The lengths of the links comply with the conditions: C͞B=4.3A͞C, B͞D=5.85A͞C, B͞F=E͞G= 2.12A͞C, E͞D= 2.46A͞C, G͞F=8A͞C and A͞G=A͞F=4.45A͞C. When point C of crank 1 travels along the part of the circle indicated by a heavy continuous line, point D of connecting rod 2 describes a path of which the portion shown by a heavy continuous line approximates a circular arc of radius E͞D with its centre at point E. In continuous rotation of crank 7, link 3 oscillates about fixed axis G with a dwell during the time that point D travels along the portion of its path indicated by the heavy continuous line.
$746$LW,D$