Counter driving circuit

Claim 1

AN ELECTROMAGNETIC COUNTER DRIVING CIRCUIT COMPRISING AN INPUT TERMINAL FOR RECEIVING INPUT COUNT PULSES, A NORMALLY NON-CONDUCTING CONTROLLED RECTIFIER, MEANS TO FEED AN INPUT PULSE FROM SAID INPUT TERMINAL TO THE GATE ELECTRODE OF SAID CONTROLLED RECTIFIER THEREBY RENDERING SAID RECTIFIER CONDUCTING, A COUNTER SOLENOID COIL CONNECTED TO SAID CONTROLLED RECTIFIER FOR CONDUCTING CURRENT SIMULTANEOUSLY THEREWITH, A NORMALLY NON-CONDUCTING CONTROLLED SWITCH, A TIMING CAPACITOR CONNECTED BETWEEN SAID CONTROLLED RECTIFIER AND CONTROLLED SWITCH, AN IMPEDANCE CONNECTED TO SAID CAPACITOR AND TO SAID CONTROLLED SWITCH, SAID CONTROLLED RECTIFIER SUPPLYING CURRENT TO CHARGE SAID CAPACITOR AND DEVELOP ACROSS SAID INPEDANCE, A BIAS POTENTIAL FOR MAINTAINING SAID CONTROLLED SWITCH NON-CONDUCTING, SAID BIAS POTENTIAL FALLING EXPONENTIALLY AS SAID CAPACITOR CHARGES, AND MEANS FOR APPLYING A GATE POTENTIAL TO THE GATE ELECTRODE OF SAID CONTROLLED SWITCH, SAID CONTROLLED SWITCH BECOMING CONDUCTING WHEN SAID GATE POTENTIAL EXCEEDS SAID BIAS POTENTIAL BY AN AMOUNT SUFFICIENT TO FIRE SAID SWITCH, THE FIRING OF SAID CONTROLLED SWITCH GENERATING A VOLTAGE PULSE WHICH IS COUPLED THROUGH SAID CAPACITOR TO REVERSE-BIAS SAID CONTROLLED RECTIFIER THEREBY RENDERING SAID CONTROLLED RECTIFIER NON-CONDUCTING AND INTERRUPTING THE CURRENT FLOWING THROUGH SAID COUNTER SOLENOID COIL.