Slider 1 moves along fixed guides t-t whose axis coincides with axis Oy. Slider 1 is connected by turning pair C to link 3 having the form of a bent lever with the angle dCd₁ equal to 90° . Arm Cd of link 3 moves in slider 2 which turns about fixed axis A. Arm Cd₁ moves in slider 4. Cross-shaped slider 6 has guides perpendicular to each other and is connected by sliding pairs to cross-piece Cf of slider 1 and to link 5. Link 5 slides along fixed guides r-r whose axis coincides with axis Ox. When slider 1 moves along guides t-t, point D describes parabola q-q with the equation y²=2px, where p is the distance from the focus of the parabola to its directrix.
$1104$LG,Ge$