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Mechanical movements, powers and devices; a treatise describing mechanical movements and devices used in construcive and operative mechinery and the mechanical arts, being practically a mechanical dictionary (1917)

Hiscox, Gardner Dexter, 1822?-1908 · New York : The Norman W. Henley publishing co. · leaf 74

An illustration from Mechanical movements, powers and devices; a treatise describing mechanical movements and devices used in construcive and operative mechinery and the mechanical arts, being practically a mechanical dictionary, 1917, leaf 74
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.—Lever is of the third order. A, Short lever;B, centre of…

Mechanical movements

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