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:
Jun. 08, 2004
Filed:
Sep. 17, 2002
Wolfram Sowa, Munich, DE;
Abstract
The present invention relates to a device for preheating the two coil electrodes (W , W ) of a fluorescent lamp (La) comprising an AC voltage source ( ), a resonance capacitor C , which is arranged serially between the two coil electrodes (W , W ), a first inductance (L ), which is coupled between the AC voltage source ( ) and one of the two coil electrodes (W , W ), and a second inductance (L ), which is connected to a point between the AC voltage source ( ) and the coil electrode (W ) coupled thereto, the second inductance (L ) being coupled to the first inductance (L ) in such a way that a current flow (I ) through the second inductance (L ) leads to a reduction of the magnetization of the first inductance (L ). It furthermore relates to a corresponding method.