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