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:
Nov. 21, 2006
Filed:
Mar. 19, 2004
Kazuhisa Nishida, Tokyo, JP;
Kazuhisa Nishida, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A high-pressure discharge lamp is produced using tungsten wire that is wound as a double coiled winding around an electrode metal rod, leaving a tip end thereof, and the double coiled winding is machined into a melted tip end by a YAG laser beam, with the remaining double coiled winding used as a coil. The tip end of the metal rod is machined into a nipple on the distal end of the melted tip. The melted tip has a diameter Dand a length Lthe nipple has a proximal end having a diameter Dand a length Land the coil and the melted tip end (including the nipple) have a volume Vand the melted tip end (including the nipple) has a volume V, when the electrode assembly is machined to satisfy at least one of the conditions 0.15≦D/D0.3, 0.2≦L/L0.4, and 0.2≦V/V0.4.