Slider 1 moves along fixed guides t-t whose axis passes through Eoint A making the angle ϕ with axis Ox. Slider 1 is connected y turning pair M to link 2 having the form of a bent lever with the angle aMf equal to ϕ. Arm Md of link 2 moves in slider 3 which turns about fixed axis F. Point F is placed at the focus of a parabola and point A is located on axis Oy (passing through vertex 0 of the parabola) at the distance A͞0 equal to A͞0=0͞F/tan(ϕ)=p/2*tan(ϕ) where p is the given distance between the focus of the parabola and its directrix. Then, when slider 1 moves along guides t-t, straight line Mf envelops parabola q-q.
$1110$LG,Ge$