| 摘要 |
A single powered small diameter sprocket wheel is provided and meshed with large diameter driven rings or wheels journaled for rotation about generally parallel axes and provided with circumferentially spaced generally radial outer peripheral rollers in a first form of the invention wherein the single drive sprocket is disposed between the driven rings or wheels and journaled for rotation about an axis extending generally radially of the axes of rotation of the driven rings or wheels. In a second form of the invention a single driven shaft is provided and drives a pair of coaxial sprocket wheels equipped with intermediate shafts and the latter are drivingly engaged with circumferentially spaced rollers journaled from the outer peripheral portions of driven rings or wheels, the rollers journaled from the driven rings being journaled for rotation about axes generally paralleling the axes of rotation of the driven rings. |
