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, 4 and 5 are connected by turning pairs D, C and E to flexible link 7. Links 2 and 3 are connected together by turning pair F, and links 4 and 5 by turning pair G. When pulley 1 rotates about axis A and points D, C and E are all travelling along a straight portion of their path, links 2, 3, 4 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 C passes over to a circular portion of its path, links 2 and 3 turn with respect to flexible link 7.
$1923$FL,D$