US729414A - Field-magnet structure. - Google Patents

Description

'No.729,414'. 4 PATENTIBD MAY 26;"1903.

' H. G. REIST.

FIELD MAGNET STRUCTURE.

APPLICATION FILED APR. 11, 1902. no MODEL. I I .QSHEETS-SH'EET 2 y Hnr' Gfieisb". bq

No. 729,414. Pa ented May 26, 1903.

UNITED STATES PATENT OFFICE.

HENRY G. REIST, OF SCHENEGTADSQ NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

FIELD-MAGNET STRUCTURE.

$PECIFICATION forming part Of Letters Patent N0. 729,414, dated May 26, 1903.

Application filed April 11,1902. Serial No. 192,357. (No model.)

To all whom it may concern: pole-tip is then put on and secures the coil in Be it known that I, HENRY G. REIST, a citiplace. This tip is preferably composed of a zen of the United States, residing at Schenecplurality of laminated units 5, the laminatady, county of Schenectady, State of New tions in each unit being secured by rivets 6, 55' York, have invented certain new and useful a plurality of such units being fastened side Improvementsin Field-Magnet Structures, of by side to the pole-pieces by transverse bolts which the following is a specification. 7. Each unit pole-tip is cut away on each This invention relates to dynamo-electric side, as shown, to correspond with projecting generators of the revolving field-magnet type; lugs 8 on the pole-pieces in accordance with 60 x0 and its object is to improve certain features the construction set forth in the patent to of construction whereby lateral and radial Thomson and Geisenhoner, No.571, l62,grantstresses on the field-coils are better resisted ed November 17, 1896. than heretofore. It is found that at high speeds the long coils The invention comprises braces secured are liable to vibrate, and in order to prevent 65 against the sides of the field-coils and collars this I apply a brace to the side of each coil. on the driving-shaft connected by a rabbet- The brace is a casting having two flat plates joint with the plates which support theends 9, adapted to fit against the adjacent sides of of the field-coils. The braces are fastened to two coils. In afour-pole machine these plates the 'body of the field-magnet structure, prewill make a dihedral angle of ninety degrees; 70 2o ferably by links fitting into undercut slots in but if the machine has more than four poles the braces and the body, and serve to prethis angle will be correspondingly altered. vent any lateral vibration of the coils with The plates are integral with a boss 10 and reference to the pole-pieces on which they strengthening-webs 11. The inner angle 12 are mounted. The rabbeted collars and end of the boss stands close to a beveled face 13 75 plates resist centrifugal strains and assist in on the body-hub between two adjacent shoulpreventing radial movement of the coils on ders 3. In this beveled face and in the boss the pole-pieces. 10 are cut registering slots 14 15, each having In the accompanying drawings, Figure 1 is an undercut or enlarged inner end. A link an end view of a four-pole revolving field- 16is driven into the slots, having a web 17 80 I magnet embodying myinvention. Fig. 2 is a to fit said slots and flanges 18 to fit the enperspective view of a link. Fig. 3 is a similarged ends thereof. If necessary, one .or lar view of a wedge; Fig. 4 is a side elevamore wedges 19 can be driven in over the tion, partly in section and partly broken flanges to insure afirm solid job. A sheet of away, of one end of the field-magnet. Fig. 5 insulation 20 may be placed under each plate 85 is an end view of the pole-tip. Figs. 6 and 7 before the links are driven in. are cross-sections thereof on the lines 6 6 7 7, The curved ends of the coils pass around respectively; and Fig. Sis a perspective view end plates 21, applied to each end of the pole of two of the units of which the hub and polepieces and secured in place by the bolts 7, pieces are composed. which fasten the pole-tips in place. To re- 0 40 On the driving-shaft 1 is mounted the body lieve the shearing strain 011 these bolts, due. of the field-magnet consisting of a center or to the centrifugal thrust of the coils and end hub and radial pole-pieces built up by as plates, when running at high'speeds and to sembling on the shaft a plurality of similar insure a solid immovable construction, I prounits 2, each composed of a given number of vide in each end plate a rabbet 22, concen- 5 5 sheet-iron laminations riveted together, as trio with the shaft, and on the shaft 1 place shown in Fig. 8. The structure illustrated a collar 23, having a fia'nge'24, which fits into has four field-poles; but it is evident that any the rabbet 22. The collar is held in place by desired number may be provided for. At a nut 25, screwed on the shaft. The square the base of each pole-piece is a shoulder 3 to engaging shoulders of the rabbet and the mo support a field-coil 4, which is wound on a flange resist all centrifugal strains on the end form and slipped on the pole-piece. The plates and coil. It is evident that the relative positions of the rabbet and flange may be reversed, if desired.

My improvements securely lock together the body and coils, so that a strong solid structure is produced and all vibration or displacement of parts is prevented.

I do not desire to restrict myself to the exact construction or arrangement of parts shown in the accompanying drawings, as the same may be varied and modified Without departing from my invention.

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

1. In a field-magnet structure, the combination With the coils, of braces applied to the sides thereof.

2. In a field-magnet structure, the combination with two adjacent coils, of a brace fitt ing the adjacent surfaces thereof.

3. A brace for field-magnet coils, comprising two plates making a dihedral angle, a boss and strengthening-webs integral therewith, and an undercut slot in said boss.

4. In a field-magnet structure, the combination with a hub, of pole-pieces and coils, braces applied to said coils, and means for fastening the braces to the hub.

5. In a field-magnet structure, the combination with a hub having undercut slots, of pole-pieces and coils, braces applied to said coils and having undercut slots, and links engaging with said slots.

6. In a field-magnet structure, the combination with a hub having beveled faces containing undercut slots, of pole-pieces and coils, braces fitting between adjacent coils and provided with undercut slots, and links each having a web and flanges to engage with said slots and fasten the braces to the hub.

'7. In a field-magnet structure, the combination with the pole-pieces and coils, of end plates between the coils and pole-pieces, and collars connected with said end plates by rabbet-joints.

8. In a field-magnet structure, the combination with the pole-pieces and coils, of end plates between the coils and pole-pieces, and collars connected with said end plates by rabbet-joints concentric with the axis of rotation of the structure.

9. In a field-magnet structure, the combination with an end plate for a coil, havinga rabbet concentric with the driving-shaft, of a collar having a flange fitting into said rabbet.

In witness whereof I have hereunto set my hand this 0th day of April, 1902.

HENRY G. REIST.

Witnesses:

BENJAMIN B. HULL, HELEN ORFORD.

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