Alternating current generator regulating system with pulse control signal

Claim 1

IN A SYSTEM FOR MAINTAINING A DESIRED VOLTAGE OUTPUT LEVEL FROM A THREE-PHASE ALTERNATING CURRENT GENERATOR HAVING A FIELD WINDING OPERATIVE TO CONTROL THE GENERATOR OUTPUT POTENTIAL, THE COMBINATION OF A SENSING CIRCUIT OPERATIVE FROM THE GENERATOR OUTPUT POTENTIAL TO DEVELOP CONTROL PULSES HAVING A TIME DURATION INVERSELY RELATED TO THE MAGNITUDE OF THE OUTPUT POTENTIAL, SAID SENSING MEANS COMPRISING RECTIFYING MEANS FOR DEVELOPING FROM THE OUTPUT POTENTIAL A VARYING POTENTIAL UNIPOLAR SIGNAL, CIRCUIT MEANS FOR CHANGING THE REFERENCE LEVEL OF SAID VARYING POTENTIAL SIGNAL TO DERIVE THEREFROM A BIPOLAR SIGNAL, FILTER MEANS CONNECTED TO SAID CIRCUIT MEANS TO REDUCE BUT NOT ELIMINATE RIPPLE FROM SAID VARYING POTENTIAL SIGNAL, AND SWITCHING MEANS OPERATIVE ONLY IN RESPONSE TO ONE POLARITY OF SAID BIPOLAR SIGNAL TO PROVIDE CONTROL PULSE OF DISCRETE DURATION; AND CONTROL CIRCUIT MEANS OPERATIVE FROM THE GENERATOR OUTPUT POTENTIAL TO SELECTIVELY ENERGIZE THE FIELD WINDING FOR THE TIME DURATION OF SAID CONTROL PULSES, SAID SENSING CIRCUIT AND SAID CONTROL CIRCUIT MEANS BEING OPERATIVAE FROM DIFFERENT HALF-CYCLES OF THE GENERATOR OUTPUT POTENTIAL.