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. 19, 1985
Filed:
Apr. 25, 1979
Kenji Satoh, Yokohama, JP;
Hitachi Heating Appliances Co., Ltd., Chiba, JP;
Abstract
A high-frequency heating apparatus including a heating chamber accommodating an object to be heated and a high-frequency oscillator supplying its high-frequency output into the heating chamber to heat the object by the high-frequency energy. The high-frequency heating apparatus comprises an output change-over device for changing over the level of the high-frequency output of the high-frequency oscillator and a temperature sensing device for sensing the temperature of the object being heated. The output change-over device is actuated to reduce the power level of the high-frequency output of the high-frequency oscillator when the level of the output signal of the temperature sensing device attains a predetermined temperature setting, and thereafter, the high-frequency oscillator supplying the high-frequency output of reduced power level is turned on-off a plurality of times depending on the level of the output signal of the temperature sensing device relative to the temperature setting.