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:
Nov. 03, 1981
Filed:
Mar. 12, 1980
Yukio Suzuki, Fuji, JP;
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Abstract
A microwave heating apparatus comprises a heating chamber, high frequency radio wave generator and heating resistors selectively connected through first and second switches to a power supply, and a control circuit connected through the first switch to the power supply. The heating apparatus also comprises heating resistor coupling units each including a displaceable member and a third switch. The displaceable member is displaced when the heater end is inserted into a predetermined position of the coupling unit. The third switch is closed when this displaceable member is displaced. This third switch is connected in series between the first switch and the control circuit. The high frequency radio wave generator or the heater is not connected to the power supply unless the heater end is completely connected to the heater coupling unit. Accordingly, it can prevent external leakage of the radio wave, dielectric breakdown accident or the like.