Link 4, designed as a bent lever, turns about fixed axis B and is connected by turning pairs C and D to pulleys 2 and 3, of equal diameter. Flexible link 7 runs over the pulleys and is connected by turning pairs E to links 1 and 6. Link 1 turns about fixed axis A. Link 5 tuns about axis B and is connected by turning pair F to link 6. When link 1 turns about axis A, link 6 has a complex motion and links 4 and 5 oscillate about axis B.
$2064$FL,Sa$