MAIN-AND-RETURN CAM-LEVER MECHANISM

Cam 1 rotates about fixed axis B and has two contours, a and b. Follower 2 oscillates about fixed axis C and carries two rollers, 5 and 6, which roll a long the contours of cam 1: roller 5 along contour b and roller 6 along contour a. Follower 2 is connected by turning pair D to slider 3 which reciprocates along slot d of link 4. Link 4 oscillates about fixed axis A. Positive motion is achieved be…