Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 78
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.… … 219. ORIGINAL FORM of the ^olipile 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-headand slides. 6S STEAM POWER.
Mechanical movements
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