US682088A - Electric furnace. - Google Patents
Electric furnace. Download PDFInfo
- Publication number
- US682088A US682088A US5097601A US1901050976A US682088A US 682088 A US682088 A US 682088A US 5097601 A US5097601 A US 5097601A US 1901050976 A US1901050976 A US 1901050976A US 682088 A US682088 A US 682088A
- Authority
- US
- United States
- Prior art keywords
- furnace
- chamber
- coil
- electric furnace
- furnaces
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/16—Furnaces having endless cores
- H05B6/20—Furnaces having endless cores having melting channel only
Definitions
- Forsmelting or heating ores, metals, and the like furnaces have already been employed in which an electric current sufficient for the smelting of the ore or of the metals is induced in the charge by means of alternating currents produced in a coil surroundingr the furnace, which incloses a core of iron or of other magnetic material.
- the object ofI my invention is to arrange the induction-coils in such furnaces in such a manner that they become cheaper and more eifective.
- a is the refractory walls of the furnace, and C an annular groove or chamber for the reception of the charge to be smelted or heated.
- c is a central channel surrounding the iron core cl.
- the conductor connected to the generator for the electric current is coiled around the furnace; but according to my invention the conductor is coiled directly on the core d, and thus inside the smelting or heating chamber.
- the larger diameter the furnace possesses the larger is the area between the induction-coil and the chamber' C (at the same thickness of the wall) when the coil is placed outside the furnace, and the number of the lines of force which escape between the coil and the chamber() also becomes larger, in consequence whereof the self-induction is increased.
- the eect thus is diminished as the diameter of the furnace increases.
- the space between the induction-coil and the chamber C may thus be smaller than when the coil is placed outside said furnacechamber C, in consequence whereof the effect becomes considerably greater than in the furnaces as heretofore constructed, and in addition my improved furnaces may also be made in considerably larger sizes than has been possible heretofore.
- I-Iaving now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is-- An electrical furnace comprising an annular furnace-chamber, a core dof magnetic material arranged centrally thereof and an induction-coil arranged around said core and within the annular furnace-chamber and connected to an alternating-current generator for the purpose of by said coil to induce currents in the charge of the annular chamber, suicient for the smelting of charge therein.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Furnace Details (AREA)
Description
No. 682,088. Patentnd Sent. 3. I90I.
F. A. KJELLIN. ELECTRIC FURIIACE.
(Avnlienm :und In. la, 1001.) (lo Model.)
YEWO @WW/ff 1m; mum Peleas ro, mo'raumo., wmmcmu. u. c,
YUNITED STATES PATENT OFFICE.-
FREDRIK ADOLF IIJELLIN, OF GYSINGE, SWEDEN.
ELECTRIC FU RNACE.
SPECIFICATION forming part of Letters Patent N o. 682,088, dated September 3, 1901.
Application filed March 13, 1901. Serial No. 50,976. (No model.)
lTo @ZZ whom it may concern:
Be it known that I, FREDRIK ADoLn KJEL- LIN, engineer, of Gysinge, in the county of Gestrikland, Kingdom of Sweden, have invented certain Improvements in ElectricFurhaces; and I do hereby declare the nature of my invention and in what manner the same is to be performed to be particularly described and ascertained in and by the following stateinent'.
Forsmelting or heating ores, metals, and the like furnaces have already been employed in which an electric current sufficient for the smelting of the ore or of the metals is induced in the charge by means of alternating currents produced in a coil surroundingr the furnace, which incloses a core of iron or of other magnetic material.
The object ofI my invention is to arrange the induction-coils in such furnaces in such a manner that they become cheaper and more eifective.
In order that my invention may be readily understood and carried into eifect, I will describe the same fully with reference to the accompanying drawings, in which- Figure I is a vertical section of a furnace embodying my invention, and Fig. 2 a section on line C/ C' thereof. y
Referring to the drawings, a is the refractory walls of the furnace, and C an annular groove or chamber for the reception of the charge to be smelted or heated.
c is a central channel surrounding the iron core cl. In furnaces of this kind as heretofore constructed the conductor connected to the generator for the electric current is coiled around the furnace; but according to my invention the conductor is coiled directly on the core d, and thus inside the smelting or heating chamber. By arranging the cond uctor in such a manner the advantage is attained-that the length, and thus the cost as well as the loss of. energy at the passage of the current, is considerably reduced. The surface of the wall between the induction-coil and the chamber G also becomes considerably smaller than in the case when the` conductor is placed outside said chamber C, in consequence whereof also the quantity of heat transmitted from the furnace to said conductor becomes smaller. The larger diameter the furnace possesses the larger is the area between the induction-coil and the chamber' C (at the same thickness of the wall) when the coil is placed outside the furnace, and the number of the lines of force which escape between the coil and the chamber() also becomes larger, in consequence whereof the self-induction is increased. By such an arrangement the eect thus is diminished as the diameter of the furnace increases.
In furnaces arranged according'to my irivention the space between the induction-coil and the chamber C may thus be smaller than when the coil is placed outside said furnacechamber C, in consequence whereof the effect becomes considerably greater than in the furnaces as heretofore constructed, and in addition my improved furnaces may also be made in considerably larger sizes than has been possible heretofore.
I-Iaving now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is-- An electrical furnace comprising an annular furnace-chamber, a core dof magnetic material arranged centrally thereof and an induction-coil arranged around said core and within the annular furnace-chamber and connected to an alternating-current generator for the purpose of by said coil to induce currents in the charge of the annular chamber, suicient for the smelting of charge therein.
In witness whereof I have hereunto set my hand in presence of two witnesses.
FREDRIK ADoLF KJELLIN.
Witnesses:
JOHN EDBERG, BIRGER LINDT.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US5097601A US682088A (en) | 1901-03-13 | 1901-03-13 | Electric furnace. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US5097601A US682088A (en) | 1901-03-13 | 1901-03-13 | Electric furnace. |
Publications (1)
Publication Number | Publication Date |
---|---|
US682088A true US682088A (en) | 1901-09-03 |
Family
ID=2750631
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US5097601A Expired - Lifetime US682088A (en) | 1901-03-13 | 1901-03-13 | Electric furnace. |
Country Status (1)
Country | Link |
---|---|
US (1) | US682088A (en) |
-
1901
- 1901-03-13 US US5097601A patent/US682088A/en not_active Expired - Lifetime
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