The lengths of the links comply with the conditions: A͞B=G͞F=D͞C, B͞F=0.62A͞B, B͞E=E͞F, M͞E=M͞C, l₁=B͞E+E͞C, l₂=A͞B+F͞G and l₃=B͞F. Link 1 turns about fixed axis A and is connected by turning pair B to link 2. Link 2 is connected by turning pair E to link 4 and by turning pair F to link 3 which turns about fixed axis G. Link 5 turns about fixed axis D and is connected by turning pair C to link 4. When link 1 turns about axis A, point M of link 4 describes a path of which a certain portion approximates a straight line.
$695$LW,GI$