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. 06, 1990
Filed:
Aug. 31, 1988
Applicant:
Inventors:
Robert A Black, Jr, Brooklyn Park, MN (US);
Arlon D Kompelien, Cross Lake, MN (US);
Assignee:
Honeywell Inc., Minneapolis, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
315291 ; 315D / ;
Abstract
A circuit for use with the dimming control of a fluorescent light in which a 'notch' is created and positioned to vary the power to the inductive ballast and the circuit including a pair of gate turn-off thyristors operable to supply a current path for stored energy in the inductive ballast only during the notch.