Pyromagneto-Electric Generator

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Drawing sheet — no readable text.

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UNITED STATES PATENT OFFICE.

NIKOLATESLA, OF NEW YORK, N.Y., ASSIGNOR OF ONE-HALF TO CHARLES

F. PECK, OF ENGLEWOOD, NEWJERSEY.

PYRO MAGNETo-ELECTRIC GENERATOR.

SPECIFICATION forming part of Letters Patent No. 428,057, dated May 18, 1890.

Original application filed May 26, 1887, Berial No.239,481, Divided and this application filed May 25, 1889, Serial No. 312,089. (No model.)

To all viom it may concern: . . . the coil is exposed, and a current in the coil Beit known that I, NIKOLA TRSLA, a sub is the result... Then remove the flame or in 50 ject of the Emperor of Austria-Hungary, from any other way reduce, the temperature of the Smiljan, Lika, border country of Austria-Hun 5 gary, residing at New York,in the county and iron. The lowering of its temperature is ac companied by a return of its magnetic prop

State of New York, have invented certain new erties, and another change of magnetic con 55 and usefulmprovements in Electrical Genera ditions occurs, accompanied by a current in tors, of which the following is a specification. an opposite direction in the coil. The same This application is a division of an applica otion filed by me May 26, 1887,Serial No. 239,481. operation may be repeated indefinitely, the This invention is an improved form of effect would upon the coil being similar to that electrical generator based upon the following whichized bar to follow from moving the magnet and from the end well-known laws: First, that electricity or plate. . . . . of the iron bar electrical energy is developed in any conduct orThe device forming the subject of my pres s ing-body by subjecting such body to a vary eat inventien, is an improved means of ob ing magnetic influence, and, second, that the taining this result, magnetic properties of iron or other magnetic which theinventionthe features of novelty in resides being, first, theem substance may be partially or entirely de ployment of an artificial cooling device, and, stroyed or caused to disappear by raising it second, inclosing the source of heat and that 20 to a certain temperature, but restored and portion of the magnetic circuit exposed to the caused to reappearby again lowering its tem theat and artificially cooling the said heated perature to a certain degree. These laws may part. These improvements are applicable be applied in the production of electrical cur generally to the generators constructed on the rents in many ways, the principle of which is 25 in all cases the same-viz., to subject a con plan above described-that is to say, I may ductor to a varying magnetic influence, pro with use an artificial cooling device in conjunction ducing such variations by the application of of a variable or varied or uniform source 75 heat, or, more strictly speaking, by the appli heat, I prefer, however, to employ a uni cation or activn of a varying temperature 'form heat,

In the drawings have illustrated a device

3o upon the source of the magnetism. Thispin constructed ciple of operation may beillustrated by a sim Figure 1 isinaaccordance with my invention. central vertical longitudinal ple experiment: Place end to end, and pref section of the complete apparatus. Fig. 2 is erably in actual contact, a permanently-mag a cross-section of the magnetic armature-core netized steel bar and a strip or bar of soft of the generator.

35 iron. Around the end of the ironbar or R Let A represent a magnetgnetized core or pera . . wind a coil of insulated wire. Then app y to manent magnet the poles of which are bridged the iron between the coil and the steel bar a by an armature-core composed of a casing or flame or other source of heat, which will be shell B inclosing capable of raising that portion of the iron to tubes C. Around this a number of hollow iron 4o an orange-red, or a temperature of about 600 conductors core are wound the centigrade. When this condition is reached, the currentsEE, to form the coils in which are developed. In the circuits 9.

theiron somewhatsuddenly loses its magnetic of these coils are properties, if it be verythin, and the same D is a furnacetranslating or closed devices, as FF'.

fire-box, through effects produced as though the iron had been which the central portion of the core B ex 45 moved away from the magnet or the heated tends. Above the fire is a boiler K, contain. section had been removed. This change of condition, however, is accompanied by a shift ing water. The flueI, from the fire-box may ing of themagnetic lines, orinother words, by Gisa up extend through the boiler.

water-supplypipe, and His the steam a variation in the magnetic influence to which exhaust pipe, which communicates with ali

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the tubes C in the armature B, so that steam What 1. In anI claim is generator, the combina electrical escaping from the boiler will pass through tion, with a magnetized core or body and a said tubes.

In the steam-exhaust pipe H is a valve V, thereby, ofwithin conductor the field of force produced 3o an inclosed source of heat applied to which is connected the lever, by the move to a portion of said core, and an artificial ment of which the said valve is opened or cooling device for reducing the temperature closed. In such a case as this the heat of the of the heated portion...thereof, asset forth. fire may be utilized for other purposes after 2. The combination, with a magnetized core 35 as much plied to of it as may heating the be needed core B.

has been

There are ap urbody and a conductor

d thereof, of an inclosed cial advantages in the employment of a cool to a portion of said core, meanssource of heat applied ing device, in that the metal of the core B is a cooling gas or fluid in contact for bringing not so quickly oxidized. Moreover, the dif heated portion of the core, and meanswith for the

ference between the temperature of the ap trolling the admission of the same. plied heat and of the steam, air, or whatever 3. The combination, with a magnetized core gas or fluid be applied as the cooling medium, containing passages or channels, and coils may be increased or decreased at will, where by the rapidity of the magnetic changes or wound thereon, of means for applying heat to a portion of the core, and a connection with 45 fluctuations may be regulated. : .

In so far as my presentifivention, broadly, anels, boiler for admitting steam into the chan as set forth.

isapparatus concerned,is the specific construction of the largely immaterial. I do not, however, claim in this application, broadly,

NIKOLATRSLA.

the application of a variable heat to vary the Witnesses:

R. J. STONEY, Jr., 25 magnetic conditions of a field of force in E.P.. COFFIN. which an induced conductoris-contained.