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:
Oct. 06, 1992
Filed:
Feb. 13, 1991
Applicant:
Inventors:
Robertus A Keijser, Eindhoven, NL;
Monique M Eerdekens, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ;
U.S. Cl.
CPC ...
313634 ; 313 25 ; 313 17 ; 313620 ; 313643 ;
Abstract
The invention relates to a high-pressure sodium discharge lamp provided with a discharge vessel having a ceramic wall and enclosed with intervening space by an outer bulb. The discharge vessel is provided with two electrodes whose respective tips have a mutual distance D. The discharge vessel has a substantially circular cross-section with an interior diameter d.sub.i over the distance D. Under nominal operating conditions, according to the invention, the wall has a wall load of at least 60 W/cm.sup.2, the space between the outer bulb and the discharge vessel contains a gas filling, and D/d.sub.i being >6.