US432387A - enholm - Google Patents

Description

(No Modl.)- 2 sheets sheet 1.

0. A. BNHOLM. ARMATURB FOR DYNAMO ELECTRIC MACHINES.

Patented July 15, 1890.

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(Nb Model.) 2 Sheets-Sheet 2 0. A.-ENHOLM. ARMATURE FUR DYNAM-O ELECTRIC MACHINES.

No. 432,387. Patented-July 15, 1890.

AEHV 5,

UNITED STATES PATENT OFFICE.

OSCAR AXEI. ENlIOLM, OF NEIV YORK, N. Y., ASSIGNOR, BY DIRECT AND MESNE ASSIGNMJNTS, OF ONE-HALF TO JULIUS M. IlEYMAN, OF SAME PLACE, AND EMMANUEL DURET DE BRIE, OF COGNAC, FRANCE. I

ARMATU RE OF DYNAMO-ELECTRIC MACHIN ES.

SPECIFICATION forming part of Letters Patent No. 432,387, dated July 15, 1890.

Application filed November 23, 1889. $erial No. 331,349. (No model-l To all whom it may concern: dial spurs or projections, and the successive Be it known that I, OSCAR AXEL ENHOLM, disks are so disposed as to present said proa citizen of the United States, residing at New jections in an orderly spiral arrangement with York, in the county and State of New York, the result of presenting twice as many longi- 5 have invented certain new and useful Imtudinal groups or ranks of spurs as there are provemen-ts in the Armatures of Dynamodifferent kinds of plates. Thus with the four Electric Machines, of which the following is forms of plates shown in Fig. III there will a specification. be eight of such ranks of spurs, as represented My invention relates to an improved conin Figs. I and'II. With a core constructed 1o struetion of the armature-core of a dynamo- 011 my plan the entire substance of the core electric machine, and is more particularly debecomes the theater of lines of magnetic force.

signed for what are known as drum-arma- 1 may represent any suitable armaturetures, in which the winding is in meridional. shaft having a collar 2,against which one end planes about the exterior of a cylindrical core. of the armature core abuts, and having a The object of my invention is to so conserew-threaded portion 3 for a nut 4t,by which struct the armature-core that it shall eonstithe parts of the cores are firmly clamped totute a perfect magnetic bridge between the gether.

field-poles, and thus more effectually direct 5 is a brass or other non-magnetic sleeve,

and concentrate the lines of force upon and having an internal tongue 6, Which occupies 20 through the armature, and at the same time a key-seat 7 in the shaft, and having an ex be capable of a more ready magnetization and ternal groove 8 for the reception of lugs upon demagnetization as it revolves than are those the core lamimc, now to be described. The forms of cylindrical armature-cores that have core proper is built up of a multitude of simibeen heretofore employed. The construction lar plates, disks, or laminae 9 of some ferro- 2 5 is further such as to prevent the formation magnetic metal,preferably soft-charcoal iron.

of cross or false magnetic action in the core Each plate comprises a circular body or hub itself. 10, having a central orifice ll with an inte- Referring to the accompanying drawings, riorly-projecting lug 12, which, when the core Figure I is a perspective view of an armatureis put together, occupies the groove 8 of the 30 core embodying my invention, the polar-conbrass sleeve 5. Each plate has two diametnections and aportion of one of the non-magrically-opposite spurs or projections 13. The netic filling-blocks being omitted. Fig. II is four plates to b c d of any given series are an axial section of such arn'iature-core with precise fac-similes of one another, except its polar block-pieces. Fig. III represents that the lug 12, which in one plate a is in 5 fourconsecutiveplatesorlaminze,constituting line with one of these spurs, is in the suea series. Fig. IV is a perspective view of a ceeding plates 1) c (1, respectively, forty-live, modification of my invention. Fig. V is a ninety, and one hundred and thirty-live deperspective view of another modification of grees angular remove to the left of the firstthe invention. Figs. VI and VII are pernamed. The plates of the next series are 40 spective views of other modifications. arranged in like succession, and so on until a The above figures represent the naked arcore of the desired length is obtained. Be- 0 mature as it appears before application of tween every two consecutive plates is interthe wire. posed a Washer or gasket l4 of varnished In carrying out my invention I construct Manila paper or other non-magnetic mate- 45 the armature-core of a multitude of disks, rial. The plates which go to make up any plates, or laminae of soft iron, arranged side given diametrical plane or pair of longitudi- 5 by side with interposed non-magnetic gaskets nal ribs are, it will be seen, separated from or washers all at right angles to the shaft. one another by the thicknesses of three Each disk has two diametrieally-remote raplates and four washers. Each plate extends diametrically across from one side of the armature to the other, and is consequently adapted when revolving between the poles of the field-magnet to partially complete the magnetic circuit between said poles. As these plates are straight and any one of them of small mass, each is adapted to be promptly and completely magnetized and demagnetizethand an armature made up of a multitude of such plates is obviously capable of very rapid changes of magnetic condition. To assist in keeping the plate series at their proper angular or diametric displacement and to present a convenient cylindrical body for the wire windings, segmental blocks 15, of wood or other non-magnetic substance, maybe inserted. The spurs 13 form virtually polar prolongations of the armature-core. Soft-iron blocks or polar connections 18 may be interposed between the consecutive spurs of each rank and be fastened by a rod 19, occupying orifices 20 in said blocks and spurs.

