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:
Feb. 04, 1986
Filed:
Jun. 09, 1983
Tomimitsu Noda, Nagoya, JP;
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Abstract
An infrared sensor made of LiTaO.sub.3 is provided on a ceiling of a heating chamber of a microwave oven, and a chopper is provided so as to intermittently block infrared radiation emitted from food in the heating chamber. The infrared sensor is brought to face the food and the chopper alternately and provides a corresponding AC output signal. The temperature of the chopper is detected from the output signal of a separately provided chopper temperature sensor consisting of a thermister. The detected chopper temperature output signal is corrected in a microcomputer to be substantially in accord with chopper temperature components in the output signal of the infrared sensor. The corrected chopper temperature data is applied to the infrared sensor output data for removing the chopper temperature components from the output signal of the infrared sensor to obtain a food temperature signal corresponding to the sole temperature of the food.