Pulleys 1 and 3 are of equal diameter. Pulley 1 rotates about fixed axis A and, through flexible link 7, rotates pulley 3 about fixed axis B. Link 5, designed as a bent lever, is connected by turning pairs G and H to links 2 and 4 which turn about fixed axes C and D. Link 6 is connected by turning pairs E and F to flexible link 7 and to link 5. When pulley 1 rotates about axis A, links 5 and 6 have complex motions and links 2 and 4 oscillate about axes C and D.
$1913$FL,ML$