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:
Sep. 25, 1990
Filed:
Feb. 15, 1989
Fernando A Joanino, Skokie, IL (US);
North American Philips Corporation, New York, NY (US);
Abstract
A universal two-lead igniter for high intensity discharge lamps includes a first parallel RC network connected in series circuit with a second network between the two terminals of the igniter. The second network may include a second parallel RC network coupled to the first RC network via a voltage-responsive bidirectional switching device, such as a Sidac. Alternatively, the second network may include a second capacitor and an inductor connected in series with the Sidac device, The igniter is adapted to be connected in parallel with the lamp and generates, by means of a resonant type of operation of the first and second networks, a high frequency, high voltage pulsatory open circuit voltage that provides more reliable ignition of a HID lamp.