Electrical trigger circuit

Claim 1

AN ELECTRICAL TRIGGER CIRCUIT COMPRISING A PNP TRANSISTOR AND AN NPN TRANSISTOR, EACH TRANSISTOR HAVING BASE, COLLECTOR, AND EMITTER ELECTRODES, MEANS INCLUDING AT LEAST ONE RESISTANCE FOR COUPLING THE BASE OF EACH TRANSISTOR TO AN ELECTRODE OF THE OTHER TRANSISTOR SO THAT CURRENT FLOWING THROUGH THE EMITTER-COLLECTOR CIRCUIT OF EACH TRANSISTOR IS AMPLIFIED BY THE OTHER TRANSISTOR, WHEREBY SAID TWO TRANSISTORS FORM A BISTABLE CIRCUIT, MEANS COMPRISING A VOLTAGE PULSE SOURCE FOR APPLYING A REFERENCE VOLTAGE TO AN ELECTRODE OF ONE OF SAID TRANSISTORS, MEANS FOR APPLYING A CONTROL VOLTAGE TO THE BASE ELECTRODE OF SAID ONE TRANSISTOR WHEREBY SAID ONE TRANSISTOR SWITCHES "ON" OR "OFF" RESPONSIVE TO CHANGES IN THE POLARITY OF SAID CONTROL VOLTAGE RELATIVE TO SAID REFERENCE VOLTAGE, MEANS ASSOCIATED WITH SAID CONTROL VOLTAGE APPLYING MEANS FOR SELECTING THE TIME REQUIRED FOR SAID ONE TRANSISTOR TO SWITCH "ON" OR "OFF," AND LOAD CIRCUIT MEANS CONTROLLED BY CURRENT IN THE EMITTER-COLLECTOR CIRCUIT OF THE OTHER TRANSISTOR WHEN SAID ONE TRANSISTOR IS SWITCHED ON.