A history of the growth of the steam-engine . condenser, C. The valves, NM, are moved by the valve-gear, X, which is actuated by the piston-rod of a similarpair of cylinders placed by the side of the first. These 334 THE STEAM-ENGINE OF TO-DAY. valves are balanced, and the balance-plates, Ji Q, are sus-pended from the rods, 0 P, which allow them to move withthe valves. By connecting the valves of each engine with. STATIONARY ENGINES. 335 the piston-rod of the oth^r, it is seen that the two enginesmust work alternately, the one making a stroke while theother is still, and then itself stoppiag a


A history of the growth of the steam-engine . condenser, C. The valves, NM, are moved by the valve-gear, X, which is actuated by the piston-rod of a similarpair of cylinders placed by the side of the first. These 334 THE STEAM-ENGINE OF TO-DAY. valves are balanced, and the balance-plates, Ji Q, are sus-pended from the rods, 0 P, which allow them to move withthe valves. By connecting the valves of each engine with. STATIONARY ENGINES. 335 the piston-rod of the oth^r, it is seen that the two enginesmust work alternately, the one making a stroke while theother is still, and then itself stoppiag a moment while thelatter makes its stroke. Water enters the pump through the induction-pipe, JE,passes into the pump-barrel through the valves, Y V, andissues through the eduction-valves, T T, and goes on to the mains by the pipe, G, above which is seen an air-cham-ber, which assists to preserve a uniform pressure on thatside the pump. This engine works very smoothly andquietly, is cheap and durable, and has done excellent duty. Beam pumping-engines are now almost invariably builtwith crank and fly-wheel, and very frequently are com-pound engines. The accompanying illustration representsan engine of the latter form.


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Keywords: ., bookcentury1800, bookdecade1870, bookidc, booksubjectsteamengines