Automatic machine-tool control system for truing mechanical parts

Claim 1

IN AN AUTOMATIC MACHINE FOR BALANCING MECHANICAL PARTS WITH RESPECT TO A GIVEN ROTATION AXIS BY REMOVING MATERIAL FROM PREDETERMINED PORTIONS OF SAID PARTS, AN ELECTRICAL CONTROL SYSTEM COMPRISING TEST MEANS FOR TRANSLATING THE UNBALANCE OF SAID PARTS INTO A PLURALITY OF ELECTRIC VOLTAGES, ELECTRIC CIRCUIT MEANS FOR DERIVING FROM SAID VOLTAGES ANALOGUE VOLTAGES, THE AMPLITUDE OF EACH ONE OF WHICH IS PROPORTIONAL TO THE QUANTITY OF MATERIAL TO BE REMOVED FROM ONE CORRESPONDING OF SAID PREDETERMINED PORTIONS, CODING MEANS FOR TRANSLATING EACH SAID AMPLITUDE INTO A GROUP OF CODED DIGITAL DATA REPRESENTING A BINARY NUMBER ACCORDING TO A PREDETERMINED NON-LINEAR RELATIONSHIP BETWEEN SAID AMPLITUDE AND NUMBER, MEANS FOR STORING SAID GROUP OF CODED DIGITAL DATA AND MEANS FOR CAUSING SAID STORED GROUP OF CODED DIGITAL DATA TO CONTROL THE INFEED OF AT LEAST ONE CORRESPONDING TOOL PROPORTIONALLY TO SAID BINARY NUMBER INTO ONE OF SAID PORTIONS, WHEREIN SAID CODING MEANS COMPRISES SERVOMECHANISM MEANS FOR CONTROLLING THE DISPLACEMENT OF A FIRST MOVABLE MEMBER WITH RESPECT TO A REFERENCE POSITION, A CODER INCLUDING A SECOND MOVABLE MEMBER, THE POSITIO OF WHICH CONTROLS A PLURALITY OF ELECTRIC CURRENTS EACH HAVING ONE OR THE OTHER OF TWO POSSIBLE INTENSITY VALUES, SAID CURRENTS CONSTITUTING SAID GROUP OF CODED DIGITAL DATA, AND A MECHANICAL LINKAGE BETWEEN SAID FIRST AND SECOND MOVABLE MEMBERS SO ARRANGED AS TO ENSURE SAID PREDETERMINED NON-LINEAR RELATIONSHIP BETWEEN THE RESPECTIVE DISPLACEMENTS OF SAID MEMBERS.