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:
Mar. 03, 1987
Filed:
Jul. 08, 1985
Applicant:
Inventor:
Kenneth I Eke, Surrey, GB;
Assignee:
Microwave Ovens Limited, Surrey, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
219 / ; 219 / ; 99325 ; 426243 ;
Abstract
A microwave oven has a magnetron for supplying microwave power to a cavity of the oven, and an electrical resistance heating element over which air is blown by a fan to provide a forced flow of hot air through the cavity. The variation in hot air temperature is monitored, and the slope of the temperature/time variation is sensed after a predetermined time interval from the commencement of cooking with the oven in a cold condition. The sensed slope is then used to predict the time period it will take the hot air temperature to reach a predetermined threshold, and the microwave power and the hot air are discontinued after the predicted time period has elapsed.