The lengths of the links comply with the conditions: B͞C=3.75A͞B, B͞E=1.5A͞B, E͞F=2.12A͞B, G͞F=2.8A͞B, G͞D=6.65A͞B and G͞A=A͞D=4A͞B. Link 4 is connected by turning pairs E and F to connecting rod 2 of four-bar linkage ABCD and to link 3 which oscillates about fixed axis G. When point B of crank 1 travels along the part of the circle indicated by a heavy continuous line, point E of connecting rod 2 describes a path of which portion a-a approximates a circular arc with its centre at point F. During this period link 3 almost ceases to oscillate, i.e. it practically has a dwell.
$749$LW,D$