Crank 1 of radius A͞P=r turns about fixed axis A and is connected by turning pair P to cross-shaped slider 5 which has guides perpendicular to each other. Link 2 turns about fixed axis 0 and is connected by sliding pairs to sliders 5 and 4. Link 3 has the form of a bent lever and turns about axis 0. Link 3 is connected by turning pair C to link 6 which moves in slider 5. Arm Ca of link 3 moves in slider 7 which is connected by turning pair Q to slider 4. The mechanism complies with the inversion condition 0͞Px0͞Q=P͞C². Point P describes circle p-p of radius r while point Q describes circle q-q of a radius equal to R=(0͞C²x(r))/(0͞A²-r²). Centres A and B of circles p-p and q-q are determined from the condition 0͞B/0͞A=R/r.
$1362$LG,GI$