. Electric railway journal . is here described. As a part of the study of the operatingconditions of the road, careful tests were made of the speedat various points and the braking distance and consideration the motor-generator sets deliver 1100-volt, 25-cycle alternatingcurrent to the signal transmission line. The entire system, con-sisting of 75 signals with their controlling track circuits, etc.,requires for its operation about 10 kw. The signals user are three-position upper-quadrant sema-phores spaced to permit a headway of 45 seconds at the speedsencountered on the various parts of the l
. Electric railway journal . is here described. As a part of the study of the operatingconditions of the road, careful tests were made of the speedat various points and the braking distance and consideration the motor-generator sets deliver 1100-volt, 25-cycle alternatingcurrent to the signal transmission line. The entire system, con-sisting of 75 signals with their controlling track circuits, etc.,requires for its operation about 10 kw. The signals user are three-position upper-quadrant sema-phores spaced to permit a headway of 45 seconds at the speedsencountered on the various parts of the line. In this connec- 664 ELECTRIC RAILWAY JOURNAL. [Vol. XXXVII. No. 15. tion it might be stated that trains running from the pierterminus toward the mainland operate first at slow speedswhich are gradually increased to about 35 In runningfrom the mainland to the pier terminus the speeds over the3-mile pier are maintained approximately at 35 Thesevariations of speed require the arrangement of signals indicated. Key Route Signals—Details of Signal Pole and AutomaticStop Mechanism on the plan, by reference to which it will be noted that thesignals are spaced much closer in some locations than in others,this being necessary to maintain the 45-second headway undervarying speed conditions. The automatic stop feature is pro-vided by a stop arm operated by the signal mechanism which, of maintenance and inspection. A photographic view and anelevation drawing of a signal pole showing the outline of a carand its clearance line, together with the position of the signaland the automatic train stop, are reproduced. The signal forthe opposite track is indicated by dotted lines. Because of thesalt spray which at times reaches the deck of the pier, lead-covered cables were used throughout the signal installation formaking connections between transformers and relay boxes andbetween relay boxes and signal mechanisms. Lead-coveredwire was used to make connections between the relay
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