Gated pulse generator with time delay

Claim 1

A GATED PULSE GENERATOR WITH DELAYED OPERATION AFTER GATING, COMPRISING (A) A RELAXATION OSCILLATOR INCLUDING A VOLTAGE RESPONSIVE SEMICONDUCTOR SWITCH WHICH IS DRIVEN INTO THE CONDUCTIVE STATE AND PRODUCES AN OUTPUT PULSE IF THE VOLTAGE APPLIED TO ONE OF ITS TERMINALS EXCEEDS A PREDETERMINED LEVEL; (B) A SOURCE OF ENERGIZING VOLTAGE; (C) A FIRST R-C NETWORK COUPLED TO SAID SOURCE AND TO SAID SWITCH; (D) GATING MEANS RESPONSIVE TO A GATING PULSE FOR COMPLETING A CONDUCTIVE PATH BETWEEN SAID R-C NETWORK AND SAID SOURCE, WHEREBY THE CAPACITOR IN SAID NETWORK CHARGES TOWARD THE PREDETERMINED VOLTAGE AND CAUSES SAID SWITCH TO CONDUCT AND DISCHARGE SAID CAPACITOR A FIXED PERIOD OF TIME AFTER THE APPEARANCE OF A GATING PULSE; (E) A SECOND R-C NETWORK FOR LIMITING THE DISCHARGE OF THE CAPACITOR OF SAID FIRST NETWORK WHENEVER SAID SWITCH CONDUCTORS SO THAT THE CAPACITOR OF SAID FIRST NETWORK BEGINS TO CHARGE AGAINST TOWARDS SAID PREDETERMINED VOLTAGE LEVEL, SAID FIRST NETWORK ESTABLISHING THE TIME REQUIRED TO GENERATE THE FIRST OUTPUT PULSE AFTER GATING AND SAID FIRST AND SECOND NETWORK FORMING A HYBRID TIMING NETWORK FOR ESTABLISHING THE FREE-RUNNING OUTPUT PULSE REPETITION RATE AFTER THE FIRST OUTPUT PULSES; AND (F) MEANS FOR PRODUCING AN OUTPUT WHENEVER SAID GATING PULSE TERMINATES.