Pulleys 1 and 2 are of equal diameter, as are pulleys 4 and 5. Pulley 1 rotates about fixed axis A and, throug flexible link 7, rotates pulley 2 about fixed axis B. Link 3 is connected by turning pairs E and F to flexible links 7 and 6. Flexible link 6 runs over pulleys 4 and 5 which rotate about fixed axes C and D. When pulley 1 rotates about axis A, pulleys 4 and 5 rotate about axes C and D, imparting complex motion to link 3.
$1918$FL,ML$