The lengths of the links comply wi th the conditions: A͞C=1.86A͞B and l=3,47A͞B. Crank 1, rotating about fixed axis A, is connected by turning pair B to link 3. Link 3 moves in slider 4, turning about fixed axis C, and in slider 5 which is connected by turning pair D to link 2. Link 2 reciprocates in fixed guides 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.
$1019$LG,6L$