File:Elements of railroad track and construction (1908) (14573147638).jpg

Identifier: elementsofrailro01wils (find matches)
Title: Elements of railroad track and construction
Year: 1908 (1900s)
Authors: Wilson, Winter L. (Winter Lincoln), b 1866
Subjects: Railroads Railroad tracks
Publisher: New York, J. Wiley
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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tinuous rail for the main track. In Fig. 68 is shown the arrangement of the rails in aspring frog. The spring in the case S holds the movablewing rail a b firmly against the adjoining part of the frogso that the main rail a c is practically unbroken. Whena train is passing from the turnout to the main track, thewheel flanges enter the heel of the frog at b and force thewing rail over, the spring not being stiff enough to pre-vent this action, but being stiff enough to force the wingrail back after the flanges have passed. In the samemanner the wing rail is forced over when a train entersthe turnout from the main track, the guard rails whichare always placed on both the turnout and main trackopposite the frog assisting in this action. A spring frogis more complicated in design than a stiff frog, not onlyon account of the movable parts and the spring, but alsoon account of the special tie plates and braces necessaryfor the proper working of the frog. 104 RAILROAD TRACK ANP CONSTRUCTION.
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TURNOUTS. 105 The section through A B is shown in Fig. 69a. Thefixed wing rail deis bolted to the frog point rails throughrolled steel fillers shown in the figure. In Figs. 69a and696 is showTi the reinforcing bar which is riveted to theweb of the movable wing rail a b. This bar is not sho^niin Fig. 68, as the additional lines necessary to show itwould add confusion to the figure. For the same reasonthe spikes, the bolts, and some of the rivets are notshown. The movable wing rail a b slides over the tie platesand is braced when pushed over by the flanges bythe braces / / shown in Figs. 68 and 69c, the bracesbeing riveted to the tie plate and shaped so thatthey fit snugly against the web of the rail or the re-inforcing bar. The wing rail is further controlled bythe arm g which is riveted to the rail and movesthrough a socket riveted to the tie plate. In Fig. 69?>is shown a section through C D. 115. Crossing Frogs.—Crossing frogs are necessarywhere two tracks cross each other at gr

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