Link 3, designed as a bent lever, turns about fixed axis B and is connected by turning pairs G and F to pulleys 2 and 5, of equal diameter. Flexible link 7 runs over the pulleys and is connected by turning pair D to link 6. Link 6, designed as a bent lever, is connected by turning pairs C and E to links 1 and 4 which turn about fixed axes A and B. When link 1 turns about axis A, link 6 has a complex motion and links 4 and 3 oscillate about axis B.
$2087$FL,Sa$