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 926
thoseused in gas machinery, see articles under Gas ; for those used in heating apparatus, see Heating bySteam and Hot Water. Special forms of valves are described under Rock-Drills,Water-Meters,and Water-Wheels. Valves generally considered, with reference to the manner in which their motion is… … 892 VALVES AND COCKS. as to render the times of opening and closing synchronous with the motions of the machine; 4.Valves opened and closed by the action of the fluid. With regard to the motion relative to the scat,valves may be classified as follows: 1. Flap-or butterfly-valves, which rotate in…
Mechanical engineering -- Dictionaries
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