Manual for railroad engineers and engineering students : containing the rules and tables needed for the location, construction, and equipment of railroads as built in the United States (1883)
Vose, George L. (George Leonard), 1831-1910 · Boston : Lee and Shepard · leaf 41
e increases, this corrugated top is forced inwards or down-wards. When, on the other hand, the atmospheric pressure de-creases, the elasticity of the metal, aided by a spring or by acounterweight, tends to move it in the opposite direction. Thismovement of the top of the box is conveyed by a series… … Fig. 6. with corrugated top, exhausted of air, and fixed to the bottom ofa brass case enclosing the mechanism of the whole instrument.B is a small column, connecting the top of the box with the prin-cipal lever E D, the latter moving upon the fulcrum C. Themovement of the small end of the lever is…
Railroad engineering
Internet Archive · Northeastern University Library · Public Domain Mark 1.0. Free to use for anything.
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