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:
May. 09, 1978
Filed:
Apr. 08, 1976
Buddy J Austin, Lafayette, IN (US);
Roper Corporation, Kankakee, IL (US);
Abstract
A control circuit for a microwave oven including a main timer for setting the period of operation and having a high power mode in which power is continuously supplied to the microwave generator for the entire timed period, and a defrost or low power mode wherein power is supplied at a reduced duty cycle for the selected time period. The circuit, in addition to the main timer operable in both modes, includes a defrost timer operable only in the defrost mode for periodically interrupting the power circuit for the microwave generator thereby to provide reduced duty cycle operation. The circuit further includes means for automatically resetting the defrost timer after operation thereof to assure that the microwave generator will be instantly energized upon subsequent operation, independently of the subsequently selected mode.