Control system

Claim 1

IN A CONTROL SYSTEM FOR MOVING A MEMBER IN ACCORDANCE WITH NUMERICAL INPUT DATA, MEANS AT EACH DESIRED POSITION OF SAID MEMBER FOR PRODUCING A UNIQUE PATTERN REPRESENTING A PLURAL DIGIT POSITION NUMBER, EACH OF SAID PLURAL DIGIT POSITION NUMBERS DIFFERING FROM THE NUMBER AT THE ADJACENT POSITION BY ONLY ONE DIGIT, MEANS RESPONSIVE TO NUMERICAL INPUT DATA FOR PRODUCING A PLURALITY OF ELECTRICAL SIGNALS CORRESPONDING TO THE RESPECTIVE DIGITS OF A PLURAL DIGIT COMMAND NUMBER REPRESENTING THE POSITION TO WHICH SAID MEMBER IS TO BE MOVED, A PLURALITY OF SENSING DEVICES ONE FOR EACH DIGIT OF SAID PLURAL DIGIT POSITION NUMBER AND MOVABLE AS A UNIT IN RELATION TO SAID PATTERN IN ACCORDANCE WITH MOVEMENT OF SAID MEMBER, GATE CIRCUIT MEANS FOR INDIVIDUALLY COMPARING THE OUTPUT OF SAID SENSING DEVICES WITH DIFFERENT ONES OF SAID ELECTRICAL SIGNALS CORRESPONDING TO DIFFERENT DIGITS OF SAID COMMON NUMBER AND DEVELOPING SIGNALS REPRESENTING ANTICOINCIDENCE TO EACH DIGIT OF SAID COMMAND NUMBER WITH THE CORRESPONDING DIGIT OF SAID POSITION NUMBER, MEANS FOR DEVELOPING A DIRECTION SIGNAL IN RESPONSE TO SAID GATE CIRCUIT MEANS ASSOCIATED WITH THE HIGHEST ORDER DIFFERENCE IN SAID COMMAND AND POSITION NUMBERS, MEANS FOR MODIFYING THE SIGN OF SAID DIRECTION SIGNAL IN ACCORDANCE WITH THE NUMBER OF COINCIDENCE SIGNALS SIMULTANEOUSLY PRODUCED IN DIGITS OF HIGHER ORDER THAN SAID HIGHEST ORDER DIFFERENCE, AND MEANS FOR MOVING SAID MEMBER IN A DIRECTION CORRESPONDING TO SAID MODIFIED DIRECTION SIGNAL.