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:
Feb. 16, 2010
Filed:
Sep. 18, 2007
William D Koenigsberg, Concord, MA (US);
Adam Scotch, Amesbury, MA (US);
Walter P Lapatovich, Boxford, MA (US);
Victor Perez, Manchester, NH (US);
William D Koenigsberg, Concord, MA (US);
Adam Scotch, Amesbury, MA (US);
Walter P Lapatovich, Boxford, MA (US);
Victor Perez, Manchester, NH (US);
OSRAM SYLVANIA Inc., Danvers, MA (US);
Abstract
The restrike time for re-light up of an arc discharge lamp may be decreased by including at least one refractory bimetallic start up electrode that provides a shorter arc path intermediate the main arc path in a cool state, but when heated withdraws to have a relatively longer arc path. The longer arc path in the hot state results in a relatively higher path impedance that can be used by itself or in combination with a supplemental impedance device to extinguish the starting arc in favor of the main arc. The withdrawn bimetallic starting electrode then does not interfere with the main arc function.