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. 02, 1982
Filed:
Mar. 24, 1980
Applicant:
Inventors:
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313174 ; 313185 ; 313198 ; 313225 ;
Abstract
The invention relates to a high-pressure sodium vapor discharge lamp which has a discharge vessel in which xenon and a xenon-absorbing substance are present. The xenon is absorbed partly in the absorbing substance. When the temperature is raised xenon is released. According to the invention, the xenon pressure P at room temperature has a value which satisfies 1 kPa.ltoreq.P.ltoreq.25 kPa. Herewith it is achieved that a lamp is obtained having good ignition properties and a high xenon pressure in the operating condition of the lamp, resulting in a large luminous flux.