Link 1 slides in fixed guides a-a and has slot b whose axis is perpdeendicular to that of guides a-a. Link 3 slides in fixed guides c-c and has slot d whose axis is perpendicular to that of guides c-c. The axes of slots b and d are perpendicular to each other. Link 4 slides in fixed guides e-e whose axis is parallel to that of hguides a-a. Link 4 has pin f sliding along slot q of link 2 which turns about fixed axis 0. Pin 5 slides simultaneously along slots b, d and q of links 1, 3 and 2. When pin f is displaced by the amount x and link 3 by the amount y, the displacement z of link 1 is z=(1/k)xy where k is a constant dimension of the mechanism, being the distance from point 0 to the axis of guides e-e.
$1271$LG,MO$