Torque actuated reversible gear reduction assembly

Claim 1

A GEAR REDUCTION ASSEMBLY FOR COUPLING THE DRIVING SHAFT OF A REVERSIBLE MOTOR TO A SINGLE OUTPUT SHAFT WHEREBY SAID OUTPUT SHAFT MAY BE DRIVEN BY SAID MOTOR, SAID ASSEMBLY COMPRISING AN INPUT GEAR OPERATIVELY COUPLED TO THE DRIVE SHAFT AND ROTATABLE IN RESPONSE TO THE ROTATION OF SAID DRIVING SHAFT, AN OUTPUT GEAR COUPLED TO SAID OUTPUT SHAFT, A PAIR OF INTERMEDIATE GEARS IN ENGAGEMENT WITH SAID OUTPUT GEAR AND MEANS FOR DECOUPLING SAID DRIVING AND OUTPUT SHAFTS AT TIMES WHEN SAID MOTOR IS NOT RUNNING WHEREBY TO FACILITATE MANUAL CONTROL OF SAID OUTPUT SHAFT AT SUCH TIMES, SAID MEANS COMPRISING A PAIR OF COAXIAL MOVABLE GEARS HAVING DIFFERENT DIAMETERS, A SUBFRAME FOR MOUNTING SAID COAXIAL GEARS, SAID FRAME BEING PIVOTABLY MOUNTED ON AN AXIS REMOTE FROM THE AXIS OF THE INPUT GEAR FOR PROVIDING TRANSVERSE MOVEMENT THEREOF, THE FIRST OF SAID COAXIAL MOVABLE GEARS BEING IN ENGAGEMENT WITH SAID INPUT GEAR WHEREBY SAID COAXIAL MOVABLE GEARS CAN TRANSVERSE A PORTION OF THE CIRCUMFERENCE OF SAID INPUT GEAR, A PINION SUPPORTED WITHIN SAID ASSEMBLY AND FRICTIONALLY BIASED AGAINST ROTATION, SAID PINION BEING COUPLED TO THE FIRST OF SAID COAXIAL MOVABLE GEARS TO PERMIT SAID COAXIAL MOVABLE GEARS TO TRAVERSE SAID INPUT GEAR RESPONSIVE TO THE ROTATION OF SAID DRIVING SHAFT WHEREBY THE SECOND OF SID COAXIAL MOVABLE GEARS IS MOVED INTO ENGAGEMENT WITH ONE OF SAID INTERMEDIATE, GEARS DEPENDING UPON THE DIRECTION IN WHICH SAID DRIVING SHAFT IS ROTATING, AND SPRING MEANS BIASED BY THE MOVEMENT OF SAID COAXIAL MOVABLE GEARS FOR MOVING SAID SECOND COAXIAL GEAR OUT OF ENGAGEMENT WITH EITHER OF SAID INTERMEDIATE GEARS WHEN SAID MOTOR IS NOT RUNNING.