Pulleys 1 and 6 are of equal diameter. Pulley 1 rotates about fixed axis A and through flexible link 7, rotates pulley 6 about fixed axis B. Links 2, 3 and 5 are connected by turning pairs C, D and E to flexible link 7. Link 4 is connected by turning pairs G and H to links 3 and 5. Link 3 is connected by turning pair F to link 2. When pulley 1 rotates about axis A and points C, D and E are all travelling along a straight portion of their path, links 2, 3 and 5 have dwells with respect to flexible link 7. When point E passes over to a circular portion of its path, links 4 and 5 turn with respect to flexible link 7. When point D passes over to a circular portion of its path, links 3 and 2 turn with respect to flexible link 7.
$1921$FL,D$