. Railway maintenance engineering, with notes on construction . 55 ft.) to engage the wheels on both trucks of a car. It will be observed that no detector bars are shown for theswitches and derails on the double track Hne in Fig. 182. Herea detector circuit takes the place of the detector bar, the cir-cuit being extended to pro\ide route locking. That is after atrain passes either distant signal 2581 or distant signal 2602 thelevers in the tower are electrically locked, so the tower man can-not open the switches or derails on the track upon which the trainis approaching. SIGNALS AND INTERLOCKE
. Railway maintenance engineering, with notes on construction . 55 ft.) to engage the wheels on both trucks of a car. It will be observed that no detector bars are shown for theswitches and derails on the double track Hne in Fig. 182. Herea detector circuit takes the place of the detector bar, the cir-cuit being extended to pro\ide route locking. That is after atrain passes either distant signal 2581 or distant signal 2602 thelevers in the tower are electrically locked, so the tower man can-not open the switches or derails on the track upon which the trainis approaching. SIGNALS AND INTERLOCKERS 333 Derails are used at the signals controlling the crossings forthe purpose of derailing a train if the signal should be Fig. 182, Nos. 3, 8, 14, 16, 22, 26 and 32 are are of two general kinds, first, where the track is broken, locking Plungers. Fig. 183.—Switch and Lock Movement, Model 2, Union Switch and Signal Co,
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1915
