Cam 1 rotates about fixed axis A and its contour consists of eight profiled lobes a composed of tangent circular arcs. Follower 2 oscillates about fixed axis B and carries roller 3 which rolls along lobes a of cam 1. When cam 1 rotates counterclock-wise, follower 2 makes eight oscillating motions per cycle (per revolution of cam 1) with instantaneous dwells when roller 3 contacts recesses b. Follower 2 locks the mechanism
when cam 1 begins to rotate clockwise. Roller 3 is held in contact with cam 1 by spring 4.
$3016$SmC,3L$