Pulley 1 rotates about fixed axis E and, through flexible link 4, rotates pulleys 2 and 3 about fixed axes D and A. Pin a of flexible link 4 slides along slot b of slotted lever 5 which turns about fixed axis B. When pulley 1 rotates about axis E, lever 5 oscillates about axis B. The law of motion of slotted lever 5 per cycle of the mechanism can be varied by changing the diameters of pulleys 1, 2 and 3 and the location of their axes of rotation.
$1886$FL,6L$