. Electric railway journal . and may be a part of such signalsystem if desired. These relays are energized from the batteryD through the signal rails. If a train is located as indicated by Train 2, its wheels willshort-circuit the battery D$ and therefore drop the armaturesof relay S3. This opens the branch feed to relay A2, but doesnot otherwise affect the system. If, however, Train 1 movespast signal 2 into section 3, its wheels short-circuit battery causes the armature of S2 to drop which opens the otherfeed to A2, which, releasing its armature, opens C2. The cur-rent is also cut of
. Electric railway journal . and may be a part of such signalsystem if desired. These relays are energized from the batteryD through the signal rails. If a train is located as indicated by Train 2, its wheels willshort-circuit the battery D$ and therefore drop the armaturesof relay S3. This opens the branch feed to relay A2, but doesnot otherwise affect the system. If, however, Train 1 movespast signal 2 into section 3, its wheels short-circuit battery causes the armature of S2 to drop which opens the otherfeed to A2, which, releasing its armature, opens C2. The cur-rent is also cut off from Bi, which opens Ci, thus cutting offthe power from both ends of the rail feeding Train r, whichthen comes to a stop. If Train 2 then proceeds and passesout of sections 5 and 6, the relay 53 picks up, thereby closingthe circuit to A2 and Bi, which pick up their armatures. Thecircuit-breaker C2 then closes upon which Ci will close andnormal operation is resumed. It will be noted that in the above operation A2 and B2 are. £; Ciicuit Breaker HeM Closed bj Coil C. 0]* Signal Rail is Shown fed from Buttery (D). Jfl Signal14 B are Circuit Breaker ( Control Relays,Breakers will Open if Circuit to Either A or Bis Opened. Breakers will Close aod Stay Closedif Both A and B are Either Open or Closed. c 2 S and T are Track Relays. Vl This Line may also feed Signal System. It may be fed as Shownor from Motor-flenerators or Transformers, from one or both ends. Electric Hit. Journal Diagram of Automatic Train Stop System with Normally Closed Circuits, for Operation in One Direction the full conductivity of the power circuit is available and thatas long as the trains are not run within a predetermined dis-tance of the train ahead, the circuit breakers mentioned will notoperate. The system has also been designed for the protec-tion of interurban roads equipped with a signal system, inwhich both track rails are used for the return circuit. Referring to the wiring diagram, it will be noted
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