Railroad Economics: Or, Notes, with Comments from a Tour Over Ohio Railways Under the Hon. H. Sabine, Commissioner of Railroads and TelegraphsD. Van Nostrand, 1882 - 131 páginas |
Otras ediciones - Ver todas
Términos y frases comunes
alignment angle bars appears ARCHES ballast bl³ bolts cattle guard cent center of gravity circle curve circular curve clamps cloth diagrams dynamic effect easement curve east span elastic limit engine equal eyebars fact feet chords figure fish plate flanges floor beams freight trains frog GILLMORE gineer given grade crossings Hence horizontal I-beam Illustrated indicated instance intersection iron bridges know-nothing stop laid latter length locomotive low joints lower chord middle midspan miles per hour nearly NOSTRAND'S PUBLICATIONS Ohio Railway outer rail passenger train passing pencil rose PRESCOTT principal curve Prof radius of curvature rail elevation railroad riveted road master rods safety short spans side signals speed spiral spring square inch STEAM steel straight straight rail sway braces switch tangent point tie rods tion total deflection angles truss upper chords usually vertical vibration west span wheels wooden bridge
Pasajes populares
Página 71 - ... easement curve, it appears that the very best conditions possible to adopt for fixing it are to assume, first, that the car, in tilting to the difference of rail elevation as it passes along the easement curve, shall rotate about a longitudinal axis passing through the centre of gravity of its cross section, and, second, that it be accelerated in that tilting movement, so that a passenger at the side of the car shall experience only the sensation of a slight change in his own weight while on...
Página 28 - muckbars" (the result of first rolling from puddle blooms), cutting and piling them, reheating to a welding heat, rolling into bars, then cutting, piling, and reheating again, when they are rolled to the needed sizes. Compression pieces are single refined, in which the last piling and rolling above described is omitted. Channel bars of columns and upper chords are thus treated. A fair quality of double refined iron in bars should have a tensile strength of 50,000 pounds per square inch ; an elastic...