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:
Jan. 18, 2005
Filed:
Aug. 18, 2003
Carlile R. Stevens, Horseshoe Bay, TX (US);
Carlile R. Stevens, Horseshoe Bay, TX (US);
Other;
Abstract
A gas discharge lighting system with emergency lighting capability includes a gas discharge lighting device, a source of alternating current input power, and an electronic ballasting circuit having a direct current requirement and coupled between the gas discharge lighting device and the source of input power. The electronic ballasting circuit includes an alternating current-to-direct current conversion device, a power regulator connected to the conversion device, a controllable output direct current-to-alternating current inverter operated with a substantially square wave output, an impedance network, a controlling device for controlling the operation of the inverter and delivering power to the gas discharge lighting device, and an external source of direct current input power coupled to an input of the power regulator through an unidirectional current flow device.