US309735A - Armature for dynamo-electric machines - Google Patents

Description

. No Modem 2 Sheets-Sheet 1.

B. P. ORTON.

ARMATURE POR DYNAMO ELECTRIC MACHINES.

No. 309,735. Patented Deo. 23, 1884.

(No Model.) 2 Sheets-Sheet 2.

B. F. ORTON.

AEMATUEE ECE DYNAMC ELECTRIC MACHINES.

No. 309,735. Patented Deo. 23, 1884.

Nv PETERS. Pnmmmmmunv-r. wmmmn. d, c.

UNITED STATES PATENT OFFICE..

BENJAMIN F. ORTON, OF EAST SAGINAV, MICHIGAN.

ARMATURE FOR DYNAMO-ELECTRlC MACHINES.

SPECIFICATIQN forming part of Letters Patent No, 309,735, dated December 23, 1884-.

Application tiled December 1l, 1883. (No model.)

T0 LZZ whom/it may concern:

Be it known that I, BENJAMIN F. O'RroN, a citizen of the United States, and a resident of East Saginaw, in the county oi" Saginaw and State of Michigan, have invented certain new and useful Improvements in Armatures for Dynamo-Electric Machines, of which the following is a specification.

My invention relates to the construction of the core or carrier upon which the armature coils or bobbins of a dynamo-electric machine or motor are wound.

The object of my invention is primarily to increase the efliciency of the machine, but also to so construct the armature core or carrier that it shall constitute what is known as a sectional armature, or one in which the armature ring or cylinder may be built up .from sections upon or to which coils or bobbins have been previously wound or applied.

My invention is intended to provide a simple construction for this purpose, and at the same time to prevent the circulation of socalled Foucault orinduced currents in the body of the armature ring or core.

My invention consists in certain details of construction and combinations ot' parts, that will be hereinafter described, and then speei iied in the claims.

In the accompanying drawings, Figure lis a longitudinal section of one of the armaturesegments on the line l l of Fig. 2. Fig. 2 is a transverse section on the line 2 2 of Fig. 1. Fig. 3 is a longitudinal section showing the manner ot' applying aretaining band or strip to the core. Fig. 4. is a side view of a portion of a ring-armature constructed according to my invention. Fig. 5 is a transverse section through one of the arms of the frame or spider upon which the armature segments are supported and to which they are secured. Fig. 6 is a plan view of an armature-coil and a portion of the core. Fig. 7 is a section on the line 3 3 of Fig. 3. Fig. 8 is a side view of the devices employed for fastening the abutting sections together when the construction of Fig. 8 is employed. Fig. 9 is a longitudinal section of an armature, showing a modified disposition of the thin curved strips or plates constitutingthe body of the armature. Figs.

l0 and ll illustrate a form of armaturesection to which the trame or spider or" Figs. 4 and 5 is adapted.

Referring to Figs. et and 5, A indicates the hub of the frame or spider, from which hub project the Vfo ur arms orspekes B,each of which latter is widened at its top and in a direction parallel tothe axis of the machine, to form an extended bearing or seat, C, upon which the abutting ends ot' the armature segments or sections rest. The bearing C is slightly re eessed by preference, as shown in Fig. 5, to prevent lateral movement of the armature-sections. The abutting ends of the sections are clamped or held in place by a yoke or a crosspiece, D, extending across from one side ot' the armature to the other, and bolted or otherwise secured to the seat or bearing C, as indicated in Fig. 5. The main portion of each armaturesection is made up of aseriesot thin sheets of iron, c, which are curved or bent to the general form of the armature, and are piled upon one another', as shown in Figs. l and 2, and are clamped together and secured to a curved base piece or support, d, also of iron, but somewhat thicker and heavier than the plates c, so as to form a stiff support or tray or holder for the latter. The trays or holders d abut and rest squarely against one another, and are supported in the seats C, as indicated in Fig. 4t, in which position they are held by the cap-plates D. Each plate c is made somewhat shorter than d, so as to leave a space between one end of each plate c and the adjoining end ol" (l, thus preventing in large measure the circulation ol' induced eurrents in the body ofthe core or carrier. The plates c are separated from one another by plates or washers of iron, so as to leave passages between the plates c for the circulation of air. rIhin pieces of non-1nagnetic material may be interposed between the separatingwashers and the plates c, so as to electrically insulate the plates c from one another, and prevent the llow of the induced currents transversely in the core. The plates c and d are held together by rivets f or other device.

F F F, 81o., indicate pieces of thin sheet metal or other suitable material bent up into the shape shown, so as to form guides or hold- IOO ers tor the armature-wires, and clamped to l sulated by interposing thin sheets ol' paper or the inner and outer sides of the armature-core by the rivets j or other devices.

At g g g, de, are indicated lugs or projections extending from the inner side of the plate or holder d, and serving to determine the position ot the inner guide-pieces F, as well as to prevent the latter and the coils upon them from slipping upon the core. Lateral projections h aid in keeping the coils in place. rlhe projections g and It at the extremities ot' the plate d abut against the edges of the seats or bearings C, and prevent the armature-core from slipping in said bearings.

