US1018571A - Dynamo-electric machine. - Google Patents

Description

`B. G. LAMME.

DYNAMO ELECTRIC MACHINE.

APPLIQATION FILED 1113.10, 190s.

Patented Feb. 27, 1912.

WITNESSES:

ATTONEY LuLl'MmA I'LAxoGHAl-n mGToN. l. r.

UNITED STATES PATENT OFFICE.

SIGNMENTS, TO WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, OF EAST PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

DYNAlVlO-ELECTRIC MACHINE.

Application filed April 10, 1908.

Specification of `Letters Patent.

Patented Feb. 27, 1912.

Serial No. 426,335.

To all whom t may concern:

Be it known that I, 'BENJAMIN Gr. LAMME, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Dynamo Electric Machines, of which the following is a specification.

My invention relates to dynamo-electric machines, and it has for its object to provide a simple and improved means for so sustaining the coils, of the rotating parts of such machines against the action of centrifugal force, that the construction shall interfere, to a minimum degree, with proper ventilation of the coils.

The rotating members of dynamo-electric machines, as usually constructed, comprise substantially cylindrical core members having peripheral slots in which the coils are located. In order to sustain the portions of the coils which project beyond the ends of the core slots against the action of centrifugal force, band wires of steel or other suitable material have been usually tightly wound around such portions. It has often been found necessary, particularly in the construction of high speed machines, to wind so many turns of band wire over the coils, for the aforesaid purpose, as to materially interfere with proper ventilation.

According to my present invention, the aforesaid difficulty is entirely overcome by employing a plurality of strips or blocks which are spaced apart and are arranged on the outer surfaces of the end portions of the coils in such a manner as to adequately support the coils when band wires are securely drawn around them.

Figure 1 of the accompanying drawings is a sectional elevation of a portion of the armature of a dynamo-electric machine which embodies my invention. Fig. 2 is a plan view of the parts shown in Fig. l, and Fig. 3 is a detail view showing the airspaces between the band wires and the winding.

Referring to the drawings, the device illustrated comprises a substantially cylindrical core member 1 having a plurality of peripheral slots 2 in which coils 3 are located. The core member l is preferably laminated, being built up of sheet metal parts which may be mounted directly on the shaft or upon the rim of a spider casting 4:, in the usual manner.

The coils 3, as shown in Fig. 2, are of diamond type and extend beyond the ends of the core slots to form a hollow cylinder of conductors which is supported interiorly by a ring 5 that is-connected with a clamping end ring 6 of the core member by radial webs 7. Bent insulating strips 8 which constitute an insulating ring are interposed between the outer surface of the ring 5 and the inner surface of the hollow cylinder formed by the end portions of the winding.

A plurality of blocks or strips 9 are uniformly disposed around the outer surface of the aforesaid hollow cylinder and are substantially parallel to each other, being in `alinement with the core slots, in the arrangement shown lin Fig. 2. The blocks 9 are held in position by band wires 10 located in recesses 11 which are provided for this purpose in the outer edges of the blocks or strips 9. By this means the ends of the coils may be firmly held in position without excluding the outside air which may pass through ducts or openings 12 formed between the blocks or strips 9 and under the band wires 10. The blocks 9 may, of course, be disposed in any convenient and suitable manner, to be largely determined by the normal operating speed of the armature or other rotating part to which they are applied.

Modilications in size and arrangement of details may be effected within the scope of my invention, and I do not wish to be limited to the form of winding or the armature struct-ure which I have illustrated in the drawings.

I claim as my invention:

l. In a dynamo-electric machine, the combination with a 'rotatable slotted core member, and coils located in the core slots and having projecting ends that are angularly disposed and spaced apart, of a plurality of turns of band wire surrounding the projecting portions of the coils, and longitudinally disposed insulating blocks or strips having recesses to receive the band wires and spaced apart for improving the ventilation of the winding.

2. In a dynamo-electric machine, the combination With a rotatable slotted core meinber, and coils located in the core slots and having projecting ends that are angularly disposed and spaced apart to forni an open- Work cylinder7 of an internal supporting ring` for the outer end of said cylinder, circumferential bands surrounding said cylinder, and spaced longitudinally disposed insulating strips interposed between said bands and said cylinder and having recesses to l0 receive the bands.

In testimony whereof, I have hereunto subscribed my name this 27th day of March,

BENJ. Gr. LAMME. itnesses ELIZABETH LrVINGsToNE, BIRNEY HINES.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.

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