Link 1 rotates about fixed axis A and is connected by turning pair B to pulley 6. Flexible link 8 runs over pulleys 4 and 6. Pulley 4 is rigidly attached to the base. Flexible link 7 runs over pulleys 2 and 5 which rotate about axes B and A. Link 3 is connected by turning pairs C and D to flexible links 7 and 8. When link 1 rotates about axis A, pulleys 2 and 5 rotate about axes B and A, imparting a complex motion to link 3.
$2100$FL,Sa$