Mechanical movements, powers and devices; a treatise describing mechanical movements and devices used in constructive and operative machinery and the mechanical arts, being practically a mechanical dictionary, commencing with a rudimentary description of the early known mechanical powers and detailing the various motions, appliances and inventions used in the mechanical arts to the present time, including a chapter on straight line movements, by Gardner D. Hiscox (1914)
Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 78
ifferential 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 ful-crum ; S, diameter of valve;… … 219. ORIGINAL FORM of the yEolipile or HerosSteam Engine, 130 B.C. A reaction power, suitablefor operation by the use of any gaseous or fluid pres-sure. The original type of several modem motors. 220. STEEPLE ENGINE, with cross-head and slides. 68 STEAM POWER.
Mechanical movements
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