File:The street railway review (1891) (14574334529).jpg

Identifier: streetrailwayrev04amer (find matches)
Title: The street railway review
Year: 1891 (1890s)
Authors: American Street Railway Association Street Railway Accountants' Association of America American Railway, Mechanical, and Electrical Association
Subjects: Street-railroads
Publisher: Chicago : Street Railway Review Pub. Co
Contributing Library: Carnegie Library of Pittsburgh
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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desof a block, so that cars would be frequently meeting onthe single track were it not for the block signal whichhas been installed. Two trolley wires are used for thesingle track, as shown in the general plan in Figure i.This single track portion is separated by circuit breakersfrom the rest of the line. The signal boxes are con-nected in between the feeder and the trolley wire.When a car enters the block, the current which supplies system was devised in the companys office, at the sug-gestion of H. H. Littell, general manager. SUNDAY SERVICE IN SCOTLAND. The heading refers not to divine service, for faithfulattendance upon which the sturdy Scotchman is noted,but to the more secular and week-a-day occupation ofoperating street cars on the Lords day. Public agitationin the City of Glasgow has been quite active on the com-bined question of Sunday concerts in the City Halls andgo-to-meeting trams. The concerts fared but poorly,and it has finally been left to the curator to designate the
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.SIGNAL BOX, )F C IRCUITS. the car must flow from the feeder through the signal boxat the other end, thus giving cars going in the oppositedirection warning that a car is on the block. The detailof the signal box is shown in Figure 2. The main trolleycurrent flows around a solenoid of low resistance. Theplunger of this solenoid operates the disc or shutterwhich discloses the lights at night, and by its color givesthe day signals. The simplest way is to have these sig-nal lights permanently in circuit. The most economicalway is to have them cut in automatically, as shown here.This method has only one lamp circuit for the two signals.It would be simpler, of course, to have each bank of sig-nal lamps independent, as then no wires other than thetrolley and feed wires would be needed between theboxes, for the lamp circuit could be grounded at each box.The shutter is held to safety by a counterweight. The good from the bad and to put his seal of approval onsuch as may be deemed within the l

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