The lengths of the links comply with the conditions: A͞B=r and C͞D=f. Crank 1 turns about fixed axis A and is connected by turning pair B to slider 5 which moves along slot a of link 2. Link 2 slides in fixed guide p and is connected by turning pair C to link 3 which has the form of a T-shaped lever with two slots b and d perpendicular to each other. Slider 6, moving along slot b, is connected by turning pair B to slider 5. Slider 7, moving along slot d, is connected by turning pair E to link 4 which slides in fixed guide q. The displacement of link 4 in guide q equals s₄=r(1-sin(ϕ)+(k/f)*cos(ϕ)) i.e. the linear displacement of link 4 is obtained as the result of the linear displacement of link 2 and the rotation of slotted link 3.
$1287$LG,MO$