. Electric railway gazette . ssuperiority. The Johns square and adjustable insulatedtrolley crossings are also used exclusively. The light-ning arresters are of both General Electric and Westing-house makes. Each trolley line is entirely separate and distinct fromevery other, though by throwing the proper switchesthey could all be joined together. Further, each line isdivided into sections averaging 2300 to 2600 feet inlength ; in the lines first equipped the sections were3300 feet. The feeding points are all at the ends of thesections, at the section insulators ; each feeder dividingat the se
. Electric railway gazette . ssuperiority. The Johns square and adjustable insulatedtrolley crossings are also used exclusively. The light-ning arresters are of both General Electric and Westing-house makes. Each trolley line is entirely separate and distinct fromevery other, though by throwing the proper switchesthey could all be joined together. Further, each line isdivided into sections averaging 2300 to 2600 feet inlength ; in the lines first equipped the sections were3300 feet. The feeding points are all at the ends of thesections, at the section insulators ; each feeder dividingat the section insulator and feeding both ways from section insulator is carried on a pair of feeder spanwires of No. 0 copper, to which are fastened the brassends of the insulator. The feed-spans are run down the 398 ELECTRIC RAILWAY GAZETTE. Vol. XIII. No. 22. pole into the section-box, each through its own fuse-block and single-pole switch in the box, and are thenjoined together and to the feeder wire that brings the FEEDER. FEED £PaN Wlf^ current to that point. By this means the trolley wire ismade practically continuous, when both switches areclosed, and its conductivity throughout its whole lengthis added to that of the feeder system that supplies order to completely throw out a section one switchhas to be opened at each end of it. A diagram of theconnections at a section box is given in Fig. 7. Aside from accidents due to the falling of foreignwires upon the trolley, the most frequent point of break-age is at a sectional insulator, particularly if the insula-tor and the trolley wheel do not work together construction the precaution was taken to attachstrain-ears to the trolley wire at the spans adjacent tothe feed-spans, on both sides, and to guy them towardthe feed span, so that in case of a break they hold theline and prevent undue strain on the other hangers andspan-wires. With certain kinds of section insulatorsthis system of strain-guys is an ab
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1895
