The lengths of the links of slider-crank linkage ABC comply with the conditions: B͞C=1.52A͞B, D͞C=3.7A͞B, D͞B=2.26A͞B and a=0.61A͞B. When crank 1 turns about fixed axis A, point D of connecting rod 2 describes a path of which a certain portion approximates straight line q-q, perpendicular to axis b-b of motion of slider 3.
$1548$SC,GI$