Bistable trigger circuit with feedback amplifier

Claim 1

A BISTABLE CIRCUIT TO BE CONTROLLED BY ALTERNATE POLARITY PULSES, COMPRISING A DIRECT CURRENT POWER SOURCE; A DIRECT CURRENT AMPLIFIER HAVING AN OUTPUT CIRCUIT CONNECTED WITH SAID POWER SOURCE AND HAVING A CONTROL ELECTRODE CONNECTED TO RECEIVE SAID PULSES FOR ALTERNATELY RENDERING THE OUTPUT CIRCUIT CONDUCTIVE AND NONCONDUCTIVE; FIXED BIAS MEANS CONNECTED WITH SAID CONTROL ELECTRODE AND TENDING TO ESTABLISH ONE CONDITION OF OUTPUT CIRCUIT CONDUCTIVITY; A SECOND BIAS MEANS CONNECTED WITH SAID CONTROL ELECTRODE AND INCLUDING A SOURCE OF ALTERNATING CURRENT AND RECTIFIER MEANS CONNECTED TO SAID ALTERNATING CURRENT SOURCE WITH SUCH POLARITY AS TO DELIVER A UNIDIRECTIONAL SECOND BIAS OPPOSITE IN POLARITY TO AND GREATER THAN SAID FIXED BIAS; AND A GATE CONNECTED WITH SAID SECOND BIAS MEANS AND HAVING GATE CONTROL MEANS CONNECTED WITH SAID OUTPUT CIRCUIT FOR COMPLETING THE CIRCUIT THROUGH THE GATE FROM THE SECOND BIAS MEANS TO APPLY UNIDIRECTIONAL SECOND BIAS TO THE CONTROL ELECTRODE WHEN A PULSE OF POLARITY THE SAME AS THAT OF THE UNIDIRECTIONAL SECOND BIAS ESTABLISHES THE CORRESPONDING CONDITION OF CONDUCTIVITY IN THE OUTPUT CIRCUIT, WHEREBY THE CONDITION OF CONDUCTIVITY OF SAID AMPLIFIER, AS DICTATED BY A GIVEN PULSE, IS PRESERVED UNTIL THE OCCURRENCE OF A SUBSEQUENT PULSE.