Cooking utensil detection method

Details Cooking utensil detection method Cooking utensil detection method

1997-11-17

1999-05-04

Walberg, Teresa

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

219518, 219626, H05B 368, H05B 102, H05B 612

Patent

active

059001747

ABSTRACT:
A method is described of processing an electrical signal output from a sensor coil located in an electric heater for use under a cook top in a cooking appliance. The sensor coil is employed to operate a switch to switch on and off a heating element in the heater in accordance with placement and removal of a cooking utensil on and from the cook top. The sensor coil is arranged in the heater within magnetic influence of the electrical heating element, the heating element comprising a material which is ferromagnetic below and substantially non-ferromagnetic above a predetermined temperature within an operating temperature range of the heater. The occurrence of an increase in output signal level from the sensor coil is detected and closure of the switch is effected. Subsequently, the occurrence of a decrease in output signal level from the sensor coil is detected and opening of the switch is effected. The switch is opened for a predetermined period and closure of the switch means is subsequently effected unless within the predetermined time period a further decrease in output signal level, consecutive with the previous decrease in output signal level, is detected.

REFERENCES:
patent: 4129767 (1978-12-01), Amagami et al.
patent: 4319109 (1982-03-01), Bowles
patent: 4499368 (1985-02-01), Payne
patent: 5001328 (1991-03-01), Schreder et al.
patent: 5223697 (1993-06-01), Wilde et al.
patent: 5243172 (1993-09-01), Hazen et al.
patent: 5296682 (1994-03-01), Wittauer et al.
patent: 5296684 (1994-03-01), Essig et al.
patent: 5424512 (1995-06-01), Turetta et al.
European Search Report Jun. 30, 1998 EP 97309743.
UK Patent Office Search Report Mar. 10, 1997 GB 9026355.3.

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