US395260A

US395260A - beldixcr

Info

Publication number: US395260A
Authority: US
Publication date: 1888-12-25
Anticipated expiration: 1905-12-25

Description

7 (No Model.)

W. S. BELDING-- ARMATURE FOR DYNAMO ELECTRIC MACHINERY. No. 895,260. Patented Dec. 25, 1888.

wa /dew v ZF7ZU67ZZZI' UNITED STATES PATENT EETCE.

WARREYS. BEIIDIXG, OF CHICAGO, II.I.IX( I ARMATURE FOR DYNAMO-ELECTRIC IVIAClHNERY.

SPECIFICATION forming part of Letters Patent No. 395,260, dated December .25, 1888.

Application filed Morel: 22, 1888. Serial No. 268,066. (No model.)

cago, in the county of Cook and State of Illil nois, have invented certain new and useful Improvements in Armatures for Electric Motors and Dynamos; and I do hereby declare the following to he a full, clear, and exact dei scription of the invention, such as will enahle others skilled in the art to which it appertains to make and use the same, reference heing' had to the accompanying drawings, and to letters or figures ot' relerence marked thereon, which form a part of this specification.

This invention relates to a hollow cast-iron core for armaturcs for electric motors and dynamos. I have ascertained that a greater et'tieiency may be attained by the use of a hollow core. By the use of such a core the generation of Foucault currents is reduced and the magnetic effect is concentrated in and near the surface of the core in close proximity to the field-magnets.

In the accompanying drawings, Figurel is a side elevation of one form in which my improved core may he made. Fig. 9 is a side elevation of one of the segments of the core shown in lrig'. I. Fig. 3 is a section through and in the direction of the axis of the armature.

An inspection of Fig. 3 will disclose the fact?- that the core is divided at right angles to its axis. The parts formed by this division are I By thus dividing the core each l lettered A A.

part A is (unless divided transversely, as

hereinafter set. forth) a complete ring open all along one side, and may he cast in an ordinary sand mold.

In Fig. 2 onehalti ol. one of the parts A is shown, the open sideheing' d i rect'ed toward the eye. Il'ithout making this d ivision it wouldhe a ditti cult. matter to cast the core; hut when the division is made any numher of patterns" for said parts may he put on a gate and cast in the common way.

The core may he said tohc a ring-Form shell divided or cut transversely to its axis to constitute two parts hol sides. It may he uniform in thickness throughout its circumterence to form a ring lowed at their meeting:

of the Grammc type, or it may have the polar extensions A, which may or may not he hollow. The drawings show them hollow. \\'hen these said parts A A are placed against each other, the core is completed, and the coils I) may he wound upon it. When said coilshave hcen applied, t'lu' yhold the parts A A togctlun'.

The ring may now he mounted upon a shall" in any suitahle manneras, for example, hy means of two spiders, t having their arms secured at the polcsol the ring. Each of the parts A may also he divided radially into two or more parts, forming a segment of the ring. Fig. 2 shows such a segment, the division extending th rough diamet rical ly-o iposite poles, and Fig. 13 shows th is transverse di vision made in the same manner. \Vhcu this transverse division is made, two segments ot the parts'A A may he ln'oug'ht together-to complete a segment of the core and wound. The segment of the entire core may thus he huilt up scparately and afterward united end to end to complete the ring. It will he understood that these mecting' ends may he nnitcd in several ways. In Fig. 1 the arms ot the spidersj,

are hroad enough to extend over said ends, aml two screws, t", pass through the arms, one into one and the other into the other end or" the segments. The dotted lines indie-rte the line in which the ends of the segments meet.

The screws may pass from one spiderarm into the opposite one through the parts A A, thus securing said parts against movement upon each other. This may ol' course he accomplished in other ways.

buitahlc insulation may he intcrposct'l hetwccn the parts A A.

I am aware that it is not new in the art to eonstrtu-t hollow iron armaturea-ores, and I do not claim,hroadly, all t'ormsol hollow cores.

I claim as my invention 1. A hollow cast-iron armaturc-corc composed of the annular parts A A, hollowed at their meeting sides, suhslantially as shown and ('lescrihed.

2. A hollow cast-iron. armature-core composed ot the annular parts A A, hollowed at their meeting sides, said parts hcing divided transversely into segments, suhstantially as shown and d escrihcd.

3. The comhination, with ahollow cast-iron armaturc-core composed ot the annular parts A A, hollowed at their meeting sides, of one or more spiders having arms attached to said core, substantially as shown and described.

t. The combination, with ahollow eastiron armature-core composed of the annular parts A A, hollowed at their meeting sides, of two spiders, C C, applied to each side of said core and having their arms secured to the poles of said core, substantially as shown and described.

5. The combination of a hollow east-iron armature-core composed of the annular parts A A, hollowed at their meeting sides, divided transversely into segments, of one or more spiders, C, the meeting ends of said segments being secured to the adjacent spider-arms, substantially as shown and described.

(5. A hollow east-iron armature-core composed of the annular parts A A, hollowed at their meeting sides and having the polar extensions A, sudJstantially as shown and described.

7. A hollow east-iron armature-core composed of the annular parts A A, hollowed at their meeting sides and having the hollow polar extensions A, substantially as shown and described.

8. A hollow cast-iron armature-eore composed of the annular parts A A, hollowed at their meeting sides and having the polar extensions A, said parts A A being divided transversely into segments, substantially as and for the purposes herein set forth.

9. A hollow cast-iron armature-core composed of the annular parts A A, hollowed at their meeting sides and having the polar eX- tensions A, said parts A A being divided transversely through the middle of said polar extensions, substantially as shown and described.

In testimony whereof I at'fix my signature in presence of two witnesses.

XVARREN S. BELDIXG.

TVitnesses:

CHARLES H. ROBERTS, CYRUS KEHR.