Driving method and apparatus

An apparatus for driving an output shaft in the normal direction and the reverse direction alternately, which comprises a partially toothed wheel C connected to the output shaft, a normal direction-driven, partially toothed wheel A which is engaged with said partially toothed wheel C and driven and rotated in one direction and a reverse direction-driven, partially toothed wheel B which is engaged with said partially toothed wheel C and driven and rotated in a direction reverse to the rotation direction of said partially toothed wheel A, said partially toothed wheels A, B and C being disposed in such a relationship that said partially toothed wheel C is engaged alternately with said partially toothed wheel A and with said partially toothed wheel B, wherein a cam follower is fixed to the output shaft and first and second cams (b) and (a) are mounted, each of which is driven and rotated at a certain speed and is capable of being engaged with said cam follower, said cam follower and said first and second cams 8b) and (a) being disposed in such a relationship that the time of termination of the normal rotation of the output shaft by said normal direction-driven, partially toothed wheel A, the cam follower is engaged with a cam groove of said first can (b) to reduce the speed of the normal rotation of the output shaft, stop the output shaft and accelerate the output shaft to turn in the reverse direction, and at the time of termination of the reverse rotation of the output shaft by said reverse direction-driven, partially toothed wheel B, the cam follower is engaged with a cam groove of said second cam (a) to reduce the speed of the reverse rotation of the output shaft, stop the output shaft and accelerate the output shaft to turn in the normal direction.