Electric heating – Metal heating – Of cylinders
Patent
1980-07-30
1984-05-08
Reynolds, B. A.
Electric heating
Metal heating
Of cylinders
219 1077, 219 1067, 219518, 340686, 324260, 99DIG14, H05B 612
Patent
active
044476914
ABSTRACT:
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 ciruit 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 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.
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patent: 4319109 (1982-03-01), Bowles
Amagami Keizo
Kobayashi Takao
Mizukawa Takumi
Leung Philip H.
Matsushita Electric Industrial Company Limited
Reynolds B. A.
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