Cylinder cam 1 rotates about fixed axis A and has groove a whose projection on the plane of the drawing has a figure-of- eight shape. Follower 2 reciprocates in fixed guide D and carries pivoted lens-shaped member 3 which slides along groove a. Follower 2 may have various types of motion depending upon the profile of groove a. Axis B of follower travel is parallel to axis A.
$3040$SmC,3L$