Pulley 1 rotates about fixed axis C and, through flexible link 6, rotates pulleys 2 , 3 and 4 about fixed axes B, A and D. Pin a of flexible link 6 slides along slot b of slotted lever 5 which turns about fixed axis F. When pulley 1 rotates about axis C, lever 5 oscillates about axis F. The law of motion of slotted lever 5 per cycle of the mechanism can be varied by changing the diameters of pulleys 1, 2, 3 and 4 and the location of their axes of rotation.
$1891$FL,ML$