Link 1, designed as a complex lever, turns about fixed axis A and is connected by turning pairs B, C and H to pulley 7 and to links 3 and 5. Flexible link 8 runs over pulleys 4 and 7, of equal diameter, and is connected by turning pairs E and F to links 2 and 6. Pulley 4 is rigidly attached to the base. Links 3 and 5 are connected by turning pairs D and G to links 2 and 6. When link 1 turns about axis A, links 2, 3, 5 and 6 have complex motions.
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