The lengths of the links comply with the condition: 0͞C=r, where r is the radius of circle p-p which is to be converted into a fourth-order curve. Link 1 turns about fixed axis 0 and is connected by turning pair C to link 5 and by a sliding pair to slider 3. Link 5 is connected by a sliding pair to cross-shaped slider 2 which has guides perpendicular to each other. Slider 3 is connected by turning pair B to slider 4 which moves along fixed guides t-t whose axis is parallel to axis Oy. Cross-piece Bf of slider 4 has its axis parallel to axis 0x and is connected by a sliding pair to slider 2. When link 1 turns about axis 0, point C of link 1 describes circle p-p and point D of slider 2 describes fourth-order curve q-q with the equation x²(a²+y²)=a²r² where a is a constant dimension of the mechanism.
$1224$LG,Ge$