File:The Street railway journal (1905) (14757839351).jpg

Identifier: streetrailwayj251905newy (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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a reinforcement of the cross sectionor conductivity of the line. The outside wire, having a some-what greater sag, is less likely to break, and will therefore con-stitute a safety suspension for the inside wire in case the lattershould break near a support, it being then held above theground by the interconnecting links just mentioned. The sameprinciple of mutual safety suspension has been adopted forroad crossings of small importance (Fig. 6). You will alsofind two different forms of inverted catenary suspension,which have so far given excellent results (Figs. 4 and 5). Thissuspension has been used on about 5/4 km of length. Duringthese last days, when the weather was very cold, the trolley orcontact wire supported on these catenaries was so straight thatthe current collector showed no appreciable up and down mo- 648 Street railway journal. (Vol. XXV. No. 14. tion. We have, however, come to tlie conckision that this sus-pension, though it costs only about Frs. 200 per kilometer more
Text Appearing After Image:
FIG. SPECIMEN OF -INVERTED CATENARY SUSPENSION the wires in case it breaks and to prevent the ends from reach-ings the ground. Fig. 7 shows a more elaborate form of roadcrossing. In this case there is placed over the road and underthe wire a bridging structure made of angle iron which serves •> I:

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