Cam 1 rotates about fixed axis A and has two grooves, a and b. Follower 2 oscillates about fixed axis B and carries roller 5 which rolls and slides alternately along grooves a and b. A full cycle corresponds to two revolutions of cam 1. Roller 5 is switched over from one groove to the other by switching members 3 and 4 which turn about axes A and C. Members 3 and 4 are held against stop pins d and e by springs 6 and 7.
$3089$SmC,ML$