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