The lengths of the links comply with the conditions: A͞E=E͞G=G͞F=A͞F, E͞K=F͞K and G͞L=L͞K. The mechanism is based on the Peaucellier inversor which consists of rhombus linkage AEGF and rhomboid linkage AEKF. Link 3 is connected by turning pair L to link 2 and by turning pair G to links 6 and 7. Link 2 is connected by turning pair K to links 4 and 5. Link 2 belongs to straight rule p-p. As a result of the specified relationships, line p-p always passes through fixed point A. If point D is traced along an arbitrary curve, points C and B, at equal distances a from point D, describe curves with the polar equation ρ=A͞D-a. Vector ρ makes angle ϕ with axis Ax.
$769$LW,Ge$