Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1982-02-08
1984-05-22
Reynolds, B. A.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
219 1055B, 219 1055R, 126 21A, 126285B, 126285R, 110163, 159 41, 236 1G, 431 20, H05B 668
Patent
active
044503440
ABSTRACT:
A combined microwave and electric heater oven includes a fan system for cooling a magnetron, and a damper for selectively introducing a forced air flow generated by the fan system into an oven cavity. A damper cam is secured to a drive shaft of a damper motor, and a damper link is disposed between the damper cam and the damper to drive the damper. A microswitch is disposed near the damper cam so that the microswitch develops a first detection signal when the damper is tightly closed. In response to the first detection signal, the rotation of the damper motor is terminated to hold the damper in the tightly closed state. The microswitch develops a second detection signal when the damper is placed in the full-open state. In response to the second detection signal, the rotation of the damper motor is terminated to hold the damper in the full-open state.
REFERENCES:
patent: 3773028 (1973-11-01), Schreibeis
patent: 4189090 (1980-02-01), Drinkuth
patent: 4240397 (1980-12-01), Seidel
Matsubayashi Kazuyuki
Sakoda Yasuhiro
Leung Philip H.
Reynolds B. A.
Sharp Kabushiki Kaisha
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