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