Sliders 1 and 2 slide along fixed guides p and q whose axes make angles <p with axis Ox. Bent lever 3 moves in sliders 5 and 4 which are connected by turning pairs A and B to sliders 1 and 2. Link 6 moves in guide a of lever 3 and in slider 7 which is connected by turning pair B to link 4. When points A and B move along guides p ana q, point K describes a hyperbola with the equation x²/(a/tan(ϕ))²-y²/a²=1 where a=K͞D.
$1065$LG,Ge$