Pulse-lengthening circuit employing voltage controlled threshold transistor for isolating output from input during pulse producing period

Claim 1

A CIRCUIT FOR PRODUCING LENGTHENED OUTPUT PULSES, SAID CIRCUIT COMPRISING POSITIVE AND NEGATIVE CONDUCTORS CONNECTED TO OPPOSITE SIDES OF A D.-C. VOLTAGE SOURCE, A VOLTAGE-CONTROLLED THRESHOLD TRANSISTOR CONNECTED ACROSS SAID CONDUCTORS, MEANS NORMALLY BIASING SAID TRANSISTOR TO BE NONCONDUCTING, A CAPACITOR CONNECTED ACROSS SAID CONDUCTORS TO BE CHARGED THEREBY AND TO REMAIN CHARGED WHILE SAID TRANSISTOR IS NONCONDUCTING, MEANS CONNECTED WITH SAID TRANSISTOR FOR APPLYING WEAK IRREGULAR INPUT PULSES OF SHORT DURATION RELATIVE TO SAID OUTPUT PULSES, THEREBY OVERCOMING THE THRESHOLD BIAS AND RENDERING SAID TRANSISTOR MOMENTARILY CONDUCTIVE TO DISCHARGE SAID CAPACITOR, SAID TRANSISTOR AT TURN-OFF ACTING TO ISOLATE THE OUTPUT FROM FURTHER INPUT PULSES, AND MEANS CONNECTED ACROSS SAID THE CHARGING TIME OF SAID CAPACITOR DETERMINING THE DURATION OF OUTPUT PULSES, AND MEANS CONNECTED ACROSS SAID CONDUCTORS AND CONTROLLED BY SAID CAPACITOR''S CHARGING FOR TRANSMITTING OUTPUT PULSES OF LENGTHENED DURATION AND GREATER MAGNITUDE THAN THE INPUT PULSES.