. Electric railway journal . Double insulation is provided for the en-tire suspension. Aside from its greater safety, the use of strap-iron stilts with one central insulator and two pull-offs. The catenary is attached to the irons caps of the pull-offs, and the latter, through their curved arms, are con-nected in turn to the iron cap of the central stilt insulators may be moved sidewise if illustrations show that two types of line constructionare used, namely, bridges in the stations and yards, andcenter-pole, double brackets in the open country. All polesand column
. Electric railway journal . Double insulation is provided for the en-tire suspension. Aside from its greater safety, the use of strap-iron stilts with one central insulator and two pull-offs. The catenary is attached to the irons caps of the pull-offs, and the latter, through their curved arms, are con-nected in turn to the iron cap of the central stilt insulators may be moved sidewise if illustrations show that two types of line constructionare used, namely, bridges in the stations and yards, andcenter-pole, double brackets in the open country. All polesand columns are either of channel or L-beams, and aregrounded to the rails with copper connections. Many ofthe poles are set in concrete, which could be placed onlywith the aid of iron box forms; in other cases the prev-alence of made land obliged the builders to extend arms ofthe concrete foundation even as far as the rails. As the catenary is made up of short wires, which extendonly from span to span, no special means were needed to. Scheveningen Single-Phase Railway—Automatic Device for Taking Up Variations in Tension of Trolley Wire 598 ELECTRIC RAILWAY JOURNAL. [Vol. XXXIV. No. 14. take up contraction and expansion. However, automatictension devices are provided for the contact wire at inter-vals of 3280 ft. in the form of weights, which are propor-tioned to keep this wire under a constant tension of 990lb. As the catenary, auxiliary and contact wires are brokenand overlap at these tension regulating points, the latterplaces also serve for the installation of section breakers.
Size: 3054px × 818px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
