Link 2 slides along fixed guides a. Link 1 slides in guides b of link 2. Link 3 slides along fixed guides e. The axes of guides a and e are parallel to each other and are perpendicular to the axis of guides b. Link 1 has guide c whose axis makes the constant angle a with the axis of guides b. Rigidly secured to link 3 is slide-block d whose axis makes the constant angle 90°-α with the axis of guides e. The displacement s₃ of link 3 is determined from displacements s₁ and s₂ of links 1 and 2: s₃=s₂+ks₁ where k=tan(α).
$1257$LG,MO$