Variable differential gear drive automatic control apparatus for machines

Claim 1

APPARATUS FOR CONTROLLING THE RATE OF MOVEMENT OF A MOVABLE ELEMENT, COMPRISING IN COMBINATION: (A) A ROTATABLE DRIVE MEMBER HAVING AN INPUT RATE OF ROTATION, (B) A DRIVEN MEMBER HAVING AN OUTPUT RATE OF ROTATION FOR MOVING SAID MOVABLE ELEMENT, (C) MEANS FOR VARYING THE DRIVE IMPARTED BY SAID DRIVE MEMBER, (D) MEANS FOR TRANSMITTING SAID VARIABLE DRIVE TO SAID DRIVE MEMBER, (E) A MOVABLE PROGRAMMED TAPE, (F) MEANS FOR MOVING SAID TAPE, (G) FIRST MEANS OPERABLY CONNECTED TO SAID DRIVE MEMBER FOR OPERATING SAID TAPE MOVING MEANS AT A RATE PROPORTIONAL TO SAID INPUT RATE OF ROTATION, (H) SECOND MEANS OPERABLY CONNECTED TO SAID DRIVEN MEMBER FOR OPERATING SAID TAPE MOVING MEANS AT A RATE PROPORTIONAL TO SAID OUTPUT RATE OF ROTATION, (I) CONTROL MEANS CAPABLE OF PICKING UP SIGNALS FROM SAID TAPE AND SELECTIVELY RENDERING EITHER SAID FIRST MEANS OR SAID SECOND MEANS INEFFECTIVE WHEREBY ONLY ONE OF SAID FIRST MEANS INEFFECTIVE WHEREBY ONLY EFFECTIVE TO OPERATE SAID TAPE MOVING MEANS, AND (J) MEANS RESPONSIVE TO SIGNALS FROM SAID TAPE AND OPERABLY CONNECTED TO SAID DRIVE VARYING MEANS TO OPERATE SAID DRIVE VARYING MEANS IN RESPONSE TO SAID PROGRAMME TAPE.