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:
Sep. 20, 2011
Filed:
Aug. 31, 2007
Applicant:
Arno Döbbeler, Herzogenaurach, DE;
Inventor:
Arno Döbbeler, Herzogenaurach, DE;
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F27D 1/00 (2006.01); H05B 7/148 (2006.01); H05B 7/144 (2006.01); H05B 7/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
A reactance ballast device (V), in particular for an arc furnace, has an induction coil () and a free-standing load stepping switch (), with the load stepping switch () being designed to adjust the reactance of the induction coil () while on load. A transformer (T), in particular for an arc furnace (O), has an associated reactance ballast device (V) of the type mentioned initially. An arc furnace (O), in particular for steel smelting, is preceded by a transformer (T) such as this.