Pulley 1 has extension a with which it turns about fixed axis A. Link 4 is connected by turning pairs C and D to pulleys 1 and 2, of equal diameter. Flexible link 5 runs over pulleys 1 and 2 and is connected by turning pair E to link 3 which turns about fixed axis B. When pulley 1 turns about axis A, link 3 oscillates about axis B.
$1879$FL,6L$