The lengths of the links of link-gear mechanism ABC comply with the conditions: A͞C=1.5A͞B and B͞D=5.3A͞B. When crank 1 turns about fixed axis A, point D of link 2 describes a path of which a certain portion approximates straight line q-q which is perpendicular to the line of centres AC.
$1360$LG,GI$