Temperature compensated transistor sensing circuit

Claim 1

A TEMPERATURE COMPENSATED ELECTRICAL TRANSDUCER SYSTEM, COMPRISING: A TRANSISTOR INCLUDING A BASE, EMITTER, AND COLLECTOR; A SOURCE OF VOLTAGE HAVING FIRST AND SECOND OUTPUT TERMINALS, SAID SOURCE OF VOLTAGE INCLUDING A TEMPERATURE SENSITIVE SWITCH AND A HEATING RESISTOR MOUNTED IN A HEAT-TRANSFER RELATIONSHIP WITH SAID TRANSISTOR, SAID SWITCH BEING CONNECTED TO ENERGIZE SAID HEATING RESISTOR AND RESPONSIVELY ACTUATED TO MAINTAIN SAID TRANSISTOR WITHIN A CERTAIN TEMPERATURE RANGE WHEREBY OPERATION OF SAID SYSTEM IS STABILIZED; A VOLTAGE DIVIDER INCLUDING A TRANSDUCER HAVING A RELATIVELY LOW IMPEDANCE VARYING IN ACCORDANCE WITH A SENSED PHENOMENA AND CONNECTED IN SERIES WITH A RESISTOR, THE FREE END OF SAID TRANSDUCER BEING CONNECTED TO SAID FIRST OUTPUT TERMINAL, THE COMMON JUNCTION BETWEEN SAID TRANSDUCER AND RESISTOR BEING CONNECTED TO SAID BASE, AND THE FREE END OF SAID RESISTOR BEING CONNECTED TO SAID SECOND OUTPUT TERMINAL; A POTENTIOMETER CONNECTED BETWEEN SAID FIRST AND SECOND OUTPUT TERMINALS AND HAVING AN ADJUSTABLE OUTPUT TAP CONNECTED TO SAID EMITTER FOR BIASING THE SAME; AND AN ADJUSTABLE RESISTOR CONNECTED BETWEEN SAID COLLECTOR AND SAID SECOND OUTPUT TERMINAL FOR PROVIDING AN OUTPUT SIGNAL ACROSS SAID ADJUSTABLE RESISTOR, SAID POTENTIOMETER TAP BEING ADJUSTABLE FOR VARYING THE BIAS ON SAID EMITTER AND ESTABLISHING A CUT-OFF POINT FOR SAID TRANSISTOR AT A FIRST PREDETERMINED IMPEDANCE OF SAID TRANSDUCER AND SAID ADJUSTABLE RESISTOR BEING ADJUSTABLE FOR ESTABLISHING A MAXIMUM MAGNITUDE OF SAID OUTPUT SIGNAL AT A SECOND PREDETERMINED IMPEDANCE OF SAID TRANSDUCER.