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Knight's Mechanical Encyclopedia (ed. Knight) 2 0 Browse Search
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Knight's Mechanical Encyclopedia (ed. Knight), W. (search)
f water in the latter operates the smaller piston, and this actuates the main valve. Somewhat similar is the construction adopted by the Hudson Brothers in their steam-pump, and it likewise is applicable to liquid meters. The larger piston in its motion uncovers a port leading to the smaller cylinder; the pressure of water in the latter actuates the small piston, and this moves the valve. But one valve is thus used at each end of the double-acting apparatus. The valve-apparatus of R. C. M. Lovell's steamquarry-ing machine is thus constructed. George I. Washburn's engines, whose construction adapts them to be used as meters, are suggested by the foregoing remarks on the Worthington meter. In Washburn's, two pistonstems are used, reciprocating in their several cylinders, and each having a plurality of disks. Though his numerous engines vary in details, the feature of a plurality of disks on pistons reciprocating in separate cylinders is preserved. In most of his engines, the