Transistorized monitoring circuit

Claim 1

A CIRCUIT FOR MONITORING THE MAGNITUDE OF A FIRST ELECTRIC SIGNAL AND PRODUCING AN INDICATION WHENEVER THE MAGNITUDE OF SAID FIRST ELECTRICAL SIGNAL DEVIATES BEYOND AT LEAST ONE PREDETERMINED LIMIT, SAID CIRCUIT COMPRISING A SOURCE OF DIRECT CURRENT POTENTIAL, FIRST AND SECOND TRANSISTORS HAVING THEIR EMITTERS CONNECTED IN COMMON TO THE POSITIVE SIDE OF SAID SOURCE THROUGH A FIRST RESISTOR AND HAVING THE BASE OF SAID FIRST TRANSISTOR AND THE COLLECTOR OF SAID SCOND TRANSISTOR CONNECTED IN COMMON TO THE NEGATIVE SIDE OF SAID SOURCE THROUGH A SECOND RESISTOR, AN INDICATOR CONNECTED BETWEEN THE COLLECTOR OF SAID FIRST TRANSISTOR AND THE NEGATIVE SIDE OF SAID SOURCE, MEANS INCLUDING SAID SOURCE NORMALLY BIASING SAID SECOND TRANSISTOR TO A PREDETERMINED CONDUCTIVE LEVEL SUCH THA ITS EMITTER TO COLLECTOR POTENTIAL MAINTAINS SAID FIRST TRANSSISTOR NONCONDUCTIVE, MEANS FOR CONTINUOUSLY APPLYING TO THE EMITTER BASE CIRCUIT OF SAID SECOND TRANSISTOR TO A DIRECT CURRENT SIGNAL PROPORTION IN MAGNITUDE TO THE MAGNITUDE OF SAID FIRST ELECTRICAL SIGNAL IN OPPOSITION TO THE POTENTIAL APPLIED TO SAID SECOND TRANSISTOR EMITTER BASE CIRCUIT BY SAID BIASING MEANS WHEREBY, WHEN SAID DIRECT CURRENT SIGNAL REACHES A PREDETERMINED MAGNITUDE, THE EMITTER COLLECTOR POTENTIAL OF SAID SECOND TRANSISTOR PERMITS INITIATION OF CONDUCTION BY SAID FIRST TRANSISTOR AND, UPON INITIATION OF CONDUCTION OF SAID FIRST TRANSISTOR, THE VOLTAGE DROP INDUCED THEREBY IN SAID FIRST RESISTOR AUGMENTS THE EFFECT OF SAID APPLIED DIRECT CURRENT SIGNAL.