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. 05, 1985
Filed:
Jan. 03, 1983
Applicant:
Inventors:
Edward H Stupp, Spring Valley, NY (US);
Mark W Fellows, Monroe, CT (US);
Assignee:
North American Philips Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
315307 ; 315210 ; 315219 ; 315224 ; 315239 ;
Abstract
A control circuit for starting and operating a gas discharge lamp comprising a variable frequency waveform generator coupled to the discharge lamp via a non-resonant coupling network that includes a reactance type ballast impedance. The lamp current is monitored to automatically vary the frequency of the variable frequency generator as a function of the lamp current so as to vary the reactance of the ballast impedance in a sense to regulate or limit the lamp current.