Gear 1 rotates about fixed axis A and meshes with gear 2 which rotates about fixed axis B. Rigidly attached to gear 2 is plate cam 4. Driven connecting rod 3 is connected by turning pair C to gear 1 and its lower surface contacts contour a of cam 4. When gear 1 rotates, points of connecting rod 3 describe complex connecting-rod curves whose shape depends upon the dimensions of the links, their location with respect to one another, and to the profile of cam 4. Connecting rod 3 is held in contact with cam 4 by spring 5.
$3324$GrC,Ge$