Link 1, turning about fixed axis A, is connected by sliding pairs to sliders 3 and 5 . Slider 3 is connected by turning pair B to slider 4 which moves along fixed guides t-t. The axis of guides t-t is parallel to axis Ay. Cross-piece Bb of slider 4 is connected by a sliding pair to cross-shaped slider 6 which has guides with axes perpendicular to each other. Slider 2 moves along fixed guides q-q whose axis is parallel to axis Ax. Cross-piece Ca of slider 2 moves in slider 6. When link 1 turns about axis A, Soint D, at the intersection of Bb and Ca, describes equilateral yperbola p-p with the formula xy=cm where c and m are constant dimensions of the mechanism. Axes Ax and Ay are asymptotes of hyperbola p-p.
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