The above-described form of armature-core is susceptible of various modifications. For example, the hub or annular portion 10 may, as in Fig. IV, be of such diameter as itself to constitute the cylindrical body for the wire winding, and to thus dispense with the wooden segments or filling-pieces 15; or a like object may be attained by wings or lateral expansion 16.

In forms like Fig. VI insulating-wedgessuch as 15'1nay be employed. The polar surface of each spur may be prolonged by a lip or lateral prolongation l7 concentric with the axis of rotation. The polar connecting-blocks 18 may have like lips or lateral prolongations, as shown at- 17, Fig. VI. The soft-iron polepiece 18 may be omitted, as in FigsLIV, and V. The tongues (or lugs) and the grooves may of course be reversed. For example, a tongue on the shaft may occupy a groove on the sleeve-bore, and a tongue 011 the sleeve may occupy notchesin the plates. The sleeve may be fastened in any other way to the shaft.

It is evident that the construction of the individual plates may be so modified as to make the number of longitudinal ranks of spurs of any even quantity, less or greater than eightsuch as, for example, four, six, ten, or twelve. The disposition of the tongues on the individual plates a b c (1 may be such as to group them in a left-hand instead of a right-hand spiral arrangement here shown. It is further evident that on a core such as hereinabove described the winding may be either longitudinahas specified, (that is to say, meridionally over and over the whole core;) or the armature-wire may be wound helically about each rank of spurs in the form of sepa rate bobbins with radial axes constituted by the respective rank of spursone rank to each bobbin.

\Vhat I claim as my invention is- 1. An armature-core for a dynamo-electric machine, formed of a number of separate plates, bars, or rods of iron extending diametrically across from one side of the armature-core to the other and arranged in diiterent diamctrical planes.

2. An armature-core for a dynamo-electric machine, formed of a series of plates of thin sheet-iron connected to the same shaft and extending diametrically across from one side of the armature to the other, said plates having each two diametrically-projecting spurs, and being so fixed as to present said spurs in different angular positions in groups or series, as shown.

3. An armature-core for a dynamo-eleetric machine, formed of a number of plates of thin sheet-iron extending diametrically across from one side of the armature to the other, said plates having diametrieally-projeeting spurs, and being so fixed as to present said spurs in different angular positions and dis tinct longitudinal ranks, as shown, and being separated from one another by non-magnetic material.

4. An armature-core for a dynamo-electric machine, formed of a number of plates of thin sheet-iron, which extend diametrically across from one side of the armature to the other, in combination with segmental blocks or fillingpieces, substantially as and for the purposes set forth.

5. An armature-core for a dynamo-electric machine, formed of a number of thin shectiron plates, which extend diametrically across the shaft, and which have inwardly-projecting lugs, which occupy a grooved non-magnetic sleeve, in combination with said sleeve and shaft, substantially as set forth.

6. An armature-core for a dynamo-electric machine, formed of parallel plates of thin sheet-iron, connected to the same shaft and extending diametrically across from one side of the armature to the other, said plates having each two diametrically-projecting spurs, and being so fixed as.to present said spurs in diil'erent angular positions in groups or series, as shown, and with the.spurs in longitudinal ranks, of which all the plates in each separate rank are connected near their ends and are magnetically separated from all the intervening plates, substantially as set forth.

7. An armature-core for a dynamo'electrie machine, formed of parallel plates of thin sheet-iron, connected to the same shaft and extending diametrically across from one side of the armature to the other, said plates having each two diametrically-projecting spurs, and being so fixed as to present said spurs in diiterent angular positions in groups or series, as shown, and with the spurs in longitudinal ranks, of which all the plates in each separate rank are magnetically connected near their ends by interposed polar connections 18 and are magnetically separated from all the intervening plates, substantially as set forth.

8. An armature-core for a dynamo-electric machine, formed of parallel plates of thin sheet-iron; connected to the same shaft and extending diametrically across from one side of the armature to the other, said plates having each two diametrically-projecting spurs having lateral prolongations 17, and being so fixed as to present said spurs in different angular positions in groups or series, as shown, and with the spurs in longitudinal ranks, of which all the plates in each rank are magxo netically connected near their ends by interposed polar connections 18,havinglateral prolongations 17, which correspond with the said spur prolongations, and are magnetically separated from all the intervening plates, substantially as set forth.

OSCAR AXE'L ENI'IOLM.

Witnesses:

HERBERT KNIGHT, Gno. H. KNIGHT.

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