Cam-plate 1 rotates about fixed axis A and has four lobe members a with circular slots d whose axes are circular arcs described from centres C, D, E and F. Follower 2 reciprocates in fixed guide B and carries a roller which rolls along the working surfaces of lobe members a. Members a can be clamped in various positions with respect to cam-plate 1 by nuts b. Thus, in a single revolution of cam-plate 1, follower 2 may have the same or four different types of motion with different strokes.
$3134$SmC,LL$