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:
Aug. 22, 1978
Filed:
Aug. 02, 1976
Jozef Marie Van Herten, Venlo, NL;
Oce-van der Grinten N.V., Venlo, NL;
Abstract
A circuit for controlling the power transmitted from an a.c. voltage source by a switching element, particularly a triac, connected in series with a power element, e.g. with the heating element of an image fixing device in an electro(photo)graphic copier, is safeguarded against errant operation by the provision of a checking circuit which comprises means for blocking periodically the transmission of power by the switching element under its normal control and means effective in intervals of the interruption of said transmission by the blocking means for detecting whether power is then being transmitted to the power element and, if it then is, producing a corrective control signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile