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 320
ed with sand, upon the upper surfaceof which rest the plungers P P. To strike the centre, small holesin the lower part of the cylinders, stopped by corks, are opened, CENTRES. 295 when the sand runs out, and allows the upper plate A to settlegradually. Centres are strained in a different manner as… … Fig. 128. be, to a great extent, checked. The work should be carried upuniformly, upon both sides of the crown, at once, otherwise thedistortion of the centre will be unsymmetrical. The ribbed frames above shown are placed from 1 to 5 feetapart, according to the load to be supported. Upon the top…
Railroad engineering
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