Crank 1 rotates about fixed axis B and transmits motion by means of connecting rod 5 to piston 2 whose rod is connected to a slider that moves along fixed guides a-a. Slotted link 3 turns about fixed axis A and has slots b and c along which pins C and D slide. Pins C and D are secured to the piston rods of pistons 2 and 4. When crank 1 rotates about axis B, slider 2 reciprocates, oscillating slotted link 3 about axis A. Link 3 drives piston 4.
$1401$LG,PM$