H - Electricity – 05 – B
Patent
H - Electricity
05
B
327/19
H05B 6/12 (2006.01) H05B 6/06 (2006.01)
Patent
CA 1167112
ABSTRACT OF THE DISCLOSURE A sensor arrangement for an induction heating apparatus which monitors the position of a cooking utensil on a work surface and disables an inverter circuit powering a work coil if the utensil is located at an off-center position with respect to the coil, or if no utensil is present upon the cooking surface. The sensor arrangement comprises a plurality of sets of sensors at successively larger distances from the center of the work surface. Each set comprises a plurality of sensors arranged on an imaginary circle substantially equidistant from each other. Each sensor operates to provide an indication of the presence or absence of a utensil directly above the sensor. The sensors are monitored by a logic arrangement which indicates whether a utensil is properly centered, based on the fullness or degree of activation of the various sets. If the utensil is not properly positioned, the inverter is disabled and a signal advises the user of this condition. Additionally, the logic circuit determines the size of a properly positioned utensil and generates a signal which may be utilized to alter the output of the work coil in accordance therewith.
367218
Company General Electric
Eckersley Raymond A.
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