In addition to the inner plates or supports, d, I sometimes use a retaining-band made up of a number ol' curved plates, m, of any suitable mateiial, preferablyiron, which lie upon or form the exterior portion of the core, as shown in Figs. 3, 7, and S. The uptnrned ends of the latter are bolted together, and the ends of said plates by preference rest upon the npturned ends of the plates d. ln this case the clamp D is cut away at its center, as shown in Fig. 7, to leave space for the plates m, forming the exterior clamping-band- The ends of the plates d are planed or milled, so that they will abut squarely, and thus make good magnetic connection from one section of the armature tothe other. lVhen the exterior band, m, is of iron, the arrangement of it and the plates d (shown in Fig. 3) conduces to good magnetic continuity of the armaturecore.

l have in the drawings shown the armature as made in four sections or segments; but it will be of course understood that each section may be much shorter and their number con respondingly increased, there being in such case a correspondingly large number el." seats or bearings C. l have also shown a multiplicity of armature-coils upon each arn'lature segment or section; but, it desired, there may be a separate armatnre'segment for each coil. The seat or bearing C, as it extends transverselythe entire width ot' the armature-core, forms a stable and iirin support for the armature-segments, and t-he structure,when the various segments are put in place and clamped by the yokes or cap-pieces D, forms a coinplete armatnre of 0reat stiffness and rigidity. At the same time any segment, with its coil or coils, may be readily removed i'or any purpose.

ln Fig. 9 the thin curved strips ot' iron, c, are much shorter than the supporting plate or tray d; but their ends are made to overlap, so that a free air-space is left, as indicated, betweenthe plates. Separating plates or washers are interposed at suitable points. Comparatively thin washers or plates may be interposed between the overlapping ends of the plates c, while at or near the ends of the plates d thicker pieces are interposed, to keep the plates c the requisite distance apart. The

platesc are also by preference electrically in 1 other suitable material at the proper places, as is well understood in the art.

The supporting i'rame or spider and the elampingplates D are well adapted to holding and securing armature-core sections ofthe construction indicated in Figs. 10 and 1l, in which the thin sheet-metal strips are set on edge and rest directly at their ends in the seats or bearings C. rllhe plates c of Fig. l0 are secured together by transverse bolts, as shown, and are separated from one anotherby -thin washers, asindieatml, ot' any desircdmaterial.

lil H H indicate stiffening-plates, made somewhat thicker than the plates c.

lV hat l claim as my invention is 1. ln a sectional armature, segments or sections, each consisting oit' a curved base or supporting plate constituting a segment of a circle, carrying a number of superimposed sheets ot' iron with interposed separating plates or washers.

2. ln a sectional armature, a segment or section composed ot' a tray-like holder or sup` port, d, having upturned ends, and carrying a number oi' superimposed thin plates of iron.

A sectional armature composed of segmental base plates or supports oi iron having upturned ends that abut against one another, and each carrying a number of superimposed thin plates of iron secured together and to said base-platc.

4. In a dynamoelectric machine, the combination, with thc abutting ends ofthe armature-sections, of a seat or bearing, C, extending the width of the armature-section, and a transverse clamping-plate or cap-piece, D.

5. ln a dynamoeleetric machine, a frame or spider for holding the segments or sections ol' a sectional armature, having the seats or bearings C ci' a width corresponding to the width oi' the armature-core, in combination with armaturesegments having their abutting ends resting on said seats, and means i'or holding said abutting ends in position.

(3. In a dynamo-electric machine or motor, a retaining band or ring i'or the armature, made ot' segments m, having upturned ends bolted or otherwise properly secured together.

7. rlhe combination of the abutting supporting-plates d,the exterior retaining-plates, m, bolted together, and a series of superimposed thin sheets ot' iron held between each pair et' plates d oa, and separated i'rom one another by i'ree air-spaces.

S. rlhe combination of the supporting-plates d, having upturned ends resting in contact, and held in place upon a spider or by any suitable construction, the exterior retainingplates, m, resting at their ends upon the abutting ends oi the plates d, and secured by any suitable means, and the series of thin iron plates c, superimposed, but separated by free airspaces.

9. in anarmature i'or dynamo-electric ma lUJ IIO

chines or motors, the combination of the suleave transverse or lateral air-spaces through perimposed thin segmental strips of iron, c, the body oi'l the armature. rivets or bolts f, and separating-pieces of iron l2. In a dynamo-electric machine or motor, between said strips, as and for the purpose dcan armature built up from thin superimposed 5 scribed. iron plates bent to the form of the armature 2o l0. In a sectional armature, a enrved baseand separated from one another bylateral free plate for an armature-section, said base-plate air-spaces. having` upturned ends, as and for the purpose Signed at New York, in the county of New described. York and State of N ew York, this 7th day of 1o l1. In a dynan'io-eleetrie machine or motor, December, A. D. 1883. a. rin 0 or e linder armature built up from thin T T platetiron 5in superposed layers bent or curved BEA JAMIL F' ORlON to the form of the armature and havin(y inter- YVitnesses:

n u 7 D posed separating-pieces of magnetieniateriai Trios. TOOMEY, 15 i'orseparating` the superposed layers, so as to Gno. C. COFFIN.

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