Plate cam 1 rotates about fixed axis A. Follower 7 turns about fixed axis B and carries roller 9 which rolls along the contour of cam 1. Link 8 is connected by turning pairs D and E to follower 7 and to lever 11 which turns about fixed axis C. Pawl 2 turns about axis G of lever 11 and engages the teeth of ratchet wheel 3 which rotates freely about axis C. Plate cam 4 is rigidly attached to wheel 3. Follower 6 reciprocates in fixed guide F and carries roller 5 which rolls along the contour of cam 4. When cam 1 rotates continuously, follower 6 has a complex intermittent motion which depends on the shapes of cams 1 and 4, and the dimensions of the other links. Rollers 9 and 5 are held in contact with cams 1 and 4 by springs 10 and 12.
$3342$CR,ML$