Digital speed and position regulating motor control system

Claim 1

FOR CONTROLLING AN ELECTRIC MOTOR, IN COMBINATION, MEANS FOR GENERATING REFERENCE PULSES AT A PREDETERMINED FREQUENCY, MEANS FOR SUPPLYING PULSES AT A FREQUENCY WHICH VARIES WITH THE SPEED OF SAID MOTOR, A FIRST COUNTER SUBJECTED TO SAID REFERENCE PULSES TO PROVIDE FIRST OUTPUT PULSES OF A DURATION IN ACCORDANCE WITH THE PERIOF REQUIRED TO REGISTER A GIVEN NUMBER OF SAID REFERENCE PULSES, A SECOND COUNTER RESPONSIVE TO THE PULSES WHICH VARY IN FREQUENCY WITH THE SPEED OF SAID MOTOR TO PROVIDE SECOND OUTPUT PULSES OF A DURATION IN ACCORDANCE WITH THE PERIOD REQUIRED TO REGISTER AN EQUAL NUMBER OF PULSES. MEANS RESPONSIVE TO SAID FIRST AND SECOND COUNTER OUTPUT PULSES TO PROVIDE ALTERNATIVELY FIRST PHASE CONTROL PULSES OF CONSTANT MAGNITUDE AND WITH DURATIONS VARYING IN ACCORDANCE WITH THE PHASE LEAD BETWEEN SAID FIRST AND SECOND OUTPUT PULSES, SECOND PHASE CONTROL PULSES OF CONSTANT MAGNITUDE AND WITH DURATIONS VARYING IN ACCORDANCE WITH THE PHASE DISPLACEMENT BETWEEN SAID FIRST AND SECOND PHASE AND NO PHASE CONTROL PULSES WHEN THE FIRST AND SECOND COUNTER OUTPUT PULSES ARE IN PHASE, MEANS SUBJECTED TO SAID FIRST AND SECOND PHASE CONTROL PULSES TO PROVIDE AN ANALOG CONTROL SIGNAL WHICH VARIES AS A FUNCTION OF THE PHASE DISPLACEMENT BETWEEN SAID FIRST AND SECOND PHASE CONTROL PULSES WITH RESPECT TO TIME, AND MEANS UNDER THE DIRECTION OF SAID ANALOG CONTROL SIGNAL FOR VARYING THE ENERGY SUPPLIED TO SAID MOTOR IN ACCORDANCE WITH ITS MAGNITUDE.