Flexible link 1 runs over pulleys 2 and 5, of equal diameter, and oscillates about fixed axis A. Link 3, designed as a bent lever, is connected by turning pairs C and D to pulleys 2 and 5 and by turning pair E to lever 4 which turns about fixed axis B. When flexible link 1 turns about axis A, link 3 has a complex motion and link 4 oscillates about axis B.
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