US 669573 A
Description (OCR text may contain errors)
No. 669,573. Patented Mar. I2, |901. A. R. BLISS.
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(Application filed June 25, 1900.)
UNiTnD STATES PATENT OFFICE.
AMOS Pt. BLSS, OF LOVELL, MASSACHUSETTS, ASSIGNOR TO THE NEV ENGLAND MOTOR COMPANY, OF MASSACHUSETS.
SPEGI'FCATON forming part of Letters Patent No. 669,573, dated March 12, 1901.
Application filed June 25, 1900.
Be it known that I, AMOS lit. BLISS, of Lowell, county of Middlesex, and State of Massachusetts, have invented an improvement in Dynamo-Electric Machines, of which the iollowing description, in connection with the accom panying` drawings, is a specification, like letters on the drawings representing like parts.
The present invention relates to a multipolar dynamo-electric machine, and is embodied in a novel construction and arrangement of the field-frame and armature-support whereby the armature and its support are practically independent of the held-frame and adjustably connected therewith, so that the said armature and its support may be adj ustably connected with the said frame and the armature properly positioned with relation to the field-magnets without special f1tting.
ln accordance with the invention the armature support or spider, as it may he termed, contains the armature-bearings and has three or more supporting` members adapted to engage the field-frame between the pole-pieces, so as to properly center and support the armature without interfering with the said polepieces, the said spider being adj ustably eonnected with the field-frame. By arranging the several supporting members to correspond with the spaces between the pole-pieces, which project inward from the field-traine, and providing the said Field-frame with fastening devices or openings to receive fastening devices between adjacent pole-pieces the said frame may be set up in any desired position-t'. e., on the floor, wall, or ceiling-and the armature-spider secured therein in such a way that one or more of the supporting portions will bear against the frame below the armature-bearing, so as to properly sustain the Weight of the armature, the other members insuring the proper centering of the armature-shaft.
Figure l is an end elevation of a dynamoelect-ric machine embodying the invention. Fig. 2 is a plan view of the saine, the fieldframe being shown in section to illustrate the manner of fastening the armature-spider; and Fig. 3 is an end elevation showing a modi- Serial No. 21.480. (No modelo iication in which the armature-spider is especially adapted for a machine having six polar extremities.
As herein shown, the held-frame a is cylindrical in shape, so as to be adapted for any number of pole-pieces, the said pole-pieces a2 being shown as secured to the said frame by means oi bolts a3 and projecting inward therefrom in the usual way, so that the polar extremities or pole-shoes d'1 will properly surround the armature b. The armature-shaft b2, in accordance with the invention, is supported in a spider o3, which is entirely independent of the Afield-frame a, but adapted to be secured thereto in such a way as to properly posit-ion the armature with relation to the polar extremities d". The said armai urespider is provided with three or more supporting portions haat least one of which projects downward to form the necessary strut or support, upon which the weight of the armature is mainly borne.
By properly spacing the Supporting portions lrl the said portions can be inserted endwise between adjacent. pole-pieces, and the whole armature-spider, thus properly supported and centered by the downwardly and laterally projecting` portions b4, respectively, can be longitudinally adj usted with relation to the frame to position the armature with relation to the magnetic Field. The projections b" are shown as in the forni of bows so as to surround the armature, and that part ol each bow which is parallel to the armature-shaft is provided with a slot Zr" te receive a bultos, Fig. 2, or equivalent fastening device, the slots thus providing for the longitudinal adjustment of the spider as a whole.
In Figs. l and 2 the invention is shown as embodied in a four-pole motor and in Fig. 3 as embodied ina six-pole motor, the construction of the spiderbeing substantiallyihe saine in both cases. ln a six-pole motor, as shown in Fig. 3, the armature-spider may be provided with four ot' the supporting portions b4, two of the said portions projecting downward, but being inclined from a vertical position, so as to straddle the lower-most pole-piece ot' the field-frame, it being obvious that the invention may be adapted for use with machines having` any desired number of poles.
By providing` the held-magnet frame with means for inserting suitable fastening devices between adjacent poles it is obvious that the said `frame may be set up in any position desired-that is, the base portion thereof may be horizontally secured to a ceiling or beam, with the frame projecting down- Wardly,or may be verticallysecu red to a Wall* and in any case the armature-spider may be so inserted as to properly support the armature Without disturbing any part of the frame. In any position of the armature-spider there will be substantially vertical supports to mainly sustain the weight of the armature and lateral supports to properly center the same with relation to the polar extremities of the Held.
I claiml. The combination With the field-magnet frame of a dynamo-electric machine; oli' an armature support or spider adapted to be slid endwise into the frame and having three or more projecting members adapted to engage the inner surface of the said frame to thereby properly center and support the armature with relation to said frame, as set forth.
2. The combination with the field-magnet frameol'l a dynamo-electric machine, provided with inwardly-projecting pole-pieces; of an armature support or spider provided with three or more projecting members so spaced as to engage the said frame between adjacent pole-pieces to properly center and support the said armature, the said support or spider thus being removable endwise with out removing or displacing the field-magnets or polepieces thereof.
3. The combination with the field-magnet frame of a dynamo-electric machine; ol an armature support or spider having three or more points of support adapted to engage the said field-magnet frame between the inwardlyprojecting pole-pieces, the frame being arranged to receive fastening devices between adjacent poles; and means for longitudinally adjusting the armature support or spider with relation to said Field-magnet frame, as set forth.
4:. The combination with the field-magnet frame of a dynamo-electric machine; of an armature support or spider having bearings for the armature; and three or more bowshaped members extending vfrom one bearing to the other around the aru'iature; the outer surfaces of said members fitting the inner surface of the field-magnet frame, as set forth.
In testimony whereof l have signed my name to this specification in the presence ol two subscribing witnesses.
AMOS It. BLISS.
NANCY P. Fono, HENRY J. Limi-moan.