The lengths of the links comply with the conditions: A͞D=B͞C and A͞B=D͞C. Rotation is transmitted between two offset shafts A and D by a six fold repeated parallel-crank linkage ABCD. The linkage has rollers 1 rolling around in circular holes a, of a radius equal to the distance between axes A and D plus the roller radius. Shafts A and D have equal angular velocity.
$796$LW,C$