The mechanism is intended for tracing conchoids of Nicomedes of a straight line. Link 1 moves in slider 2 which turns about fixed axis D. Link 1 is connected by turning pair B to slider 3 which moves along fixed guides c-c. When link 2 turns about axis D, points C and C', located at the distance b from point B, describe the two branches of a conchoid of straight line c-c. The equation of the conchoid in polar coordinates is D͞C=D͞B/cos(α)±b. In rectangular coordinates it is (x-a)²(x²+y²)=b²x².
$1150$LG,Ge$