Cam 1 reciprocates in fixed guides A-A and has triangular groove abc. Follower 2 reciprocates in fixed guide B and carries roller 3 which rolls and slides along groove abc. When cam 1 reciprocates, groove abc acts on roller 3, reciprocating follower 2 in a direction perpendicular to the travel of cam 1 with a dwell while the roller passes along horizontal portion ac of the groove. Latch pins 4 and 5, actuated by springs 6 and 7, prevent the roller from reversing its direction of travel along the groove.
$3094$SmC,ML$