. Electric locking . he last section in the route or the first section beyond the inter-locking. Also the lock relay or lever lock should be brokenthrough the track relay points (front points) in the route, andthereby provide full section locking protection if the switchesand derails have lever locks. Emergency Releases. Whenever a stick relay is releasedby the reversal of a slow release the lock which is released by thestick relay should be broken through a normal contact on therelease. If the release does not contain enough contacts for thispurpose a relay can be controlled by the normal con
. Electric locking . he last section in the route or the first section beyond the inter-locking. Also the lock relay or lever lock should be brokenthrough the track relay points (front points) in the route, andthereby provide full section locking protection if the switchesand derails have lever locks. Emergency Releases. Whenever a stick relay is releasedby the reversal of a slow release the lock which is released by thestick relay should be broken through a normal contact on therelease. If the release does not contain enough contacts for thispurpose a relay can be controlled by the normal contact on therelease and the lever locks through a front point of this stick locking the slow release will of course always shunt outthe releasing medium as the back point of the track relay, a pointon a track instrument, or time release. The Control of the Stick Relay. Stick locking is mostfrequently employed for high speed routes only and for thatreason the selection of its control wire is often required. An. 1-1/9/ Bf 1 7~ M FIG. 132b. example of a selective dropping arrangement is shown in The stick relay S will drop when signal 1 is cleared for amovement over switch 2 normal while 2 reversed will keep thestick relay energized. 137 ELECTRIC LOCKING Where the compulsory placing of the signal lever is desiredbefore the route can be released the stick relay stick-up or pick-up-wire should break through contacts on the signal levers closed,only with the signal assuming the stop position. With a normallyde-energized stick relay scheme the circuits previously shownwill pick up stick relay without the placing of the leVer Fig. 132b an example is shown where the lever must be-placed normal before the stick relay is picked up. Where thestick relay is to be controlled through circuit controller on thehome and distant signals for two routes a selection of the control,wire is necessary or else two stick relays must be a stick relay co
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Keywords: ., bookcentury1900, bookdecade1910, bookidcu31, booksubjectrailroads
