. The street railway review . d, extra heavy. For angle construction, the poles are not less than ,vSft. long and heavier at bntt and tip than the straightrun poles. The angle poles have double crossarms thor-oughly liraccd and lied together as shown in the draw-ing. On straight run work the wires arc carricil on LockeNo. 100 double petticoat porcelain insulators with gal-vanized iron pin which is cemented to the angle poles a special insulator is used, designed tobe carried iKtween the two crossarms and to give ex-tra strength. The pole locations for turning angles were all deter
. The street railway review . d, extra heavy. For angle construction, the poles are not less than ,vSft. long and heavier at bntt and tip than the straightrun poles. The angle poles have double crossarms thor-oughly liraccd and lied together as shown in the draw-ing. On straight run work the wires arc carricil on LockeNo. 100 double petticoat porcelain insulators with gal-vanized iron pin which is cemented to the angle poles a special insulator is used, designed tobe carried iKtween the two crossarms and to give ex-tra strength. The pole locations for turning angles were all deter-mined by a standard system, the idea being, when turn-ing angles, to have practically the same angle of strain at each individual situation. The scheme for the location of poles for all angles is reproduced Old Colony system .serves a large lunuber of villages, towns Piid independent nnniicipalilies and it therefore became necessary in a number of instances 10 c:uTy the high tension lines under- Ct-LlOT Srff£tT. i/l- OK III««le carried on the fourth pin When i: bccumes necessary toduplicate the Iransmisiion synlcni, two additional wirei will be placedon the second cro^narm and the two «cli Of wire* will then he ar-ranged in triangle. The line will not Ix- transposed either whencarried flat or in triangle, it having l)crn decided that transpositionsarc not necessary with a zj-cycle current at volts, and this groinKJ when (lassing through populated centers. As it became nec-essary lo do this in several (daces, it was thought best lo adopta standard design for a terminal house in which to locale discon-necting switches, lightning arresters, etc, at each point where thehigh tension wires enter or leave Ihc ground. The general ar-rangement of these houses will be understood from the drawings. 966 STREET RAILWAY REVIEW. (Vol. XIII, No. 12. All iiiulcrgrouiid cables were furnished by Ihe Standard Under-gruuiul Cable Co. and are carried in II. B.
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
