File:The Street railway journal (1907) (14573185779).jpg

Identifier: streetrailwayjo301907newy (find matches)
Title: The Street railway journal
Year: 1884 (1880s)
Authors:
Subjects: Street-railroads Electric railroads Transportation
Publisher: New York : McGraw Pub. Co.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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s provided. This panel is fitted with switches so that anycircuit breaker may be tripped by hand, or closed by theattendant in the signal tower. There is also a switch bymeans of which the attendant may connect either of theshunt transformers on the anchor bridge to the controlcircuit. AUXILIARY FEEDERSThe auxiliary feeders, which are supported on the innerinsulators of the lower bracket arm on the bridges, are YARD CONSTRUCTIONAt a number of points along the road, where there arenumerous side-tracks, it is necessary to provide extra longbridge supports. Fig. 16 represents one of these longbridges, which is designed to cover twelve tracks. Thecatenary cable insulators are attached to the lower memberof the truss. TRACK BONDINGBoth rails of all tracks are bonded by means of No. 0000compressed terminal flexible bonds placed around the fish-plates. TURN-OUTS AND CROSS-OVERSWhenever one track diverges from another a section in-sulator shown in Fig.- 17 is inserted in the trolley wire. In-
Text Appearing After Image:
FIG. 18.—DEFLECTOR WIRES IN PLACE BETWEEN THE MAIN TROLLEY AND CROSS-OVER TROLLEY looped in to the bus-bars on each alternate anchor bridge.These connections are made through automatic circuitoreakers, so that in case of the grounding of the bus-barstructure to any anchor bridge, one of the auxiliary feederswill pass around the grounded bridge to the next section be-yond. On each anchor bridge one auxiliary feeder isbroken by a strain insulator, and connections are madethrough circuit breakers to the bus-bar. The other auxiliaryfeeder is carried directly through, and a single tap connec-tion is made from the feeder through the circuit breaker tothe bus-bar. Upon the next bridge these conditions arereversed, so that each auxiliary feeder is divided into 4-milesections. This arrangement provides a maximum flexibilityof control. sulators like Fig. 11 are inserted in the catenary cables sup-porting the diverging wire between parallel tracks. Thediverging trolley wire is connected to the

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