Variable speed positive gear transmission

摘要

A flat disc is provided with pie-shaped segments of gear teeth running from the periphery towards the center of the disc in parallel relationship separated by blank segments on the face of the disc. First and second pinion gears are positioned over the face and coupled for movement towards and away from the center of the disc simultaneously along splined shafts. The geometry is such that when one of the pinion gears is in meshing engagement with a toothed segment, the other pinion gear is positioned over a blank segment. The pinion gears are thus alternately driven by the toothed segments and a change in speed ratio between the rotating disc and pinion gear shafts is effected by varying the radial distance of the pinion gears from the center of the disc.