High ratio double action stepper unit

Claim 1

A HIGH REDUCTION ROTATION DRIVE MECHANISM ADAPTED TO CONVERT A PLURALITY OF INTERMITTENT DRIVING PULSES FROM INDEPENDENT SOURCES INTO MOVEMENT OF A SINGLE CONTROL MEMBER BY DIFFERENT INCREMENTAL AMOUNTS AND DIFFERENT DIRECTIONS FOR DIGITAL SUMMATION OF VALUES CORRESPONDING TO SAID DRIVING PULSES FROM THE RESPECTIVE INDEPENDENT SOURCES, COMPRISING, A PLURALITY OF INCREMENTAL DRIVE ASSEMBLIES EACH SELECTIVELY ADJUSTED FOR DISPLACEMENT BY A PRESET AMOUNT IN RESPONSE TO A DRIVING PULSE FROM AN ASSOCIATED SOURCE, POSITIVE DRIVE MEANS OPERATIVELY CONNECTED TO EACH OF SAID INCREMENTAL DRIVE ASSEMBLIES FOR MOVEMENT THEREOF AT A FIXED SPEED RATIO AND IN A SELECTED DIRECTION BY DIFFERENT AMOUNTS, AND MEANS DRIVINGLY CONNECTING SAID DRIVE MEANS TO THE CONTROL MEMBER FOR MOVEMENT THEREOF IN ONE OF SAID SELECTED DIRECTIONS AND BY ONE OF SAID DIFFERENT AMOUNTS DEPENDENT UPON THE SOURCE FROM WHICH THE DRIVING PULSE IS DERIVED.