Ultra-long monostable multivibrator employing bistable semiconductor switch to allowcharging of timing circuit

Claim 1

A TRIGGERED CIRCUIT FOR GENERATING AN OUTPUT PULSE OF A PREDETERMINED DURATION, COMPRISING: A SEMICONDUCTOR SWITCH HAVING A FIRST CURRENT BLOCKING STATE AND A SECOND CURRENT CONDUCTING STATE, CONTROLLED BIAS SUPPLY MEANS FOR SUPPLYING A BIAS POTENTIAL TO SAID SEMICONDUCTOR SWITCH, A TRIGGER PULSE SOURCE FOR APPLYING A TRIGGER PULSE TO SAID SEMICONDUCTOR SWITCH TO CAUSE SAID SWITCH TO CHANGE FROM ITS FIRST CURRENT BLOCKING STATE TO ITS SECOND CURRENT CONDUCTING STATE A TIMING NETWORK CONNECTED TO SAID SEMICONDUCTOR SWITCH AND TO SAID CONTROLLED BIAS SUPPLY MEANS, SAID TIMING NETWORK BEING ENERGIZED BY THE CURRENT FLOWING THROUGH SAID SEMICONDUCTOR SWITCH AND PRODUCING A CONTROL VOLTAGE A PREDETERMINED TIME AFTER BEING ENERGIZED, SAID CONTROL VOLTAGE BEING APPLIED TO SAID BIAS SUPPLY MEANS TO MOMENTARILY REMOVE THE APPLICATION OF BIAS POTENTIAL FROM THE SEMICONDUCTOR SWITCH WHEREBY SAID SEMICONDUCTOR SWITCH REVERTS TO ITS INITIAL CURRENT BLOCKING STATE.