Links 1 and 2 slide in fixed guides p-p and q-q whose axes are parallel to each other. Link 3 turns about fixed axis A and has slot d. Pins b and c of links 1 and 2 slide along slot d. The mechanism is intended for the mathematical operation xy=a², where x is the displacement of link 1, y is the displacement of link 2 and a is a constant dimension of the mechanism.
$1272$LG,MO$