US1275206A - Electrical induction-furnace. - Google Patents

Description

0. c. B O CKMAN ELECTRICAL INDUCT URNACE. APPLICATION FILED .1918- 1,275,206.

Patented Aug. 13, @3918.

on nonennnnj nenn ny.

ELEUTlR-IGAL INTBUCTIOIWFU'RNACE,

specification of Letters Patent.

Patented Auggx Apnlleatien filed may 52, 1918. Serial No: 232,272.

To all 101 mm 5?? concern Be it known that i. OLUF CHRISTIAN Boommn, a eubgeet of the King of Norway,

residing nt iloeccldcn, in the Kingan-m oi" etheis skilled in the to which it nppen tains make and use the same, reference being heal. in the accompanying drawings, and to i em or .iigni'es of reference marked them-on, "winch form a, m. of this specification. I

In the kiwi n type of elel furnaces she ieguln nn of load oarzieci out by regulating tension of 'bhe electric current or by cutting in or out windings of the indueiion coils.

In several instances it is however do simble to regulate the load; of an induction furnace indepenrienf oi" the current passing through ihe coils of the $311K), and in this case generally 1 wary low'cos. p for the furnace may be. permitted.

This is Olilt-Zl-ilifid according to the present invention, two fm'ius of which are diagram,- innticaliy illusli'atei'i on l'hc drawing.

Figural is a sectional View fibrough a single-phase induction furnace according to the present system, and 2 is a plan of a thine phase induction furnace.

According to the lilVflllilOll the magnet core 1 is so const-rueied that the magnetic flux can either be comlucieil thi'mig'h the furnace or outside the suineihrough a mag?- nctic comiccion located in parallel to the magnetic COIIDEClHH} of the flu'nucc.

This, as illnstznle l on ihe chiming, nniy obtained by means of a pivoted pin-l; n l n Elmi F l in, mu nu anion.) i insinnu, on in. The. coil u may he surroumlcd by a prohe of tectingz shell 4 by means oi which (he coil .riei out otherwise than in i :e in

in incl uclien .When the smelting channels have difiiei'ent cross-sections, so that, the tenipeiraiii'ee in.

some channels become higher.- uiien in other-s.

The furnace should he brick lined and pro "aided with doors and tapping holes, and

itniey be mounted stationery OI e iiiling iui'nece in any known manner.

Ii, 13 elem: that the invention may he waited on the drawing, and i'she EDVBRLMMI it"; not limited to these mediiicailione, the innin fealaure of the invention being ihe arm-Eigement of n regula-ble magnet flux pain in she magnet system of the furnace.

I claim:

- 1. In an electric induction furnace ihe an rangement in pa 'ailel with fihe orninery path of inagnetiefiux of ii i'egula hie magnetic flux path with the object of permittingyg regulation of the furnace temperature independent of the current andmagnetie eois.

2. in. an eleeh'ic polypnez:,, inclueiio i 11- nuce the iii'i'nngeinent in each sepui-ul'e phase of the Iurnace of n i'eguiebie path of the magnetic flux in parallel to the oi' iliznir'y nnigneisic flux path with the ohjeotq f p mitting regulation of each se'painie phiee of the furnace, independent of the other phases and of the current and magnet coiis.

3. In an electric induction furnace an iniluotion coil, :1 core foi-nyhi-g u closed path for the magnetic flux created by the said coil, suid core coinpz-isingiin extension out- Side the furnace and means for regulating the magnetic flux in said extension.

4. In .un electric induction furnace. an induction coil a core forming a closed. path for the magnetic flux created by the said coil an extension on said core (nits-aide the furnace, said extension comprising n pivote; member by means of which the pafih formed by ihc 523.1116 may be closed or innermpterl. Wii'h the object of rcguliiting the magnetic flux in the main core.

in testimony that I claim the ioii egeing as my inveniion, I have signed my name in presence of two subsc 'ibing'witnwses.

new CHRISTIAN nooiinnn.

' Witnesses;

C. VOBMAN, THs. Hnnz.

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