Face cam 1 rotates about fixed axis A and has profiled groove a along which roller 8 of follower 2 rolls and slides. Follower 2 has straight slot b which reciprocates along slider 7. Slider 7 turns about axis A. Rocker arm 3 oscillates about fixed axis B and is connected by turning pairs C and D to follower 2 and to link 4. Lever 5 turns about fixed axis P and is connected by turning pair E to shaped member 6 which, in turn, is connected by a turning member to link 4. Member 6 has arm f which engages the workpiece and transfers it from station c to station e when link 4 travels to the right. When link 4 travels to the left, it first turns member 6 counterclockwise about axis E so that arm f passes under the next workpiece at station c. To ensure that link 4 first turns member 6 in its motion in both directions, lever 5 is retarded by a friction drag (not shown).
$3251$CmL,SF$