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. 02, 1980
Filed:
May. 19, 1978
Charles E Barker, Holland, MI (US);
Robertshaw Controls Company, Richmond, VA (US);
Abstract
A microwave oven cooking control system is provided with a comestible probe for temperature sampling. The comestible probe is only intermittently energized so that self-heating is avoided. Energization of the probe is under the control of a timing mechanism, which concurrently produces a voltage signal that rapidly increments in steps corresponding to possible internal temperatures of the comestible. The voltage signal is compared against a reference voltage level, which in turn is governed by the internal temperature of the comestible as sensed by the probe. The comparison results are used to deactuate energization of the probe and to control the microwave energy transmitted to the comestible by the microwave oven magnetron. A threshold a.c. current detector is also connected to said magnetron control to deactuate operation of the magnetron when a low amplitude a.c. power signal is received.