Adapter for reciprocal lever friction drive mechanism for unidirection drive

Claim 1

In an occupant propelled vehicle including a frame, a ground engaging wheel mounted on said frame, a driven sprocket for rotating said wheel, a drive sprocket, and an endless sprocket chain trained over said drive and driven sprockets, a drive shaft freely journaled concentric to said drive sprocket, a first lever arm disposed rotatable on one end of said shaft, a second lever arm disposed rotatable on the other end of said shaft; an attachment shaft journaled on said frame, a first cable having one end attached to the tip of one of said lever arms and the other end wound clockwise on said attachment shaft, and a second cable having one end attached to the tip of the other of said lever arm, and the othr end wound counterclockwise on said attachment shaft, and a turnbuckle with right-and-left threaded screws fitted to each of said cable whereby the cable length may be adjusted, and a compression spring mounted on said turnbuckle for moving into stopping engagement with said attachment shaft to limit the travel of said cables, and a leverage adding weight suspend from the tip of each of said lever arms by a link chain; and comprising a reciprocal lever friction drive mechanism for a man-powered vehicle, said mechanism consists of the first elements disposed keyed to both ends of the said drive shaft, each first element having cylindrical friction engagement means thereon; and a second element disposed contiguous and coaxial with each of the first element and rotatably relative thereto; a plurality of members connected to the second element adapted to frictionally engage and disengage the cylindrical friction engagement means and relative rotation of the second element in one direction causes engagement of the friction engagement, and opposite relative rotation causes disengagement of the friction engagement; and create a rotation of the drive shaft and simultaneously create a rotation of the sprocket wheel; characterized by the adaptability of the drive mechanism to a manpowered propelled vehicle by fitting the mechanism to each end of the common driving shaft on which transmission of power generated is effected.