Pulleys 1 and 7 are of equal diameter. Pulley 1 rotates about fixed axis A and, through flexible link 2, rotates pulley 7 about fixed axis B. Links 4 and 6 turn about fixed axes E and F and are connected by turning pairs C and D to links 3 and 5. Link 3 is connected by turning pair G to flexible link 2. When pulley 1 rotates about axis A, links 3 and 5 have complex motions and links 4 and 6 oscillate about axes E and F.
$1917$FL,ML$