Link 2, designed as a bent lever, is connected by turning pairs F, G and H to pulleys 6 and 5, of equal diameter, and to link 3. Flexible link 7 runs over the pulleys and is connected by turning pairs D and E to links 4 and 1. Link 1 turns about fixed axis A. Link 3, designed as a bent lever, turns about fixed axis B and is connected by turning pair C to link 4. When link 1 turns about axis A, links 2 and 4 have complex motions and link 3 oscillates about axis B.
$2049$FL,Sa$