Pulley for compound archery bow

作者: Joseph M. Caldwell

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摘要: An archer's compound shooting bow has rigging cables and pulleys arranged to eliminate torque on the limbs when is fully drawn permit an arrow fly true past approaches its rest condition. Each pulley two grooves receiving adjacent cable. The have variable separation at different locations along rim. mounted a limb alongside opposite cable dead end. As each limb, connection of end location tensions are arranged, in respect their magnitudes full draw, apply no net torsional moment about axis. between corresponding condition permits feathers pass without contact, which not draw. groove for string normal rotational other substantially helical first groove. ring-shaped fabricated from extrusion having annular cross section.