VARIABLE TRANSMISSION DRIVE PULLEY ASSEMBLY WITH SELECTIVE DRIVE AND INCLUDING RATCHET MECHANISM

摘要

Disclosed herein is a variable transmission drive pulley assembly comprising a fixed sheave connected to a drive shaft for common rotation therewith, a movable sheave carried by the drive shaft for movement axially thereof relative to a retracted position spaced from the fixed sheave, a spring urging the movable sheave toward the retracted position in the direction away from the fixed sheave, speed responsive fly weights for displacing the movable sheave toward the fixed sheave, a second spring for augmenting the effectiveness of the speed responsive fly weights and a selectively operable control including a ratchet mechanism for regulating operation of the second spring independently of the rate of drive shaft rotations.