The lengths of the links comply with the conditions: F͞E=1.25B͞F, D͞E=1.13B͞F, E͞H=0.85B͞F, H͞F=0.65B͞F, C͞H=0.81B͞F, G͞C=1.56B͞F, B͞D=0.58B͞F, B͞G=1.85B͞F and G͞D=1.6B͞F. Link 4 is connected by turning pair A to connecting rod 2 of four-bar drag-link linkage BFED, and by turning pair C to link 5 which turns about fixed axis G. Crank 1 is designed as a collar that encircles fixed round disk 6 having its centre at point B. Point A of connecting rod 2 describes connecting-rod curve a-a which has double point H. When crank 1 rotates, link 5 has a short dwell at the moment that point A of connecting rod 2 coincides with double point H of its path.
$752$LW,D$