Link 1, designed as a bent lever, turns about fixed axis A and is connected by turning pairs D and C to pulleys 2 and 3, of equal diameter, and to link 6. Flexible link 7 runs over the pulleys and is connected by turning pair F to link 4 which turns about fixed axis B. Link 5 turns about axis B and is connected by turning pair E 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.
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