. The ways of our railways . the next section. It is the actualpresence of the train in this further section whichby depressing an electrical rail-contact notifiesto the signalman that his section is clear and giveshim the power to permit the man behind him toadmit another train. On the Great Northern foryears past sections of the rails outside Kings Crossstation have been insulated in connection withthe application of batteries, relays, and electric locksto the signals. Under this system the signalmanis reminded of the presence of a train waiting for asignal to proceed, by the wheels and axle
. The ways of our railways . the next section. It is the actualpresence of the train in this further section whichby depressing an electrical rail-contact notifiesto the signalman that his section is clear and giveshim the power to permit the man behind him toadmit another train. On the Great Northern foryears past sections of the rails outside Kings Crossstation have been insulated in connection withthe application of batteries, relays, and electric locksto the signals. Under this system the signalmanis reminded of the presence of a train waiting for asignal to proceed, by the wheels and axles of theengine short circuiting * the insulated section, theprocess putting an electric lock upon conflictingsignals and giving the signalman both audible andvisual indication of the position of the train, whenit is out of his sight. It is common knowledge that the telegraphicblock system of railway signalling is supplementedat junctions of two or more tracks by the interlockingsystem, whereby the signalman is prevented from. THE ELECTRICAL EQUIPMENT. 117 pulling off signals or setting points which conflictone with another. In the ordinary form of inter-locking, electricity is not employed, the work beingdone by horizontal and vertical steel bars containedin a frame beneath the levers in the signal-box,notches in which, by interlocking with one another,determine what movements of the levers can bemade. This is sufficient for the safeguarding of thesimpler kinds of junctions, but where there are amaze of lines crossing one another, it is necessaryto supplement the mechanical interlocking withelectrical locks of various kinds. In addition to itsuse in this and other ways as a controller of thesignalman, electricity is also extensively employedin modern installations as the means of enablingthe man to do the actual work of pulling over thesignals and setting the points. In some S3stems,such as that installed on the London and North-western at Crewe and elsewhere, and in the system
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1910
