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 … DIFFERENTIAL SEAT SAFETY VALVE.— The enlarged area of the upper valve compensatesfor the differential tension of the spring upon open-ing the valve, thus causing the valve to open widewithout increase of boiler pressure. 218. SAFETY VALVE.—Leveris of the third order. A, Short lever;B, centre of…
Mechanical movements
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