Flexible link 1 runs over pulleys 2 and 3, of equal diameter, and oscillates about fixed axis A. Link 4, designed as a bent lever, is connected by turning pairs C and D to pulleys 2 and 3. Link 7, designed as a bent lever, turns about fixed axis B and is connected by turning pairs F and G to links 4 and 6. Link 5 is connected by turning pairs D and E to links 4 and 6. When flexible link 1 turns about axis A, links 4, 5 and 6 have complex motions and link 7 oscillates about axis B.
$1996$FL,TC$