Link 3, designed as a complex lever, is connected by turning pairs F, E, C and D to pulleys 2 and 5, of equal diameter, and to links 6 and 4. Flexible link 7 runs over the pulleys and is connected by turning pair G to link 1 which turns about fixed axis A. Links 6 and 4 turn about fixed axes B and A. When link 1 turns about axis A, link 3 has a complex motion and links 4 and 6 oscillate about axes A and B.
$2033$FL,Sa$