Pulleys 5 and 6 are of equal diameter, as are pulleys 4 and 8. Link 1, designed as a bent lever, turns about fixed axis A and is connected by turning pairs B and E to pulley 5 and to flexible link 7. Flexible link 2 runs over pulleys 5 and 6 and is connected by turning pair C to link 3. Pulley 6 is rigidly attached to the base. Link 3 is connected by turning pairs D and C to pulleys 4 and 8. Flexible link 7 runs over pulleys 4 and 8. When link 1 turns about axis A, links 4 and 8 rotate about axes D and C, imparting a complex motion to link 3.
$2104$FL,Sa$