Apparatus for control of cooking temperatures

Claim 1

A HEAT CONTROL SYSTEM FOR A COOKING UNTENSIL HEATED BY AN ELECTRIC HEATING UNIT COMPRISING: A TEMPERATURE SENSING MEMBER IN HEAT TRANSFER RELATION WITH THE UTENSIL, SAID SENSING MEMBER INCLUDING A FIRST PAIR OF CONTACTS, A FIRST BIMETAL ACTUATOR, A FIRST ELECTRIC HEATER, AND WALL MEANS DEFINING AN ENCLOSURE THEREFOR, SAID FIRST BIMETAL ACTUATOR BEING ARRANGED TO OPEN SAID FIRST PAIR OF CONTACTS IN RESPONSE TO AN INCREASE IN TEMPERATURE TO A PREDETERMINED LEVEL ABOVE THE MAXIMUM COOKING TEMPERATURE OF SAID UTENSIL AND TO CLOSE SAID FIRST PAIR OF CONTACTS IN RESPONSE TO A DECREASE IN TEMPERATURE BELOW SAID PREDETERMINED LEVEL, SAID FIRST HEATER AND SAID FIRST PAIR OF CONTACTS BEING CONNECTED IN SERIES IN A CIRCUIT ADAPTED TO BE ENERGIZED BY AN ELECTRIC POWER SOURCE; A MANUALLY OPERABLE TEMPERATURE SELECTOR MEMBER INCLUDING A SECOND PAIR OF CONTACTS FOR REGULATING THE SUPPLY OF ELECTRIC POWER TO SAID HEATING UNIT, A SECOND BIMETAL ACTUATOR ARRANGED TO MOVE ONE OF SAID SECOND PAIR OF CONTACTS TOWARD THE OTHER CONTACT IN RESPONSE TO A PREDETERMINED INCREASE IN TEMPERATURE, A SECOND ELECTRIC HEATER IN HEAT TRANSFER RELATION WITH SAID SECOND BIMETAL ACTUATOR, MANUALLY OPERABLE MEANS FOR VARYING THE POSITION OF ONE OF SAID SECOND PAIR OF CONTACTS; AND ELECTRIC CIRCUIT MEANS INCLUDING MEANS CONNECTING SAID SECOND HEATER IN SERIES WITH SAID FIRST PAIR OF CONTACTS, AND MEANS CONNECTING SAID SECOND PAIR OF CONTACTS WITH SAID HEATING UNIT SO AS TO CONTROL THE SUPPLY OF POWER THERETO, WHEREBY SAID FIRST AND SECOND HEATERS ARE ENERGIZED AND DE-ENERGIZED SIMULTANEOUSLY AND SAID SECOND PAIR OF CONTACTS ARE OPENED AND CLOSED IN ACCORDANCE WITH THE TEMPERATURE OF SAID SENSING MEMBER AND THE SETTING OF SAID MANUALLY OPERABLE MEANS.