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:
Jul. 08, 2008
Filed:
Sep. 26, 2007
Patrick Mcelroy, Costa Mesa, CA (US);
Patrick McElroy, Costa Mesa, CA (US);
Balboa Instruments, Inc., Tustin, CA (US);
Abstract
A starting circuit for an electric discharge lamp providing an electric current to a lamp having a first and a second filament. The circuit measures a lamp current and a filament temperature and then compares these against a reference voltage. When the lamp current is below a set threshold value, a relay contact disposed between the first and second filament is closed to direct the electric current through the first and second filaments to initiate pre-heating of the lamp. Once the filament temperature exceeds a set threshold, the relay contact is opened and the electric current passes through heated gas inside the lamp.