Condition responsive control network

Claim 1

IN A TEMPERATURE RESPONSIVE CONTROL SYSTEM THE COMBINATION OF A DIRECT CURRENT SOURCE, FIRST AND SECOND PAIRS OF RESISTORS, EACH PAIR RESPECTIVELY CONNECTED IN SERIES ACROSS SAID SOURCE TO PROVIDE A VOLTAGE DIVIDING BRIDGE, A RESISTOR OF SAID FIRST PAIR COMPRISING A THERMISTOR WHOSE RESISTANCE VARIES INVERSELY WITH TEMPERATURE CHANGE, FIRST AND SECOND TRANSISTORS HAVING THEIR RESPECTIVE BASES CONNECTED TO THE JUNCTION OF THE RESISTORS OF EACH PAIR AND THEIR EMITTERS CONNECTED TOGETHER IN PARALLEL RELATIONSHIP THROUGH A COMMON RESISTOR WITH ONE JUNCTION OF SAID PAIRS OF RESISTORS WHEREBY THE EMITTER POTENTIAL OF BOTH OF SAID TRANSISTORS VARIES SIMULTANEOUSLY AND TO THE SAME DEGREE IN ACCORDANCE WITH CHANGES IN THE RESISTANCE OF SAID THERMISTOR, THE COLLECTORS OF SAID FIRST AND SECOND TRANSISTORS BEING CONNECTED IN PARALLEL TO THE SECOND JUNCTION OF SAID PAIRS OF RESISTORS, THE COLLECTOR CIRCUIT OF SAID FIRST TRANSISTOR INCLUDING NORMALLY-ENERGIZED SERIES-CONNECTED ELECTROMAGNETIC RELAY MEANS AND THE COLLECTOR CIRCUIT OF SAID SECOND TRANSISTOR INCLUDING A SERIES CONNECTED RESISTOR, AND A REGENERATIVE FEED BACK CIRCUIT INCLUDING A SERIES CONNECTED RESISTOR CONNECTING THE COLLECTOR CIRCUIT OF SAID SECOND TRANSISTOR TO THE BASE OF SAID FIRST TRANSISTOR, THE RESISTANCES OF SAID RESISTORS BEING SELECTED THAT WHEN SAID FIRST TRANSISTOR IS CONDUCTING SAID SECOND IS NON-CONDUCTING AND VICE VERSA, THE COLLECTOR POTENTIAL OF SAID SECOND TRANSISTOR WHEN IN CONDUCTING CONDITION BEING IMPRESSED ON THE BASE OF SAID FIRST TRANSISTOR TO RETAIN SAID FIRST TRANSISTOR BIASED BY A WIDE MARGIN IN A NON-CONDUCTING CONDITION WHEREBY SAID RELAY IS ENERGIZED AND DE-ENERGIZED AT SUBSTANTIALLY DIFFERENT DEGREES OF TEMPERATURE.