Flexible link 7 runs over pulleys 2 and 4, of equal diameter, and oscillates about fixed axis B. Link 3, designed as a complex lever, is connected by turning pairs G and F to pulleys 2 and 4 and by turning pairs D and C to links 6 and 1. Links 1 and 5 turn about fixed axis A. Links 5 and 6 are connected together by turning pair E. When link 1 turns about axis A, links 3 an 6 have complex motions and link 5 and flexible link 7 oscillate about axes A and B.
$1991$FL,TC$