Proportional pulse servo system

Claim 1

IN A SERVO POSITIONING SYSTEM INCLUDING A SOURCE OF ERROR VOLTAGE INDICATIVE OF THE EXTENT OF DEVIATION OF A CONTROLLED MEMBER FROM A COMMANDED POSITION, CONTROL MEANS FOR RESTORING SAID CONTROL MEMBER TO SAID COMMANDED POSITION COMPRISING AN AMPLIFIER RECEIVING SAID ERROR SIGNAL, THRESHOLD SENSING MEANS CONNECTED TO THE OUTPUT OF SAID AMPLIFIER, POSITIVE FEEDBACK MEANS CONNECTED BETWEEN THE OUTPUT OF SAID THRESHOLD SENSING MEANS AND THE INPUT TO SAID AMPLIFIER, ELECTRONIC SWITCHING MEANS CONNECTED TO THE OUTPUT OF SAID THRESHOLD SENSING MEANS, SAID ELECTRONIC SWITCHING MEANS INCLUDING A SOURCE OF DIRECT CURRENT VOLTAGE AND BEING RESPONSIVE TO AN OUTPUT FROM SAID THRESHOLD SENSING MEANS TO CONNECT SAID DIRECT CURRENT VOLTAGE SOURCE TO AN OUTPUT TERMINAL, POSITIONING MEANS CONNECTED TO SAID OUTPUT TERMINAL AND RESPONSIVE TO THE PRESENCE OF SAID D.C. VOLTAGE THEREON TO POSITION SAID CONTROL MEANS TOWARD SAID COMMANDED POSITION, NEGATIVE FEEDBACK MEANS CONNECTED BETWEEN SAID OUTPUT TERMINAL AND THE INPUT OF SAID AMPLIFIER, SAID NEGATIVE FEEDBACK MEANS INCLUDING DELAY MEANS THROUGH WHICH SAID D.C. VOLTAGE ON SAID OUTPUT TERMINAL IS APPLIED TO THE INPUT OF SAID AMPLIFIER, SAID D.C. VOLTAGE HAVING A MAGNITUDE SUFFICIENT TO REDUCE THE OUTPUT OF SAID AMPLIFIER BENEATH SAID PREDETERMINED THRESHOLD, SAID NEGATIVE FEEDBACK MEANS INCLUDING FURTHER MEANS BY WHICH SAID NEGATIVE FEEDBACK VOLTAGE IS REDUCED IN A TIME CONTROLLED MANNER UPON SAID AMPLIFIER OUTPUT SIGNAL FALLING BENEATH SAID PREDETERMINED MAGNITUDE WHEREBY SAID INPUT SIGNAL AND SAID NEGATIVE FEEDBACK SIGNAL DIFFERENTIALLY COMBINE TO PRODUCE AN AMPLIFIER OUTPUT SIGNAL IN THE FORM OF SEQUENTIAL PULSES, THE DURATION OF WHICH AND RATE OF DEVELOPMENT OF WHICH ARE EACH PROPORTIONAL TO SAID ERROR VOLTAGE, SAID SEQUENCE OF PULSES BEING DEVELOPED UNTIL SAID ERROR INPUT SIGNAL IS REDUCED TO THAT LEVEL CORRESPONDING TO AN AMPLIFIER OUTPUT SIGNAL BENEATH SAID PREDETERMINED AMPLITUDE.