Plate cam 1 rotates about fixed axis A. Follower 12 oscillates about fixed axis B and carries roller 13 which rolls along the contour of cam 1. Link 2 is connected by turning pair C to link 12 and, at its lower end, is acted on by spring 11 which holds roller 13 in contact with cam 1. Link 3 is connected by turning pairs D and E to links 2 and 5. Link 5 turns about fixed axis F and is subject to the tension of spring 10. Link 4 is connected by turning pairs E and K to link 5 and to link 6 which turns about fixed axis L. Slide 9 reciprocates vertically in fixed guides b-b. Link 7 is connected by turning pairs N and H to link 6 and to slide 9. Link 8 is connected by turning pair K to slide 9 and its slot e slides along pin M of link 5. Motion is transmitted from cam 1 through links 2 and 12, and further to links 5 and 6. When links 3 and 4 travel to the right, links 5 and 6 are turned, one clockwise and the other counterclockwise, so that links 8 and 7 pull slide 9 downward. Slide 9 is returned to its upper position by spring 10. Lug a of link 5 runs against fixed stop d to restrict the upward motion of slide 9.
$3282$CmL,FD$