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 3 and 5 turn about fixed axis D and are connected by turning pairs E and F to links 2 and 6 which are connected together and to flexible link 7 by turning pairs C. When pulley 1 rotates about axis A, links 2 and 6 have complex motions and links 3 and 5 oscillate about axis D.
$1905$FL,ML$