The lengths of the links comply with the conditions: B͞C=2.52A͞B, DC=1.44A͞B, B͞E=4.44A͞B, C͞E=4.23A͞B, E͞F=8.45A͞B, G͞F=2.52A͞B, A͞D=2.35A͞B, A͞G=2.77A͞B and D͞G=2.48A͞B. When point B of crank 1 travels along the portions of the circle indicated by heavy continuous lines, point E of connecting rod 2 describes a path of which the portions shown by heavy continuous lines approximate circular arcs of radius F͞E with centres at points F and F₁. When crank 1 rotates, link 3 oscillates about fixed axis G and has two dwells when point E is on the portions of its path indicated by heavy continuous lines.
$753$LW,D$