Discrete signal electrical positioning control system

Claim 1

A MACHINE CONTROL, COMPRISING: A PAIR OF RELATIVELY MOVABLE MEMBERS; SERVO MEANS COUPLED TO SAID MEMBERS TO RELATIVELY MOVE SAID MEMBERS; A DISCRETE SIGNAL PROGRAM DEVICE; INCREMENTAL POSITION TRANSDUCER MEANS COUPLED TO AND OPERATED BY SAID MEMBERS; COUNT PULSE PRODUCING MEANS COUPLED TO SAID POSITION TRANSDUCER MEANS AND CONTROLLED THEREBY; NORMALLY INACTIVE, ZERO TRANSDUCER MEANS COUPLED TO SAID MEMBERS AT DISPLACED POINTS ALONG THE PATH OF RELATIVE MOVEMENT OF SAID MEMBERS; ZERO TRANSDUCER SELECTOR MEANS COUPLED TO AND RESPONSIVE TO SAID PROGRAM DEVICE AND HAVING AN OUTPUT COUPLED TO SAID ZERO TRANSDUCER MEANS FOR RENDERING SAID ZERO TRANSDUCER MEANS ACTIVE AT A SELECTED POINT ALONG SAID PATH OF RELATIVE MOVEMENT; CONTROL MEANS COUPLED TO AND CONTROLLED BY SAID ZERO TRANSDUCER MEANS AND HAVING AN OUTPUT COUPLED TO SAID COUNT PULSE PRODUCING MEANS FOR INHIBITING COUNT PULSE PRODUCTION UNTIL SAID MEMBERS OCCUPY RELATIVE POSITIONS AT SAID SELECTED POINTS; AND CIRCUIT MEANS COUPLED TO SAID PROGRAM DEVICE AND SAID COUNT PULSE PRODUCING MENS AND RESPONSIVE THERETO AND HAVING AN OUTPUT COUPLED TO SAID SERVO MEANS.