. Electric locking . ircuit is shown as ap-plied to the same layout as in previous figure. The lock circuitsare composed of two parts, namely,, the battery feed wire W andthe lock wire Z. The lock wire receives battery from a back con-tact of the stick relay while battery is fed to the other end of theroute over the battery feed wire through the front point of re-lay S. Thus, it will be seen that when a train is going in thedirection when the stick relay is energized, battery is fed behindthe train as it proceeds. When the train is proceeding in theopposite direction the stick relay being de-e
. Electric locking . ircuit is shown as ap-plied to the same layout as in previous figure. The lock circuitsare composed of two parts, namely,, the battery feed wire W andthe lock wire Z. The lock wire receives battery from a back con-tact of the stick relay while battery is fed to the other end of theroute over the battery feed wire through the front point of re-lay S. Thus, it will be seen that when a train is going in thedirection when the stick relay is energized, battery is fed behindthe train as it proceeds. When the train is proceeding in theopposite direction the stick relay being de-energized, the currentis also fed from behind the train. The lock wire from eitherside is also controlled through a front point on the track relayof the section in which the switch is located, thus providing abso-lute section locking. It will be evident that by combining thestick relay and lock circuits the switches and derails will alwaysbe locked ahead of and under a train while those behind a trainwill be Jk—St isi EI FIGS. 173a and 173b. Operation. Referring to Figs. 71 and 72 the operation willbe as follows: The reversal of lever 8 will pick up stick relayS and the relay will stick up through back joints of the track re-lays in the route. The picking up of this relay will cut currentsupply from lock wire Z and the locks will be fed through bat-tery feed wire W, through front point of stick relay S and frontpoint of track relay C. A train entering track section C will de-energize all the lever locks, but a train having passed from sec-tion C onto section B will energize lock C, and so on. The clear- 167 ELECTRIC LOCKING ing of signal 1 will feed all locks through the back point of stickrelay and through front point of track relay A. Selections of Stick Relay Circuit. In the track layout inFig. 173a the pick-up wire is selected on switches 2 and 3; ifeither one is reversed the X wire will select on other switchesand through the lever contact on an opposing signal
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Keywords: ., bookcentury1900, bookdecade1910, bookidcu31, booksubjectrailroads
