Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 78
216. POP SAFETY VALVE.—The Lun-kenheimer, an enlarged lip disc above the valvedisc, equalizes the increased tension of the springwhen the valve opens. STEAM POWER. 67 217. DIFFERENTIAL SEAT SAFETY VALVE—The enlarged area of the upper valve compensatesfor the differential tension of the spring upon… … 218. SAFETY VALVE,—Leveris of the third order. A, Short lever;B, centre of* gravity of lever from ful-crum ; C, distance of weight from ful-crum ; S, diameter of valve; P, pres-sure per square inch; G, weight of the lever at its centre of gravity; W, weight of ball; V, weight of valve and spindle.…
Mechanical movements
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