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. 16, 1990
Filed:
Feb. 27, 1989
Applicant:
Inventors:
Wolfgang Gottschling, Berlin, DE;
Klaus Guenther, Berlin, DE;
Hans-Georg Kloss, Hohen-Neuendorf, DE;
Rainer Radtke, Berlin, DE;
Felix Serick, Neuenhagen, DE;
Assignee:
Kombinat VEB Narva, Berlin, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
315246 ; 315326 ; 315358 ; 313638 ;
Abstract
A high-pressure sodium vapor lamp with elevated color temperature, high light yield and improved color rendering properties for general illumination purposes uses sodium or sodium amalgam with mole fractions x.sub.Na >0.9 as the arc media. The lamp power supply supplies pulses with a duty cycle .GAMMA.of 0.01>.GAMMA.>0.1 with alternating polarity, or with mole fractions x.sub.Na >0.95 even at uniform polarity, respectively.