H - Electricity – 05 – B
Patent
H - Electricity
05
B
327/14
H05B 6/12 (2006.01) G01S 15/00 (2006.01) H05B 6/06 (2006.01)
Patent
CA 1149883
ABSTRACT OF THE DISCLOSURE: A plurality of magnetic field sensors are mounted adjacent the periphery of an induction heating coil of flat, spiral configuration which is energized by ultrasonic frequency energy to generate a time-varying magnetic field. The magnetic field sensors are connected in a circuit to produce an output signal when a magnetic utensil load is placed asymmetrically with respect to the center of the induction heating coil. In response to sensor output signal exceeding a predetermined value, a warning indication is provided. The ultrasonic energy level is reduced in response to the warning indication to minimize radio interference which would otherwise occur due to leakage magnetic flux.
357287
Amagami Keizo
Kobayashi Takao
Mizukawa Takumi
Matsushita Electric Industrial Co. Ltd.
Robic Robic & Associes/associates
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