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. 01, 1981
Filed:
Oct. 24, 1979
Bharat N Vakil, Coral Springs, FL (US);
Zenith Radio Corporation, Glenview, IL (US);
Abstract
An X-radiation protection circuit in a television receiver which permits safe operation at higher voltages and beam currents with corresponding increased video presentation brightness without the production of hazardous X-radiation by means of a control loop in which current in the high voltage sweep transformer generates a feedback signal to a conventional shutdown circuit. Excessive transformer current evidencing high electron beam current automatically lowers the turn-on voltage of the shutdown circuit providing for CRT operation at maximum safe high voltage levels and electron beam currents in accordance with 'Isodose' safety curves for CRT operation.