Cam 1 rotates about fixed axis A and consists of three equally spaced fingers d with semicircular tips. Follower 2 reciprocates in fixed guides B-B and its inner profile has two flat faces a. Pins d can contact only flat faces a. Surfaces b are designed to clear fingers d. In one cycle, follower 2 has three rises and three returns with long dwells at the extreme positions. The mechanism operates with impacts at the instants fingers d come into contact with faces a.
$2985$SmC,3L$