Pan detector for an induction heating apparatus

Details Pan detector for an induction heating apparatus Pan detector for an induction heating apparatus

1975-01-28

1976-11-23

Reynolds, Bruce A.

Electric heating

Metal heating

Of cylinders

219 1075, 335207, H05B 504

Patent

active

039938859

ABSTRACT:
A pan detector for an induction heating apparatus of the type having an induction heating coil adapted to electromagnetically couple to a cooking vessel comprises a first, vertically movable magnet and a second, fixed magnet spaced therefrom and a reed switch disposed between the first and second magnets. Upon the placement of a cooking vessel of magnetic metal in overlying relation to the heating coil, the first magnet moves upwardy by attraction between the bottom wall of the cooking vessel and the first magnet to result in a change in magnetic flux level in the neighborhood of the reed switch. The reed switch operates in response to the change in magnetic flux level to permit and prevent, respectively, energization of the heating coil. The first and second magnets have their poles oriented in opposition to each other to provide repulsion therebetwen to increase the attraction.

REFERENCES:
patent: 2497753 (1950-02-01), Arnot
patent: 3710062 (1973-01-01), Peters
patent: 3796850 (1974-03-01), Moreland et al.
patent: 3821509 (1974-01-01), Amagami et al.
patent: 3829803 (1974-08-01), Maedu

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