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:
Mar. 01, 1988
Filed:
Mar. 10, 1986
Pieter Postma, Eindhoven, NL;
Andreas C Van Veghel, Eindhoven, NL;
U.S Philips Corporation, New York, NY (US);
Abstract
An electrodeless low-pressure discharge lamp comprising a glass lamp vessel (1) which is sealed in a gas-tight manner and is filled with a metal vapor and a rare gas, this lamp vessel being provided with a tubular protuberance (2) which accommodates a rod-shaped core (3) of magnetic material surrounded by a wire winding (4) connected to a high-frequency supply unit, by means of which during operation of the lamp an electrical discharge is maintained in the lamp vessel, the inner side of the lamp vessel being provided with a transparent conductive layer (10), which is electrically connected by means of a lead-through member (12) to a conductor, such as a metal rod (11) provided in the core (3), located outside the lamp vessel, this lead-through member (12) being located at the end of the tubular protuberance, and being electrically connected to the internal conductive layer, for example by means of a wire spring (15).