Food temperature responsive apparatus for oven control

Details Food temperature responsive apparatus for oven control Food temperature responsive apparatus for oven control

G - Physics

05

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340/159, 341/32.

G05D 23/24 (2006.01) A47J 37/00 (2006.01) F24C 7/08 (2006.01) G01K 7/24 (2006.01) G05B 9/02 (2006.01) H05B 6/68 (2006.01)

Patent

CA 1081346

ABSTRACT OF THE DISCLOSURE Food temperature responsive apparatus for con- trolling an oven. The apparatus includes a temperature sensing thermistor which may be included in a probe adapted for insertion into food being cooked in an oven. The appa- ratus includes simplified and effective means, in the form of voltage dividers and comparators, for performing the functions of de-energizing the oven heating means and energizing an audible alarm when interior food temperature reaches a preset temperature, protecting against an open- circuited or a short-circuited condition in a sensing circuit which includes the thermistor, guarding against responding to transient electrical noise, and latching the oven heating means in a de-energized condition once it has been de-energized. Even though the thermistor has a non-linear resistance versus temperature characteristic, the apparatus provides a linear temperature presetting scale and includes a linear temperature presetting potentio- meter.

263796

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