The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 06, 1976
Filed:
Apr. 22, 1974
Hans Ivar Elvander, BOTH OF, Helsingborg, SW;
Ingvar Anton Edenwall, BOTH OF, Helsingborg, SW;
Karl Goran Gorling, Lidingo, SW;
Douglas Sewerin Ekman, Helsingborg, SW;
Boliden Aktiebolag, Stockholm, SW;
Abstract
A bed of coke or other material having a resistivity within the range of between 10.sup..sup.-4 and 10 ohm m is heated in a reaction chamber by means of an induction coil surrounding said chamber. The heat is generated in the bed itself by passing through said coil an alternating current having a frequency of at most ten times the mains frequency. There is maintained between the least cross dimension (d) of the bed area and the penetration depth (.delta.) of the inductive field a ratio determined by the relationship ##EQU1## WHERE K IS A NUMERICAL VALUE BETWEEN 1.1 AND 1.5.