. First series of Railway practice: a collection of working plans and practical details of construction in the public works of the most celebrated engineers comprising roads, tramroads and railroads, bridges, aqueducts, viaducts, wharfs, warehouses, roofs, and sheds, canals, locks, sluices, & the various works on rivers, streams, &c., harbours, docks, piers and jetties, tunnels, cuttings and embankments, the several works connected with the drainage of marshes, marine sands, and the irrigation of land, water-works, gas-works, water-wheels, mills, engines, &c. &c. . rain proceedsfrom the point
. First series of Railway practice: a collection of working plans and practical details of construction in the public works of the most celebrated engineers comprising roads, tramroads and railroads, bridges, aqueducts, viaducts, wharfs, warehouses, roofs, and sheds, canals, locks, sluices, & the various works on rivers, streams, &c., harbours, docks, piers and jetties, tunnels, cuttings and embankments, the several works connected with the drainage of marshes, marine sands, and the irrigation of land, water-works, gas-works, water-wheels, mills, engines, &c. &c. . rain proceedsfrom the point towards the lieel of tiie swit<^h: it is necessary, in fact, for theswitchman to lift up the counterpoise, in order to open the oblique way, at thetime of a train passing. An accident which occurred on the Orleans line, proves this to be a seriousinconvenience : we ought nut, however, to employ a catch for the purpose of guard-ing against it, since the counterpoise would then be perfectly useless. It ismerely necessary, in order to ameliorate this movement in the way as much aspossible to dispose the levers in a convenient position, so that the slightest forceshall be suflicient for them. The switch rail tic (in the cut) which serves for the oblique way, is theonly one that produces a change in the direction of the train, and consequentlythe only one necessary to be formed of great length; being made 4 50 (14 feet9 inches) or upwards. The second t</ which forms a part of the right way, isgenerally 3™ to S™ 50 (9 feet 9 inches to 11 feet G inches.). The switch rails are connected together—1st. At their heels, by means ofa strong sleeper, the centre of rotation being always placed perpendicular to theaxis of the crossing—2ndly. By an iron bar, either round or square, near thepoint of the switch eg. It is considered requisite to provide means of length-ening or shortening this bar, in order to adjust the relative position of the twoswitch rails, as may be necessary i
Size: 2721px × 918px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbreesscs, bookcentury1800, bookdecade1840, bookyear1847
