Pulleys 1 and 3 are of equal diameter. Pulley 1 rotates about fixed axis B and, through flexible link 2, rotates pulley 3 about fixed axis A. Pin a of flexible link 2 slides along slot b-b of slider 4 which moves in fixed guides p-p. When pulley 1 rotates about axis B, slider 4 reciprocates in guides p-p. If line AB is parallel to the axes of guides p-p and pulley 1 rotates at constant angular velocity ω₁, then, when pin a travels along portions dl and fg of its path, slider 4 travels with a constant velocity equal to v=ω₁r₁, where r₁ is the radius of pulley 1.
$1865$FL,5L$