The lengths of the links of four-bar linkage ABCD comply with the conditions: B͞C=1.4A͞B, B͞E= 2.4A͞B, D͞C= 2.6A͞B, A͞D=3.4A͞B and A͞F=2A͞B. When link 1 turns about fixed axis A, point E of link 2 describes a path of which a cer tain portion approximates straight line q-q, passing through point F.
$665$LW,GI$