A. an input crankshaft comprised of an input shaft which rotates on a first axis and an input throw shalt which orbits around said first axis;

B. a first member, attached to said input throw shaft so as to be free to rotate on said input throw shaft in the opposite angular direction of said input throw shaft orbit, at variable angular velocities, for creating variable movement;

C. a second shaft, the cylindrical length axis of which is offset from, and parallel to, said first axis;

D. two orbital crankshafts, each comprised of at least one orbital throw shaft, each said orbital throw shaft is free to orbit around an axis which is diametrically opposed to the other relative to said second shaft or to orbit around said second shaft at variable angular velocities, both orbital movements being in the angular direction of said input throw shaft orbit;

E. at least one carrier member attached to said second shaft so as to be free to rotate on said second shaft in the angular direction of said input throw shaft orbit, for supporting said orbital crankshafts on said second shaft;

F. two connecting members, each said connecting member is attached to said first member at an axis which is diametrically opposed to the other relative to said input throw shaft, and each said connecting member is connected to at least one said orbital throw shaft so as to transmit torque and reaction between said first member and said orbital throw shafts;

G. at least one planetary gear connected to said orbital throw shafts so as to be driven by said variable movements;

H. at least one ring gear of greater diameter than said planetary gear, for receiving torque from said planetary gear.