Link 1, designed as a bent lever, turns about fixed axis A and is connected by turning pairs D and E to pulleys 2 and 3, of equal diameter. Flexible link 7 runs over the pulleys and is connected by turning pairs F and G to links 6 and 4. Link 4 turns about fixed axis B. Link 5 turns about fixed axis C and is connected by turning pair H to link 6. When link 1 turns about axis A, link 6 has a complex motion and links 4 and 5 oscillate about axes B and C.
$2050$FL,Sa$