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:
Aug. 18, 1981
Filed:
Dec. 18, 1979
Applicant:
Inventors:
Carlo S Bessone, Woburn, MA (US);
William J Roche, Merrimac, MA (US);
Assignee:
GTE Products Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
315240 ; 315 53 ; 315244 ; 315245 ; 315291 ; 315D / ;
Abstract
A dimming circuit for operating a fluorescent lamp in an incandescent-to-fluorescent adapter at two selectable current levels. The circuit includes a choke which is series connected between the center contact of a three-contact incandescent base and one of the lamp filament coils, and a capacitor connected between the ring contact and center contact of the base. A bleeder resistor of the PTC type is connected across the capacitor. For use with an incandescent lamp fixture having a four-position, three-way switch, the circuit further includes a current limiting discharge resistor connected in series with the capacitor.