Title: The elements of railroad engineering
Year: 1897 (1890s)
Authors: International Correspondence Schools
Subjects: Railroad engineering
Publisher: Scranton, Pa. : The Colliery engineer co.
Contributing Library: University of California Libraries
Digitizing Sponsor: Internet Archive
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h open and protecting the maintrack from runaway cars. When, on the other hand, the switch is placed for thesiding E E, the tension on the wire is relaxed and the longarm // of the derailing switch lever, being acted upon by the 1124 TRACK WORK. weight 0, is made to take the position n and the short armof the lever, the position ;//. This movement is transmittedby the connection rod to the switch rail, which takes theposition a (see detail (7), securely closing the switch. Theguard rail c is secured to the main rail/ by two heavy bolts,the space between them being maintained by a cast-ironthroat filler q. Near the derailing switch, a guard rail r isplaced, diverging from the outside rail, the object of whichis to prevent derailed cars from running on to the main line.A heavy plank s is spiked to the ties close to the outside railto prevent any derailed trucks from turning up the rails. 1690. Automatic Turnouts.—For dummy orstreet car roads using a light T rail, the automatic switch
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Fig. 536. shown in Fig. 53G may be used on turnouts, or passingtracks, to great advantage. There are two switch pointsa and b, one of which, a, is rigid, forming a combination offrog and switch point. It consists of a guard rail r, twothroat fillers d and i and the switch point a. The throatfillers between the switch point and the head block unite,forming a single filler, Avhich is grooved at f. When TRACK WORK. 1125 approaching or leaving the switch, the wheel flange enters thisgroove, bringing the wheel tread safely upon the stockrail g: In America, at least, it is the universal custom for carsapproaching a passing track to take the right-hand track inthe direction indicated in the figure by the arrows /// and //.Accordingly the switch is always set for the right-handtrack, the switch point I? being held firmly against the stockrail /i by means of the iron rod 1% which is acted upon by apowerful spring confined in the shell /. This shell is spikedto the head block between the rails
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