Pulleys 2 and 3 are of equal diameter, as are pulleys 4 and 5. Link 1, designed as a bent lever, is connected by turning pairs C, D and E to pulleys 2, 4, 3 and 5. Flexible link 6 runs over pulleys 2 and 3 and oscillates about fixed axis A. Flexible link 7 runs over pulleys 4 and 5 and oscillates about fixed axis B. When flexible link 6 turns about axis A, pulleys 2, 3, 4 and 5 roll along flexible links 6 and 7, imparting a complex motion to link 1.
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