Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 928
3.1416 = 1.57. 1.8 + 1.S5 -f 1.57 = 3.42 square inches, thearea of opening required. Fig. 4168 shows a conical disk-valve and casing. The valve is guided in rising and falling bythree feathers, which fit the cylindrical part of the seating, and are shown in the plan of the valve.The lift of the…
Mechanical engineering -- Dictionaries
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