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 767
requiring no packingaround the valve-stem. The jiorts have cutting edges and ashearing motion, thus effectually preventing the formation ofice or the accumulation of foreign matter on the valve seats,which so often prevents the closing of other forms of valves.By the rotary motion of the valve, and… … Fi(i. 9.—Curlii prc-Mire regulator RIVETING MACHINES. 739 without extra mechanism, the weight of the piston closing the valve whenever the supply of gas fails. Nor can any leak around the piston or diaphragm, or increased pressure of gas,force the valve open and allow the gas to blow through. The…
Mechanical engineering
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