F - Mech Eng,Light,Heat,Weapons – 24 – C
Patent
F - Mech Eng,Light,Heat,Weapons
24
C
327/1.7
F24C 7/02 (2006.01) H05B 6/66 (2006.01) H05B 6/76 (2006.01) H05B 6/80 (2006.01) H05B 11/00 (2006.01)
Patent
CA 1129970
ABSTRACT OF THE DISCLOSURE A microwave heating apparatus comprises a heating chamber, a microwave 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 displace- able member is displaced when the heater end is inserted to a predetermined position in the coupling unit, and the third switch is closed when the displaceable member is displaced. The third switch is connected in series be- tween the first switch and the control circuit. The high frequency radio wave generator or the heater is thus not connected to the power supply unless the heater end is com- pletely connected to the heater coupling unit. According- ly, it can prevent external leakage of microwaves, insu- lation breakdown or other related incidents.
347796
Ridout & Maybee Llp
Tokyo Shibaura Denki Kabushiki Kaisha
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