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. 15, 1989
Filed:
Mar. 17, 1987
Kenneth A Roll, Kirtland, OH (US);
John M Davenport, Lyndhurst, OH (US);
Pieter J von Herrmann, Shaker Heights, OH (US);
General Electric Company, Schenectady, NY (US);
Abstract
A power supply system for discharge lamps employs a current interruption circuit to control current flow through a discharge lamp. A power switch is connected in series with the lamp and controls the current level in the lamp by controlling lamp current on-time. The current on-time is maintained for a relatively very short time period allowing control of lamp current by controlling the integral of the lamp current or controlling the charge delivered to the lamp during each pulse rather than controlling peak current value. Since the voltage impressed across the lamp generally exceeds the conventional value observed when using a passive current limiting means, for example a series reactor, non radiative losses associated with operating the lamp are reduced.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile