Multiple free wheel for a bicycle

Claim 1

A multi-speed transmission free wheel for use on a bicycle in combination with a gear-shifting system, comprising a driven member to be secured to a hub means mounted on a bicycle rear wheel, a cylindrical driving means concentrically disposed about and spaced regularly from the outer periphery of said driven member, means disposed in the space between said driven member and said driving member for transmitting the driving force from said driving member to said driven member in one direction only, and a plurality of sprocket wheels mounted on and extending outwardly from said driving member for driving the rear wheel at different rates of speed through the medium of a driving chain which is selectively positionable on said sprocket wheels by the gear-shifting system, each of said sprocket wheels having a different diameter with said sprocket wheel for the highest speed having the smallest diameter and said sprocket wheel for the lowest speed having the largest diameter, said sprocket wheels are regularly spaced a part, said sprocket wheels having dents cut in the outer periphery at regularly spaced intervals in relationship to the pitch dimensions of the driving chain, and at least said sprocket wheel for lowest speed operation which has a greater number of dents tHan said sprockets wheels for higher speed operation having alternate dents at least partially cut off inwardly from the outer circumferential periphery of the tips of adjacent dents on the same said sprocket wheel.