The lengths of the links comply with the conditions: AC = = 1 .86 AB and I = 3 .57 AB. Crank 1, rotating about fixed axis A, is connected by turning pair B to slider 3 which moves along the axis of link 4. Link 4 is connected by a sliding pair to slider 5 which oscillates about fixed axis C. Link 2, connected by turning pair D to link 4, slides in fixed guides a-a. When crank 1 oscillates at uniform velocity through angles ϕ on both sides of vertical line A͞C, link 2 reciprocates with approximately uniform velocity.
$1009$LG,6L$