of long and short laminations grouped, as shown in Fig. 12 or Fig. 13 or Fig. 14, and riveted together. A plurality of similar units, such as shown in any one of those figures, will produce a polepiece having alternate tongues and grooves adapted to fit on a face of the body portion, and interlock with the tongues and grooves thereof. When a )olopiocc built up from any'oi the above ooscrlbed units is placed upon a face of the body portion, the long units 4 enter the grooves and rest upon the edges of the small. dislis 2, while the short units '5 rest on the edge of the large disks 1-. Long keys or wedges 7 are then driven through registering slots 8 in the disks 1 and the long units 4, and firmly secure the"polepieces in place.

a lonective view of a key for fastening the ion the latter are applied to the ho The insulated field-coils 9, of a height totightly fill the space between the pole shoulders and the edges of the larger core disks 1, as shown in Fig. 1, are'wound on a form and slipped over the pole- )ieces before cly. To hold them securely, a U-shaped clip 10 is passed down over each end of the coil, said cliphaving long ends which enter two of the grooves in the body-portion and have slots .11 through which the long keys or Wedges 7 pass. .The clip is preferably made of laminations riveted together. Between the top of the coil and the bi ht of the clip I prefer to insert a fillin -blocl;12 having its middle portion 13 roun ed to fit the clip, and its ends 14 shouldered to engage theedges of the clip and retain it in place. I

It will be seen that a field-magnet structure made as herein shown and described is compact and solid, the coils are positively supported both top and bottom, and the entire structure has great strength to resist centrifugal and torsional strains, besides being easily and quickly assembled, or taken apart for repairs. Each pole-piece and its coil can be removed without disturbing the others by merely knocking out the 10ngitudi-. nal key which secures the clips and the polepiece.

What I claim as new and. desire to secure by Letters Patent of the United States, is-

l. A field magnet structure comprising a body made out of a plurality of'units, each of said units consisting ofa number of laminae secured together.

2. A field-magnet structure composed of a plurality of and small laminated units.

3. A field-magnet structure having a body composed of a plurality'of alternate large and small disks, each consisting of-laminations secured together.

4.. A field-magnet structure having a body composed of a pluralityof alternate large and small polygonal disks, each consisting of laminations secured together.

5. A field magnet structure having a body composed of alternate large and small polygonal units each comprising a plurality of having a body alternate large laminae riveted together, and means for securing' said-units in fixed relation.

6. "A field-magnet structure having a body composed of polygonal laminated units grouped to form alternate circumferential tongues and grooves.

.i 7. A field-magnet structure having a body composed of laminated units grouped to form circumferential tongues and grooves.

8; A field magnet stru ctu e comprising a pole piece made up of a plrality of units, each of said units consistingof a' number of lamina: secured together. i

9. A field-magnet pole-piece composed of a plurality of long and short laminated units.

10. A field-magnet pole-piece composed of a plurality of alternate long and short laminated units.

11. A field-magnet pole-piece composed of a plurality of alternate long and short units, each consisting of laminations secured together.

12. A field magnet structure comprising a body and pole pieces, each made up of a plurality of units, each of of a number of laminae secured together.

13. A field-magnet structure comprising a body and pole-pieces each made up of a plurality of laminated units, with interlocking portions.

14. field-magnet structure comprisin a body and a polepiece each made up of a urality of laminated units, and having a ternating interlocking tonguesf 15. A field magnet structure comprising a body and a pole-piece each made up of a plurality of laminated units of different sizes and thicknesses whereby said parts are adapted to interlock with clearance.

16. A field-magnet structure comprisin a body and a pole-piece each made up of a plurality of laminated units having alternating interlocking tongues, and a locking key passing through said tongues. 17. A field-magnet structure comprising a body having grooves, a poleiece, a coil on said pole-piece, clips on sai coil entering said grooves, and means for fastening said clips to said body.

18. A-field-magnet structure comprising a body havin circumferential grooves, a polepiece, a coi on said pole-piece, a U-shaped cli-p passing down over the end of said coil into said grooves, and means for fastening said oh to said body.

body having circumferential tongues and grooves and a' keyway slotted transversely through said tongues, a tongues entering between the body-tongues, a coil on said poleiece, a U-shaped clip passing down overt e end of said coil into two of said grooves, and a key passing through the tongues and clip.

20. A field-magnet structure consisting of a bod composed of alternate large and small aminated units, ole-pieces consisting of alternate long and siort laminated units on said pole-pieces, U-shaped laminated into said body, and longitudinal keysdriven through slots in the interlocking body and pole-piece'units and the ends of the clips.

21. A field magnet structure comprising a body formed with grooves or recesses, a pole piece carried by said body, a coil on said pole piece, coil. retaining clips entering said grooves or recesses for fastening said clips to said body.

said units :9ns1sting pole-piece having clips passing over'the ends or" said coils and and interlocking with the body-units, coils 22. Afield magnet strueture eomprising a body formed with grooves or recesses, a pole piece carried by said body, a coil on said pole piece, U-shaped coil retaining clips the ends of which enter said grooves or recesses, and

- means for fastening'said clips to said body.

23. In combination, a laminated bod formed with grooves or spaces, a )010 piece carried thereby, a coil on said pole piece, a laminated U-shaped coil retaining clip the ends of which enter said grooves or spaces, and means for securing said ends to said body.

24. A revoluble field-magnet structure having a laminated body portion, a plurality of laminated poles secured thereto each provided with an exciting eoil, means eonneeted to the. poles for holding the central portions of the coils against centrifugal force, and means independent of the poles for holding the respective end portions'iof the coils, saidlindependent means being fastened to said l body portion. In witness whereof, I have hereunto set my hand this 14th day of April, 1902.

I HENRY G. REIST.

\Vitnesses:

BENJAMIN B. HULL, HELEN ()RFORI).