. Appleton's dictionary of machines, mechanics, engine-work, and engineering. s pillar is carried through thecentre of the air-chamber to the under side of the lower (or pump) pump-cylinders, suction and branch pipes, the air-chamber and its support, are of cast-iroD, PUMPING-ENGINE. 543 flanged and ribbed, as represented in the figures, the pump-cylinders tieing lined with compositionmetal. The mouths of the pumps are placed at the level of mean low water, in a chamber formed of cast-iron, 8 feet wide, 13 feet high, and 30 feet long,—the bottom of the chamber forming a support t
. Appleton's dictionary of machines, mechanics, engine-work, and engineering. s pillar is carried through thecentre of the air-chamber to the under side of the lower (or pump) pump-cylinders, suction and branch pipes, the air-chamber and its support, are of cast-iroD, PUMPING-ENGINE. 543 flanged and ribbed, as represented in the figures, the pump-cylinders tieing lined with compositionmetal. The mouths of the pumps are placed at the level of mean low water, in a chamber formed of cast-iron, 8 feet wide, 13 feet high, and 30 feet long,—the bottom of the chamber forming a support to theheads of the pump-cylinders, as well as a bed-plate for the air-pump and condenser of the engine: itssides, strongly ribbed, support the engine bed-plate with the superstructure, and the top is itself a partof the engine bed-plate. A culvert from the bay leads up to one of the sides of this chamber, andserves as a conduit for the water delivered from the pumps. Twelve of the panels of the side of the 4029.—Elevation and Section of the 1 £ 3 4 J .10 zo. chamber adjoining the conduit are open, and furnished with flap-valves of vulcanized India-rubber,opening outwardly to prevent the rising tide from flowing into the chamber. Four oast-iron girders ofJ. section, 32 inches deep, are placed transversely across the well, directly underneath tho bottom ofthis chamber, and are held down to the masonry by suitable bolts. The arrangement of the pump-valves is of somewhat novel character, a suction-valve being placednear the bottom of each suction-pipe, in addition to the usual one near the bottom of the pump-cham-bers. Each of these valves is provided with suitable chests and bonnets, ami is composed of vulcanizedIndia-rubber, witli the usual metal guard above. A disk of India-rubber, cut to the proper shape, withpunctures along its diameter, is slipped over standards, tapped into the valve-seat, and secured bywashers and the nuts of the guard; the India-rubber alon
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Keywords: ., bookcentury1800, booksubjectmechanicalengineering, bookyear1861
