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WATT FOUR-BAR APPROXIMATE STRAIGHT-LINE MECHANISM

The lengths of the links of four-bar linkage ABCD comply with the conditions: A͞D=1.84A͞B, B͞E=0.76A͞B, B͞C=1.03A͞B, E͞C=0.55A͞B and D͞C=0.52A͞B. When link 1 turns about fixed axis A, point E of link 2 describes a path of which portion q-q is approximately a straight line.
$650$LW,GI$