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