. Locomotive engineering : a practical journal of railway motive power and rolling stock . arranged, and that a current of elec-tricity is flowing through the relay, ener-gizing the magnet and attracting thearmature ; if now a train, or even a pair ofwheels, should enter the section, a shortcircuit would be formed from one rail tothe other, cutting out the relay, as thereis practically no resistance through thewheels and axles—the current from thebattery flowing to the rail, from that railthrough the wheels to the other rail, andback to the battery. When the current is cut out in this way,the
. Locomotive engineering : a practical journal of railway motive power and rolling stock . arranged, and that a current of elec-tricity is flowing through the relay, ener-gizing the magnet and attracting thearmature ; if now a train, or even a pair ofwheels, should enter the section, a shortcircuit would be formed from one rail tothe other, cutting out the relay, as thereis practically no resistance through thewheels and axles—the current from thebattery flowing to the rail, from that railthrough the wheels to the other rail, andback to the battery. When the current is cut out in this way,the relay loses its magnetism and the arm-ature drops, separating the contact pointson the end of the armature, thereby break-ing the current passing through the:n. This other or second circuit flowingthrough the c ontact points is a more pow-erful one than that used for the track cir-cuit, and is the one made use of to oper-ate the signal, whether this is done by theapplication of electro-magnetism to theparts of the signal, or by controlling theaction of compressed air, or the force of. tained through the other one. At the endof each section furthest away from thesignal, a battery of two cells is located,the two poles of which are respectivelyjoined by wire to the two lines of rails ;the manner of attaching a wire to a railbeing shown in Fig. i, the connection be-tween two wires being .soldered. The cells, for protection, as well as toprevent their freezing in cold weather, areplaced in a box or battery well, shown inFig. 4, and buried in the ground. At thesignal end of the section a relay is placed,being connected by wires to the two linesof rails, and in this way establishing a cells are arranged in parallel, the current ofelectricity being increased thereby, whilethe voltage or pressure remains the sameas with one cell. This reducing of thepressure reduces the power of the currentto flow through a certain resistance, sothat where there would be a large leakageof electricity
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroa, bookyear1892
