Oscillator trigger circuit including unidirectional conducting device in the feedback path thereof

Claim 1

AN OSCILLATOR TRIGGER COMPRISING: A UNIDIRECTIONAL CONDUCTING DEVICE HAVING AN ANODE AND A CATHODE AND HAVING A GIVEN FORWARD INCREMENTAL IMPEDANCE AND A SUBSTANTIALLY LOWER FORWARD INCREMENTAL IMPEDANCE WHEN THE CURRENT FLOWING THERETHROUGH EXCEEDS A PREDETERMINED VALUE; A FIRST TRANSISTOR HAVING A BASE ELECTRODE, A COLLECTOR ELECTRODE AND AN EMITTER ELECTRODE; MEANS CONNECTING A BIAS POTENTIAL TO SAID FIRST TRANSISTOR; A FIRST TRANSFORMER HAVING A SECONDARY WINDING CONNECTED IN SERIES WITH SAID BASE ELECTRODE AND A PRIMARY WINDING ADAPTED TO RECEIVE INPUT SIGNALS; A SECOND TRANSISTOR HAVING A BASE ELECTRODE, A COLLECTOR ELECTRODE, AND AN EMITTER ELECTRODE; MEANS CONNECTING A BIAS POTENTIAL TO SAID SECOND TRANSISTOR; A SECOND TRANSFORMER HAVING A PAIR OF MUTUALLY INDUCTIVE PRIMARY WINDINGS AND A SECONDARY WINDING ADAPTED TO PROVIDE AN OUTPUT SIGNAL; A FEEDBACK PATH CONNECTED BETWEEN THE COLLECTOR AND BASE ELECTRODES OF SAID SECOND TRANSISTOR, SAID FEEDBACK INCLUDING, IN SERIES, SAID PAIR OF MUTUALLY INDUCTIVE PRIMARY WINDINGS, A CAPACITOR, AND SAID UNIDIRECTIONAL CONDUCTING DEVICE; SAID UNIDIRECTIONAL CONDUCTING DEVICE HAVING THE CATHODE THEREOF CONNECTED TO SAID CAPACITOR AND TO THE COLLECTOR ELECTRODE OF SAID FIRST TRANSISTOR; SAID SECOND TRANSISTOR BEING IN A SUBSTANTIALLY QUIESCENT STATE WHEN FORWARD BIASED BY SAID UNIDIRECTIONAL CONDUCTING DEVICE HAVING SUBSTANTIALLY SAID GIVEN FORWARD INCREMENTAL IMPEDANCE, WHEREIN AN INPUT SIGNAL APPLIED TO THE PRIMARY WINDING OF SAID FIRST TRANSFORMER INCREASES THE CURRENT FLOWING THROUGH SAID UNIDIRECTIONAL CONDUCTING DEVICE TO A VALUE EXCEEDING SAID PREDETERMINED VALUE CAUSING THE SAID SECOND TRANSISTOR TO PRODUCE OSCILLATIONS.