Pulleys 1 and 2 are of equal diameter. Pulley 1 rotates about fixed axis A and, through flexible link 5, rotates pulley 2 with extension a about fixed axis B. Link 3 is connected by turning pairs C and D to flexible link 5 and to link 4 which is connected, in turn, by turning pair E to extension a of pulley 2. When pulley 1 rotates about axis A , links 3 and 4 have complex motions.
$1890$FL,6L$