Temperature compensated timing circuit for use in heating...

Details Temperature compensated timing circuit for use in heating... Temperature compensated timing circuit for use in heating...

A - Human Necessities

47

J

A47J 36/32 (2006.01) A47J 37/08 (2006.01) G04F 10/02 (2006.01) G05D 23/19 (2006.01)

Patent

CA 2307899

The present invention relates to a temperature compensated timer for a heating appliance that heats a food item during a heating cycle. The timer includes a coil having first and second terminals and presenting a resistance between the terminals that is a function of temperature changes of the coil . A timing circuit is coupled to the first and second terminals of the coil. The timing circuit operates to drive a current through the coil to maintain a heating cycle and to generate a delay signal a delay time after the heating cycle is initiated. The delay time has a value that is a function of the resistance of the coil. The delay signal is operable to remove the current from the coil to terminate the heating cycle.

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