Temperature protection circuit

Claim 1

A CONTROL CIRCUIT FOR USE IN ENERGIZING AND DEENERGIZING A LOAD IN RESPONSE TO VARIATIONS OF A CONDITION AT SAID LOAD COMPRISING SWITCH MEANS FOR CONNECTING AND DISCONNECTING SAID LOAD AND A SOURCE OF ELECTRICAL ENERGY, A RELAY HAVING AN ACTUATOR AND A PAIR OF CONTACTS, SAID CONTACTS BEING CONNECTED IN CIRCUIT WITH SAID SWITCH MEANS FOR ENERGIZING SAID SWITCH MEANS, AN ELECTRON CONTROL DEVICE CONNECTED IN CIRCUIT WITH SAID ACTUATOR FOR ENERGIZING SAID ACTUATOR, BIAS MEANS FOR CONTROLLING CONDUCTION OF SAID DEVICE, SAID BIAS MEANS COMPRISING MEANS RESPONSIVE TO VARIATIONS OF SAID CONDITION SUCH THAT AT A FIRST VALUE OF SAID CONDITION SAID BIAS MEANS CAUSES SAID DEVICE TO ENERGIZE SAID ACTUATOR AND FEEDBACK MEANS, SAID FEEDBACK MEANS BEING COUPLED BETWEEN SAID SWITCH MEANS AND SAID DEVICE SUCH THAT SAID FEEDBACK MEANS IS RENDERED OPERATIVE BY ACTUATION OF SAID CONTACTS WHEN SAID ACTUATOR IS ENERGIZED BY SAID DEVICE, SAID FEEDBACK MEANS BEING ADAPTED UPON BEING SO RENDERED OPERATIVE TO MODIFY THE BIASING EFFECT OF SAID BIAS MEANS SUCH THAT SAID CONDITION MUST REACH A SECOND VALUE BEFORE SAID BIAS MEANS IS EFFECTIVE TO CAUSE SAID DEVICE TO DEENERGIZE SAID ACTUATOR, SAID FEEDBACK MEANS BEING RENDERED INOPERATIVE BY ACTUATION OF SAID CONTACTS IN RESPONSE TO SAID ACTUATOR BEING DEENERGIZED BY SAID DEVICE.