Transactions . ed by a column of water 50 square inches in base and250 feet high, equal to 5454 poimds. Fig. 8 shows, in vertical section and plan, a water-balance pump,in which both valves are stationary. As will be seen by an in-spection of the drawing, the arrangement of the valve-box O, valve v; the H-piece T with the lower valve u; theplunger barrel L, with its plunger P may be the same as with anordinary Cornish plunger-pump, as shown at k, in Fig. 1. On the upper valve-box O, is a plunger-barrel D, with a stuffing-box a, at its upper end, through which works a hollow^ plun
Transactions . ed by a column of water 50 square inches in base and250 feet high, equal to 5454 poimds. Fig. 8 shows, in vertical section and plan, a water-balance pump,in which both valves are stationary. As will be seen by an in-spection of the drawing, the arrangement of the valve-box O, valve v; the H-piece T with the lower valve u; theplunger barrel L, with its plunger P may be the same as with anordinary Cornish plunger-pump, as shown at k, in Fig. 1. On the upper valve-box O, is a plunger-barrel D, with a stuffing-box a, at its upper end, through which works a hollow^ plunger E,quite open at its lower end, and at its upper end communicatingwith the upper portion of the moving pipe I, by means of the castiron or steel nozzle n, n. The plunger P, is connected with themain pij)e I, by means of the cross-head x x. The main pipe I,which conveys the strain in a straight line to the lower pumps, is AX IMPKOVED SYSTEM OF CORNISH 0. 433 Section Section YOL. VII.—28 434 AN IMPROVED SYSTEM OF CORNISH PITWORK. Fig. 7.
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
