Cylinder cam 1 rotates about fixed axis A-A and is rigidly attached to (or integral with) slanted washer a which is the cam ridge. Follower 2 reciprocates in fixed guides B-B whose axis D-D is parallel to axis A-A. Follower 2 carries two barrel-shaped rollers 3 which roll along the upper and lower side surfaces of slanted washer a. Positive motion is achieved because the side surfaces of washer a arc parallel and the vertical distance between their theoretical, or pitch, curves is equal to the distance between the centres of rollers 3. When cam 1 rotates at constant speed, follower 2 travels at constant velocity. The full stroke and velocity of follower 2 depend upon the angle of inclination of the surfaces of washer a to axis A-A.
$3037$SmC,3L$