Link 1 is designed as collar c encircling fixed disk d. Slider 3 rotates about fixed axis C. Link 2 reciprocates in guides e. Link 2 is connected by turning pair D to slider 4 which moves along slot f of link 5. Link 5 reciprocates in fixed guides g-g. The displacement of link 5 from its extreme left or right position s=a(1-• s i n(α) )+(b/2)sin(2α) where α is the angle of rotation of link 2 measured from the vertical axis. The ratio of the maximum velocities of the forward to the return stroke is k=(a-b)/(a+b) Point D of the mechanism describes a conchoid of a circle.
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