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:
Mar. 17, 1981
Filed:
Jan. 22, 1979
Applicant:
Inventor:
Meerten Luursema, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
315106 ; 315105 ; 315174 ; 315176 ; 315219 ; 315226 ; 315D / ;
Abstract
An arrangement for starting and operating a low-pressure mercury vapor discharge lamp provided with preheatable electrodes. The lamp is supplied from a battery via two direct-to-alternating current converters connected between the battery and the lamp. One converter is a voltage-controlled converter which exclusively effects the preheating of the electrodes, whereas the other converter supplies the lamp current only. This arrangement provides reliable ignition and operation of the lamp even in the case of a large variation in the battery voltage.