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 StatesLee and Shepard, 1878 - 570 páginas |
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Otras ediciones - Ver todas
Manual for Railroad Engineers and Engineering Students: Containing the Rules ... George Leonard Vose Sin vista previa disponible - 2015 |
Manual for Railroad Engineers and Engineering Students: Containing the Rules ... George Leonard Vose Sin vista previa disponible - 2013 |
Manual for Railroad Engineers and Engineering Students: Containing the Rules ... George Leonard Vose Sin vista previa disponible - 2015 |
Términos y frases comunes
20 feet abutment amount angle arch ascends average axles bars beams Bletchingly bottom braces bridge caisson cars cast iron cent centre column compression compression members connected cost curvature curves cylinder D. K. Clark degrees of curvature depth diagonal diameter distance double earth eastern end Eisack embankment engine excavation expense factor of safety feet long feet per mile feet per month feet span flange foot freight girder haul horizontal increase joint lateral length load locomotive lower chord masonry material mile run miles an hour panels passenger Pennsylvania Railroad piers piles plate pounds per inch radius rail railway resistance rivets road rock rods shaft shearing shearing strength shown in Fig side slope speed square inch steam steel strain strength Strength of Materials Summit surface tensile tensile strength tension thick timber tons top chord track truss tunnel upper chord vertical weight wheels width wrought iron
Pasajes populares
Página iii - The THEORY of STRAINS in GIRDERS and similar Structures, with Observations on the application of Theory to Practice, and Tables of the Strength and other Properties of Materials.
Página 53 - Method of Calculating the Cubic Contents of Excavations and Embankments by the Aid of Diagrams 8vo, 2 00 Webb's Economics of Railroad Construction Large 12mo, 2 50 Railroad Construction 16mo, mor.
Página 279 - I found the bed of the river, for at least three feet in depth, a moving mass, and so unstable that, in endeavoring to find footing on it beneath the bell, my feet penetrated through it until I could feel, although standing erect, the sand rushing past my hands, driven by a current apparently as rapid as that at the surface.
Página 259 - The welding of steel bars, owing to their being so easily burned by slightly overheating, is a difficult and uncertain operation.
Página 259 - In screwed bolts the breaking strain is found to be greater when old dies are used in their formation than when the dies are new, owing to the iron becoming harder by the greater pressure required in forming the screw thread when the dies are old and blunt, than when new and sharp.
Página 289 - It soon became apparent, however, that this new means of transport was attended with qualities which must exclude every indiscriminate exercise of the carrying business. A railway, like a vast machine, the wheels of which are all connected with each other, and whose movement requires a certain harmony, cannot be worked by a number of independent agents. Such a system would speedily be attended with self.destruction. The...
Página 233 - Such information, to be obtained through a system of daily reports and checks that will not embarrass principal officers, nor lessen their influence with their subordinates.
Página 259 - ... their cinder envelopes. But the cohesion between the iron and its cinder once destroyed, and its strength is gone. Now whether cohesion is the result of magnetic attraction (according to Faraday) or otherwise, this process appears to be purely mechanical. But let the explanation, which is here offered, be correct or not, the fact remains that fibrous iron and all kinds of iron and steel, will be rendered brittle by vibration and tension, or by bending and twisting, without undergoing any mysterious...
Página 309 - 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.
Página 258 - ... anvil, then strike a few heavy blows upon the nip, so that each blow will cause the bar to rebound and to vibrate intensely, and the result will be a granular and somewhat crystalline fracture. Now take up the two halves, and nip them again all, around, about one or two inches off the fractured ends, break them off 'by easy blows over the round edge of the anvil, and the fibre will appear again. This experiment proves that a break, caused by sudden jars and intense vibration, may show a granular...