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:
Nov. 15, 1977
Filed:
Jan. 23, 1976
Ronald Robert Brooks, Hamilton Square, NJ (US);
RCA Corporation, New York, NY (US);
Abstract
A lamp is included as a cathode load for a gate-turn-off silicon controlled rectifier (GTO). The conduction path of a transistor is connected between the gate electrode of the GTO and ground. The GTO and lamp are turned off by applying current in the forward direction through the base-emitter junction of the transistor, thereby turning on the transistor and placing the gate electrode of the GTO at ground. The forward current passes through a thermal circuit breaker which periodically opens in response to the heat produced by the current flow, causing the gate electrode of the GTO to become forward biased via the collector load resistance of the transistor and turn on.