Pulleys 1 and 4 are of equal diameter. Pulley 1 rotates about fixed axis A and, through flexible link 7, rotates pulley 4 about fixed axis B. Links 2 and 6 turn about fixed axes C and D and are connected by turning pairs E and F to links 3 and 5 which are connected together and to flexible link 7 by turning pairs G. When pulley 1 rotates about axis A, links 3 and 5 have complex motions and links 2 and 6 oscillate about axes C and D.
$1902$FL,ML$