Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892)
Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 328
e of the valve, and, being inclosed by the telescopic shells,presses the faces apart with relation to each other, and against the port or passage-way sur-face, as shown. By this arrangement there is only a sufRcient percentage of the whole areaof each valve subjected to unbalanced pressure to… … Valve.
Mechanical engineering
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