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 makes the angle β with axis Ax. Cross-piece Bb of slider 4 is connected by a sliding pair to cross-shaped slider 6 which has guides wi th axes perpendicular to each other. Slider 2 moves along fixed guides q-q whose axis makes the angle α with axis Ax. Cross-piece Ca of slider 2 moves in slider 6. When link 1 turns about axis A, point D of slider 6, at the intersection of lines Bb and Ca, describes hyperbola p-p wi th the equation gxy+2hx+2ey+f=0 where g =-(tan(β)-tan(α)), h=m*tan(α)tan(β)/2, e=-n*tan(α)/2, f=-mn*tan(α)tan(β), m and n = constant dimensions of the mechanism.
$1081$LG,Ge$