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:
Dec. 08, 1992
Filed:
Mar. 11, 1991
Sakio Hanatani, Nara, JP;
Fuminori Kaneko, Matsubara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A heat cooking apparatus arranged to cook a food article through heating by projecting microwave energy generated by a magnetron and heat rays produced by an electric heating unit onto the food article placed in a heating chamber, and including a light source for projecting visible light rays onto the food article, a photo-detector for detecting a light amount of the visible light rays reflected by the food article, a temperature sensor for detecting temperature within the heating chamber, and a control unit which monitors variation with time of detection signals from the photo-detector and the temperature sensor during heating of the food article by the electric heating unit and controls to complete the heating of the electric heating unit by judging that the heating is to be terminated when the detection signal of the photo-detector is reduced by a predetermined value from a maximum value, and the detection signal of the temperature sensor is increased by a predetermined value from an initial value.