. Appleton's dictionary of machines, mechanics, engine-work, and engineering. lungers L and T is dependent on the quantityof water received during each stroke of the engine feed-pump by the cylinder H, and the quantity ofwater displaced from the cylinder, and thence into the boiler, is dependent on the area of surface andlength of travel of the plunger L ; from which it follows, that if the travel of the plungers is correctlyrecorded, we can at any time ascertain, by inspection of the counter-face, the actual amount delivered. WATER-PRESSURE ENGINE. The first engine erected in England with cyl
. Appleton's dictionary of machines, mechanics, engine-work, and engineering. lungers L and T is dependent on the quantityof water received during each stroke of the engine feed-pump by the cylinder H, and the quantity ofwater displaced from the cylinder, and thence into the boiler, is dependent on the area of surface andlength of travel of the plunger L ; from which it follows, that if the travel of the plungers is correctlyrecorded, we can at any time ascertain, by inspection of the counter-face, the actual amount delivered. WATER-PRESSURE ENGINE. The first engine erected in England with cylinder or piston-valves, was that put up in the Alport mines, Derbyshire, in the year 1842. This was a single cylinderengine. Its success was complete, and others were erected on the same plan. But in 1845, a com-bined cylinder engine was designed, and erected by the same engineer, which is found practically tohave several advantages for such large supplies of water as that consumed by the pumping-engine, ofwhich we subjoin accurate reductions of the working-drawings. Fig. S771 is a front elevation of the combined cylinder engine. Fig. S772 is a sectional view, andFig. 3773 is a general plan. PC is the bottom of the pressure column, 180 feet high, and 21 inchesinternal diameter. C C are the combined cylinders, each 24 inches diameter, open, at top,with hemp-packed pistons a, Fig. 3772, and piston-rods m, combined by a cross-head n, working between guides ina strong frame. The admission throttle-valve is a sluice-valve, shown at , Fig. 8771, and between theletters b and c in Fig. 3773. The main or working valve, is a piston g, IS inches in diameter. Fig. 8772,with its counter or equilibrium piston above. The orifice for the admission of the pressure water isbetween the two pistons. The intermediate pipe a is a Hat pipe, into which numerous apertures leadfrom the valve-cylinder, seen immediately under/;, Fig. 8772. The valve-piston is in the position fordischarging the wate
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Keywords: ., bookcentury1800, booksubjectmechanicalengineering, bookyear1861
