US301872A - Armature for dynamo-electric machines - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

E. A. EDWARDS;

ARMATURE POR-DYNAMO ELECTRIC MACHINES.

N0. 301,872. Patented July 15, 1884.

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(No Model.)

. E. A. EDWARDS.

ARMATURE FOR DYNAMO ELECTRIC MACHINES. No. 301,872. Patented July 16,1884.

UNITED STATES PATENT Erica,

EDcAR A. EDwARDs, or oINcINNATI, AssIeNoR To osoAR M. GOTTSGHALL, TRUsTEE, oE DAYTON, OHIO.

ARMATURE FOR DYNAMO-ELECTRIC MACHINES.

SPECIFICATION forming part of Letters Patent No. 301,872, dated July 15, I884.

' Application filed October 18, 1883.

(N0 model.)

To all whom it may concerto.-

Be it known that I, EDGAR A.EDwARDs, a citizen of the United States, and a resident of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvementsin Armatures for Dynamo-Electric Machines, of which the'following is a specification.

My invention relates to that class of armatures for dynamo or magneto electric machines in which the inductive wire is wound wholly upon the exterior surface of a supporting-core, and means are provided so that a current of air may be forced through the armature and between or around the coils to carry off any heat generated therein; and its objects are to furnish such a construction as to insure a thorough ventilation of the armature, causing the air currents to impinge on as great an extent as possible of the coils, and over the largest possible amount of the core-surface, and also to construct the inclosing end disks of the armature, so as to prevent to a great degree, if not totally, the circulation in the core' of induced or Foucault currents. The means of accomplishing these objects will be fully set forth in the description of the accompanying drawings, in which Figure 1 is an elevation of the end drum of the armature; Fig. 2, a section on line 00 m, Fig. 5; Fig. 3, adetail sectional view of one of the air-passages in end plate, 0; Fig. 4, an end elevation of the armature-core; Fig. 5, a section on line y y, Fig. 2; Fig. 6, an end view'of the armature with the drumremoved.

A represents the shaft of the armature; B, a core made of diamagnetic material, and preferably of wooden disks slipped upon the shaft A, and secured thereto in any desired manner. 1

0 represents the end plates, rigidly secured to the core B.

6 represents inwardl y-proj eetin g hubs,which may be cast on and with the end-plate, (l, for more firmly securing the core to the shaft A.

1) represents iron wire rings, which are formed by winding the wire in U-shaped brackets cl, which are insulated upon tie-rods E, which are connected to the armature-shaft, as substantially shown and described in Letters Patent No. 275,169, granted April 3, 1883.

Other methods of making the iron-wire rings may be employed in lieu of the form here shown; but the form here shown I deem the best.

F represents metallic disks or drum-heads, which are rigidly secured to the periphery of heads O by the flange or rim turned upon the outer edge of the disks F. These disks are shown of concave form. They may be made of cylindrical form and still accomplish the same result, though not so perfectly.-

G represents a seam or slit cut from the periphery of disks F inwardly to the shaft-hole, as shown in Fig. 1.

it represents rivets for uniting the edges formed by the slit G to a piece of rubber, leather, or other insulating material, so as to form a seam and prevent a circulation of electric currents circumferentially over the surfaces of disks F when they are made of metal.

II represents an opening formed in disks F around the shaft A, for admitting air into the interior of the armature.

I represents the transverse coils of the armature.

L represents spaces between these coils, through which the air passes from the entrance II, from which it passes up through spaces Lto air-passages M, which are formed through the heads 0, and connecting with the spaces L between the armature-coils at the ends of the armature with a space, N, which is formed between the series of rings D, out through which the air escapes, as indicated by the arrows in Fig. 2, for ventilating or keepingthe armaturecoils cool.

By inclosing the ends of the armature with the disk F and admitting the air near the axis, and providing a space between the disk F and the coils I with air-passages M, N, and c, the centrifugal force developed by revolving the armature propels the air through with great rapidity, and forms an automatieal air-compression device, operating somewhat after the manner of a blower. This mode of constructing the armature and arranging the air-passages so as to keep a current of air passing at all times through and between the transverse and radial coils is very important, and effects a thorough ventilation of the armature.

0, Fig. 4, represents the preferred form of constructing the hubs, the disks 0 being made of a separate piece of metal from that of disks 0, and secured thereto by screws or bolts.

The arlnz'iture could be made of skeleton form without the diannignetie core 13 and still embrace the features of invention specified in the lirst three clauses of claim herein.

I elaim-- 1. An armature composed of a series of rings, ll, lutving air-spaces c, in eoinbiin'ition with air-spaces N and M between the rings and coils and core, for conducting currents of air endwise into the interior of the armature and l discharging it radially outward, substantially as herein set :lorth.

2. A dynamo or magneto electric machine provided with disks 1*, inelosing the ends of the armature, having air-orifices H at or near the axis, and with air-passages N and M between the rings or coils and core for carrying the air through the arinatureeoils and discharging it radially outward through spaces a, substantially as herein set forth.

3. An armature eom niised ol' the diallingnetie core 13, having air-spaces N, a rramged lo a giti'ulinally along periphery of the core Ill and bet\\"een. the rings or cells and core, in eonibt nation with the rings Ill, having air-spaces between them, and the disks 1*, inehising the ends ol coils l, with the air-orifices l i near the axis A, substantially as herein set forth.

41:. In an armature .I'or a dynamo or magneto electric machine, the metallic disks .l inelo1-sing the ends ol'the coils ol. the armature, provided with the radial seam ll, l'or n'menting the circulation of the iinlueed currents, sub stantially as herein set :l'orth.

In testimony whereof Ili have hereunhi set my hand.

JOHN S. BALDWIN, ANNA Emmnns.

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