Link 1 has straight translational motion along fixed guides a-a. This link has a zigzag slot b-b. Link 2, ending in a rhombus-shaped head c which slides along slot b-b, has straight translational motion in fixed guides d-d. The axes of guides a-a and d-d are perpendicular to each other. The mechanism converts straight translational motion of link 1 in one direction into straight reciprocating motion of link 2. Displacement s₁ of link 1 is related to displacement s₂ of link 2 by the equation s₁=s₂ tan(α/2).
$2172$WL,3L$