When pulley 1 rotates about fixed axis A, rotation is transmitted to pulley 2 about fixed axis B through two tapered disks 3 and 4 which are pressed by spring 5 and two spherical washers 6 against two identical disks keyed on the shafts of pulleys 1 and 2. Tapered disks 3 and 4 are mounted with a certain clearance on axle 10 so that they rot at e freely and can be tilted on the axle. Axle 10 is mounted in lever 7 which turns about fixed axis C. When lever 7 is turned, the distances between the axis of tapered disks 3 and 4 and axes A and B vary, thereby providing for stepless variation of the transmission ratio from pulley 1 to pulley 2.
$3475$CF,IV$