Temperature-stabilized voltage-sensitive bistable control circuit

Claim 1

A TEMPERATURE-STABILIZED VOLTAGE BISTABLE CONTROL CIRCUIT ADAPTED TO RECEIVE A VARIABLE-POTENTIAL INPUT SIGNAL AND IN RESPONSE THERETO ASSUME A FIRST STABLE STATE WHEN THE INPUT SIGNAL POTENTIAL IS ABOVE A PREDETERMINED POTENTIAL AND TO SWITCH TO THE SECOND STABLE STATE WHEN THEREAFTER THE INPUT SIGNAL POTENTIAL DECREASES TO A POTENTIAL BELOW SAID PREDETERMINED POTENTIAL, AND TO PROVIDE AN OUTPUT CONTROL SIGNAL CORRESPONDING TO THE CURRENT STATE OF OPERATION OF THE CIRCUIT, SAID CIRCUIT COMPRISING: FIRST MEANS, INCLUDING LINES SUPPLYING REGULATED POWER; SECOND MEANS, INCLUDING A BISTABLE TRIGGER CIRCUIT CONNECTED TO SAID LINES TO BE ENERGIZED THEREFROM, AND MEANS FOR SUPPLYING A VARIABLE POTENTIAL INPUT SIGNAL TO SAID TRIGGER CIRCUIT TO CONTROL THE STATE OF OPERATION THEREOF, SAID TRIGGER CIRCUIT COMPRISING FIRST AND SECOND CROSS-CONNECTED TRANSISTORS PHYSICALLY DISPOSED TO OPERATE IN THE SAME ENVIRONMENT AND EACH SUBJECT TO CHANGE OF BASE-TO-EMITTER VOLTAGE DRIP INCIDENT TO CHANGE OF TEMPERATURE OF SAID ENVIRONMENT, AND AN OUTPUT SIGNAL LINE CONNECTED TO SAID TRIGGER CIRCUIT TO PROVIDE OUTPUT SIGNALS CORRESPONDING TO THE RESPECTIVE STATES OF OPERATION OF SAID BISTABLE TRIGGER CIRCUIT; AND THIRD MEANS, CONNECTED TO SAID FIRST MEANS AND SAID SECONE MEANS AND INCLUDING SEMICONDUCTOR JUNCTION MEANS RESPONSIVE TO SAID CHANGE OF THE AMBIENT TEMPERATURE, TO VARIABLY BIAS SAID FIRST AND SECOND TRANSISTORS, OPPOSITELY TO THE CHANGE OF BASE-TO-EMITTER VOLTAGE DROP THEREIN INCIDENT TO SUCH TEMPERATURE CHANGE; WHEREBY THE EFFECTS OF VARIATION OF AMBIENT TEMPERATURE ON SAID TRIGGER CIRCUIT ARE SUBSTANTIALLY COMPENSATED BY SAID THIRD MEANS.