US444067A - Alfred g - Google Patents

Description

(No Model.) 2 sheets-sneet 1. A. G. HOLCMBE. DYNAMO ELECTRIC MACHINE.

Patented Jan. 6, 1891 if ,www

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(No Model.) 2 Sheets-Sheet 2.

A. G. HOLGOMBE.

DYNAMO ELECTRIC MACHINE.

No. 444,067. Patented Ja.11.6, 1891.

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UNITED 1STATES PATENT OFFICE.

ALFRED G. llOI.COMBE, OF LONG ISLAND CITY, ASSIGNOR OF ONE-HALF TO CHARLES L. BROIVNE, OF NEIV YORK, N. Y.

DYNAMO-ELECTRIC MACHlNE.

SPECtE-LCATION forming part of Letters Patent No. 44,067, dated January 6, 1891.

Application filed September 17,1890. Serial No, 365,271. (No model.)

To all whom, t may concern:

Be it known that I, ALFRED G. lloLconBE, a citizen of the United States, residing at Long Island City, in the county of Kings and State 5 of New York, have invented certain new and useful Improvements in Dynamo-Flectric Machinos, of which the following is a specilication.

Myinvention relates to dynamo-electric ma- 1o ehines of that class in which electric currents are generated by revolving electro-magnetic pole-pieces without coils in proximity to fixed armaturecoils, the exciting or induced coils also being stationary.

I 5 The objects of my invention are to secure a compact, eilicient, and simple machine which dispenses with moving wire, iron armaturecores, and in which lamination of the iron cores of the held-magnets is unnecessary, and

2o which cores are free from hysteresis.

The subject-matter of my improvements is hereinafter specified.

My improvements are more especially applicable to generators of alternate currents,

2 5 but may also readily be adapted to continuous-current machines in well-known ways.

In order to carry out my invention in the best way non" known to me, I mount the armature or induced coils in a circular series 3o in a fixed shell or ring-frame. The coils of the iieldnnagnets are also secured to the fixed armature-traine, while the pole-pieces revolve in bearings in definite relations to each other and to the armature-coils. Each series of polepieces lies on opposite sides of the armaturecoils, one series being of one polarity and the other of the opposite polarity, the field-coils being divided into corresponding polarity.

In the accompanying drawings, which represent so much of my improved machine as is necessary to illustrate the subject-matter claimed, Figure l is a vertical section on the line 1 l of Fig. 2, which is a corresponding section on the line 2 2 of Fig. l, with some of the parts removed. Fig. 3 is a diagram illustrating the armature-windingg Fig. 4, a view of the inner side of the skeleton armatureframe, the pole-pieces, and their connecting,r disk or spider on one side of the frame, and

Fig. 5, a section through the casing and arma- 5o ture-frame on the line 5 5 of Fig. et.

Standards A on a bed-plate B are shown as provided with bearings a for a shaft O, carrying a driving-pulley D. The shaft O is of iron, with its middle portion enlarged to constitute a core for the field-coils, and with shoulders c, against which iron disks or spiders F, lined on the shaft, bear, thus holding the spiders parallel to each other a proper distance apart. 6o

ledge-shaped pole-pieces E are secured by screws or other suitable means at uniform and suitable distances apart around the inner faces of each disk near itsperiphery and opposite each other, so as to leave a narrow space between their inner ends to be occupied by the armature-coils. These pole-pieces are thus in magnetic circuit with the core-shaft O, with which both they and their carryingdisks or spiders F revolve. l 7c A cylindrical shell or annular casing N, secured to the bed-plate by feet O on opposite sides of the standards A, is made of non-magnetic metal and of a width sufficient to overhang the spiders F, which close its ends, but revolve freely therein without touching. A ring G, also of non-magnetic metal, is secured to the inner side of the casing N, about midway of its length, and connected with a central diaphragm I, also of non-magnetic metal, So by plates or strips J, also of non-magnetic metal, arranged radially in the casing at suitable intervals, so as to connect the diaphragm and ring, four being shown in the drawings, thus rigidly connecting' these parts. The dia- 8 5 phragm is also encircled by an annular flange projecting on each side of the web of the diaphragm. This flange, the strips J, and the ring are all shown as of equal width.

The armature-coils K are interposed at suit- 9o able intervals between the ring G and the flange of the diaphragm I and in the same vertical plane. Each coil is wound on a core IJ of non-magnetic insulated material, such as vulcanized liber, hard rubber, or porcelain. These lined coils, like the movable pole-pieces, are arranged, at uniform intervals in a circular series and occupy a fixed position relatively thereto-that is to say,kthe number of coils is double that of the pole-pieces on one side of the machine; or, in other words, the coils are as numerous as all the pole-pieces, and as the latter are arranged in a double series, while the coils are all in the same plan e, each pair of pole-pieces is always actuated or influenced by two coils. The coils may be connected in multiple or in series, but preferably in series, as shown in Fig. 3. are held in position by annular or sectorshaped plates M, of non-magnetic material, secured by suitable fastenings to opposite sides of the diaphragm I, the ring Gr, and the cores L. These cores are wound vertically in planes parallel with that of their supports, or, in other words, parallel with the plane in which the pole-pieces rotate. The latter, it will be observed, are shown as being made solid and carrying` no wire and rotating close to the coils K, which have no iron in their cores.

