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:
May. 05, 2009
Filed:
Aug. 25, 2005
Matthias Burkhardt, Hohenbrunn, DE;
Conrad Schimke, Berlin, DE;
Matthias Burkhardt, Hohenbrunn, DE;
Conrad Schimke, Berlin, DE;
Osram Gesellschaft Mit Beschraenkter Haftung, Munich, DE;
Abstract
The invention relates to a transformer for generating a starting voltage for a high-pressure discharge lamp having a ferrite core and at least one primary winding as well as at least one secondary winding, the at least one secondary winding being formed by a metal strip which is arranged on the ferrite core such that the high-voltage carrying end of the at least one secondary winding is arranged on the inside. In addition, the invention relates to a high-pressure discharge lamp, preferably a mercury-free metal halide high-pressure discharge lamp, having such a transformer which is arranged as a starting transformer in the lamp base of the lamp, and to a high-pressure discharge lamp having a transformer which is arranged in the lamp base and whose secondary winding has a DC resistance of less than or equal to 0.5 ohm.