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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
pper 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 gravity of lever from ful-crum ; C, distance of weight from… … C = S2 X.7854XPX A—(GX B) —(VX A)W

Mechanical movements

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