Woodard, Weikart, Emhardt & Naughton
Infinitely variable ratio transmission apparatus
 A variable ratio transmission apparatus for converting an input torque at a first RPM to an output torque at a second RPM includes a pair of driving discs disposed on an input drive shaft and in spaced parallel relationship thereto, a pair of driven discs disposed on an output drive shaft and a continuous length of metal link chain extending around and in direct contact with each pair of discs so as to create a high frictional force at the discs and chain interface sufficient to transmit motion from the driving discs to the driven discs. The link chain is arranged as a continuously repeating pattern of link plates which are interconnected by pins and a plurality of U-shaped drive members assembled relative to the link plates and pins. The outwardly facing surfaces of each drive member are contoured so as to conform to the surface shape of the driving and driven discs such that the chain is able to move in and out according to disc spacing, thereby realizing different radii. Each drive member includes a pin-receiving groove and each is arranged to be slidably removed when a right-angle bend is placed in the chain. 
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inventional inventional
George E.
Moore