A history of the growth of the steam-engine . ce of the crank and fly-wheel, orof independent mechanism, like the cataract of the Cornishengine. There is a very considerable variety of pumps ofthis class, all differing in detail, but all presenting the dis-tinguishing feature of auxiliary valve and piston, and aconnection by which it and the main engine each works thevalve of the other combination. In some cases these pumps are made of considerablesize, and are applied to the elevation of water in situationsto which the Cornish engine was formerly considered exclu-sively applicable. The accomp
A history of the growth of the steam-engine . ce of the crank and fly-wheel, orof independent mechanism, like the cataract of the Cornishengine. There is a very considerable variety of pumps ofthis class, all differing in detail, but all presenting the dis-tinguishing feature of auxiliary valve and piston, and aconnection by which it and the main engine each works thevalve of the other combination. In some cases these pumps are made of considerablesize, and are applied to the elevation of water in situationsto which the Cornish engine was formerly considered exclu-sively applicable. The accompanying figure illustrates sucha pumping-engine, as built for supplying cities with is a compound direct-acting pumping-engine. Thecylinders, A B, are placed in line, working one pump, F,and operating their own air-pumps, J)D, hy a bell-crank STATIONARY ENGINES. 333 lever, i S, connected to the pump-buckets by links, exhausted from the small cylinder, A, is further ex-panded in the large cylinder, B, and thence goes to the. 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
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Keywords: ., bookcentury1800, bookdecade1870, bookidc, booksubjectsteamengines
