Pulleys 1, 2 and 4 are of equal diameter. Pulley 1 rotates about fixed axis A and, through flexible link 7, rotates pulley 2 about fixed axis B. Flexible link 7 is connected by turning pair C to pulley 5. Link 3 is connected by turning pairs C ana D to pulleys 5 and 4. Flexible link 6 runs over pulleys 4 and 5 and turns about axis A. When pulley 1 rotates about axis A, pulleys 5 and 4 rotate about axes C and D, imparting a complex motion to link 3.
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