(under subclass 1) Subject matter wherein said means to change the rotational velocity are actuated by hydraulic or pneumatic energy. [figure] [caption] An accessory
drive mechanism having a continuously variable output/input speed ratio including a housing containing a predetermined volume of fluid, input means, output means, a drive pulley operatively connected to the input means, an input race member having a toroidal surface formed thereon and mounted for rotation with the input means, an output race member having a toroidal surface formed thereon oppositely disposed from the first-mentioned toroidal surface, a plurality of rollers frictionally engaging the oppositely disposed toroidal surfaces, drive means formed on the output means for driving engine accessories, and an "internal sensing" ratio control means including a nonrotating pivot tube means for sensing changes in fluid force reflecting changes in input speed and including a piston-actuating mechanism for inclining the rollers, effectuating roller tilt along the toroidal surfaces to change the output/input speed ratio in response to the changes in fluid force communicated thereto by the pivot tube means.
