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:
May. 18, 1993
Filed:
Dec. 30, 1991
Applicant:
Inventor:
William H Jones, Villa Park, IL (US);
Assignee:
Appliance Control Technology, Inc., Addison, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ; H05B / ;
U.S. Cl.
CPC ...
315224 ; 3152 / ; 315226 ; 315291 ; 315D / ;
Abstract
An electronic ballast for use with fluorescent lamps including a dimming means consisting of a permanent magnet supported over and in proximity to a dual toroid coil assembly utilized as part of an included inverter circuit included in the ballast. The permanent magnet is movable to control the amount of saturation of the transformers thus determining the width of pulses generated by the transistors included in the inverter circuit and thereby controlling the intensity of light emitted from the fluorescent lamps.