US342553A - Induction-coil - Google Patents

Description

(No Mode1.) 3 sheets-sheet 1. G. WESTNGHUSE, JI.

INDUGTION COIL. v

No. 342,553. Patented May 25, 1886.

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INDUCTION C011..i

No. 342,553. Patented May 25, 1886.

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G. WESTINGHOUSE, Jr.

v INDUCTION COIL. No. 342,553. Patented May 25, 1886.

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GEORGE VES'IINGHOUSE, JR., OF PITTSBURG, PENNSYLVANIA.

INDUCTION-Colt.-

SPECIFICATION forming part of Letters Patent No. 342,553, dated May 25,1886.

Application filed February 16, 1836. Serial No. 192,071. (No model.)

.To all whom it may concern:

Be it known that I, GEORGE WEsTING- HOUSE, J r., a citizen of the United States, residing in Pittsburg, in the county of Alle 5 gheny and State of Pennsylvania, have invented certain new and useful Improvements in Induction-Coils, of which the following isa specification.

My invention relates to the class of electri- [0 cal apparatus commonly employed for transforming electric energy of another form.

It has long been customary to employ induction-coils or converters for transforming electric currents of considerable quantity and low potential into currents of high potential and small quantity, but the conversion of high potential currents into currents of low potential without modifying the quantity is equally practicable, and also the conversion oi' currents of a given quantity into currents of greater quantity. Whatever be the particular form of conversion required, it is desirable that the entire current in the primary circuit be utilized in developing magnetism in snrrounding iron, and that this magnetism shall in turn be expended upon the secondary coils and develop the greatest possible amount of current therein. To bring aslarge an amount of iron into as close proximity as'possible to the primary and secondary coils, and yet construct the converter in such manner that there shall be but little loss of energy through heating the iron, and to render it capable of rapid charge and discharge is the object of the pres- 35 ent invention.

The invention consists in constrnctinga ecnverter in substantially the following manner:

A number of thin soft-iron plates, each consisting of two parallel end pieces connected to- 40 gether by a central web, are bolted together side by side. The plates are separated from each other by intervening washers or plates of non-magnetic material-such as vulcanized fiber-and an airspace may be left, if desirable, between each two plates. The bolts are surrounded by tubes of vulcanized iiber or other non-magnetic material, or they may themselves be of non-magnetic material, such as brass. Preferably, however, vulcanized 5o fiber is employed for separating the plates from each other and from the bolts, or some equivalent material which will serve to separate them electrically as well as magnetically. Vhere large continuous masses of iron are rapidly magnetized and demaguetized they 53 become heated, and there is a consequent loss of electrical energy. The thinner the plates are madethe less will be the energy expended in heating them. For this reason the plates of .which the core is composed are themselves 6c made quite thin, and this construction also permits the coil tov charge and discharge quickly. In the open space formed by the end pieces and the webs ol' the series of plates the primary and secondary conductors are wound, preferably, in alternate layers. After the spaces have been filled by the convolutions of these conductors outside plates of soft-iron are placed between the arms of the outside arms or end pieces, and these serve to inclos Or completely surround the conductors byr laminte of iron. The outside plates are respectively in magnetic contact with correspending foundation-plates,butinsulated from all the others. Each foundation-plate, there- 7 5 fore, in conjunction with the outside plate, forms a complete ring about the primary and secondary conductors. The plates may be arranged in a straight series, being placed side by side and in parallel planes, or they may be 8o formed in a cylindrical series radiating from a common center. In the latter case each plate would have arms extending from one side only.

In the accompanying drawings, Figure l is a cross-section ofan induction-coil or converter embodying the features of the invention, and Fig. 2 is an elevation of the same, partly in section. Fig. 3 is a longitudinal section, and Fig. 4 is a cross-section, of a modified form. go I am aware that the primary and secondary conductors of a converter have been surrounded by masses of soft-iron composed of magnetically separated `soft -iron disks, through which vthe conductors are led. Referring to Fig. 1, A A2, 85e., represent thin plates of soft iron, which may be conveniently formed by stamping. Each plate consists of a central web, a, having Tshapcd ends. The arms a a and a2 a2 of the latter project in oproo posite directions from the web, and form therewith two rectangular spaces, designed to re flO ceive the wire of the primary and secondary coils. vThe plates are bound together, side by side, by longitudinal bolts B B and B2 B2; but they are separated slightly from each other by washers d d', surrounding the bolts. rlhe bolts themselves are preferably surrounded by tubes b, of Vulcanizediiber, and the washers are preferably of the same material. Instead of having the washers surround the bolts merely, they may be extended to cover the entire surfaces of the plates AA'', &c. The primary and secondary conductors E and E2, respectively, are wound longitudinally upon the I aminated core thus formed, andthey ill the rect-angular spaces. They may with advantage be wound in alternate layers, though this may not always be a necessary construction. Against the ends of the series of plates are placed rounded blocks F and F2, of wood or other suitable material, for the purpose of affording curved ends, over which the conductors are wound.

-rlhe primary and secondary conductors may with advantage be ofequal size and more or less ofthe convolutions of one coil included in multiple arc with each other, as required, to ob` tain currents of the required character. The sizes may be varied,I however, as found expedient.

After the conductors have been wound in place, short plates G'G'Z, &c., of iron,are placed across the ends of the projecting'arms a a2, and these serveto magnetically connect corresponding arms with each other upon each side ot' the coils, forming completev rings of magnetic material about the coils. The wire is thus completely inclosed by a series of r-ings ot' magnetic material. The plates G G2,&c., are insulated ll'rom each other magnetically, and preferably also electrically, by washers or plates d d, ot' vulcanized liber or other suitable material.

In Figs. 3 andy 4 a modified form is shown. In this instance, the plates A A, Ste., are formed Iwitha curved arm-at each end of the web ,-as shown at a and a2. The plates ra- 'diate from a common center, and may-be conveniently supported upon a block or cylinder, H, which is preferably of wood or other nonmagnetic material. The plates are magneticall y, and preferably also electrically,separated from each other, in essentially the same manner as described with reference to Figs. l and 2, by means of plates d d. The primaryand secondary conductors E and E2 are wound about Vthe core formed by the webs a, lilling the space between the arms a a and a2 a, and

v then plates G G2, &c., are placed outside the -ively being-'magnetically connected with the lamin of the core.

2. An inductorium or converter consisting of a series of thin plates having outwardlyprojecting arms, plates connecting the ends of said arms, and conductors within the spaces between said arms.

3. The combination, substantial ly as hereinbefore'setl'orth` of a series of double-T-shapcd plates of soft iron arranged side by side and magnetically separated, primary and secondary coils-wound upon the same longitudinally, and plates'of soft iron connecting the outer ends of' the arms of the T-shaped plates, substantially as described.

4. The combination, substantially as hereinbefore set forth, of a series of plates of soft iron having twogpairs of oppositely -projecting arms, coils of `insulated wire wound in the spaces between the arms,and plates connecting the outer ends of the arms, substantially as described.

=In testimony whereof I have hereunto subscribed my name this 11th day ol" February,-

'GEO. VESTINGHOUSE, JR.

Witnesses:

H. WHITTLESEY, C. M. CLARKE.

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