The field-coils P are wound ona spool p, of non-magnetic metal, within which the enlarged central portion of' the core-shaft C freely revolves. The ends ofthis spoolv are parallel with the diaphragm l, to which it-is secured near its middle, so asy to divide the field-coils `wound thereon .centrally into. two portions corresponding with their respective pole-pieces, the organization being such that north polarity is induced in all the pole-pieces E on one side of the armature-coilsL and opiposite polarity in the others. Currents for the fieldand armature coilspass through their respective binding-posts Qand R.

The ring G, diaphragm I, and plates J areall electrically connected, these plates being sovarranged that when opposing. pole-pieces are opposite one plate corresponding polepieces are opposite the other plates, thus neutralizing by counter-currents the currents "generated by the pole-pieces passing the plates.

The advantages and mode of operation of my improved machine will readily be appreciated and understood by those skilled in the art without further description.

Having thus particularly describedthe construction and organization of my improved dynamo-electric machine, what I claim therein as new .and as of my own invention is l. The combination of the core-shaft, the spiders revolving therewith, the oppositely and inwardly projecting pole-pieces, the inclosing shell, the ring secured on the inside thereof, the central diaphragm, radial strips connecting the diaphragm and ring, (the ring,

strips, and diaphragm all being of non-magnetic material,) the single series of armaturecoils interposed between the ring and diaphragm and wound parallel therewitharound cores of insulated non-magnetic material, the spool in which the core-shaft revolves secured to the diaphragm, and theield-coils Wound They on' opposite ends of the spool and separated by the diaphragm, the combination being and operating substantially as hereinbefore set forth.

2. The combination of the core-shaft, the spiders and pole-pieces revolving therewith, theinclosing shell, the ring secured therein, the central diaphragm, radial strips connecting the diaphragm and ring, (the ring, strips, and diaphragm all being of non-magnetic material,) and the single series of armature-coils interposed between the ring and diaphragm and wound parallel therewith around cores of insulated non-magnetic material, the combination being and operating substantially as hereinbefore set forth.

3. The combination ofthe core-shaft, the ring, the central diaphragm, radial strips connecting the diaphragm` and ring, (the ring,

strips, and diaphragm all being of non-mag.- netic material,) armature-coils interposed in a single series between the ring and diaphragm and wound parallel therewith around lcores of insulated non-magnetic material, and field-` coils wound on a spool divided by and secured on the diaphragm, in which spool and diaphragm the core-shaft freely revolves, the combination :being and operati-ng substantially as hereinbefore set forth.

4. The combination of the .core-shaft, the ringgthe'central diaphragm, the radial strips connecting Ythediaphragm and ring, (the ring,` strips, and diaphragm all being of non-magnetic material,) and lfield-coils wound on a spool vdivided by and secured on the diaphragm, in Whichf spool and diaphragm the core-shaft freely revolves, the-combination being and operating substantially as hereinbefore set forth.

5. The combination of the ring, the central diaphragm, radial metallic strips connecting the/diaphragm. and ring, andv stationaryarmature-coils interposed between the ring and diaphragm, the combination being and operatingsubstantially as hereinbefore set forth.

6; The combination of the core-shaft, the diaphragm, .theV spool secured thereto in which the core-shaft revolves, and the'separate fieldcoils wound upon thespool on oppositesides of the diaphragm, the combination being and operating substantially as hereinbefore set forth.

7. Thecombinationfot the diaphragm, the spool secured thereto, the separate field-coils wound on opposite sides of the diaphragm, the core-shaft revolving freely in the spool, spiders on opposite ends of the core-shaft at both ends of the spool, and inwardly-projecting pole-pieces without coils, carried by the spiders, the combination being. and operatingsubstantially as hereinbefore set forth.`

8. The combination,'substantially as here- IOO inbefore set forth, of the ring, the diaphragm,

tion to the radial strips as always to aot uniformly upon chem to neutralize counter-ourrents therein.

9. In a dynamo-electric machine 0r eleetrie motor, the Combination of the armature-coils, the pole-pieces, and the radial met-allie strips arranged equidst-ant around the circle of armature-coils and pole-pieces and connecting the inner and outer rings of the 'frame Within which J@he armature-coils are mounted. Io

In testimony whereof I have hereunto subscribed my naine.

ALFRED G. HOLCOMBE. lVitnesses:

EDWARD C. DAVIDSON, LLOYD B. WIGHT.

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