| 摘要 |
Food temperature responsive apparatus for controlling 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 apparatus 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 opencircuited 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 potentiometer. |
