. The Street railway journal . The trolley, a, is a hardcopper wire of section (No. 000) supported atintervals of 3 m (10 ft.) with mechanical clips, b (shownin detail in Fig. 3), which are fastened to an auxiliarycarrier wire, c, placed above the trolley wire and practicallyparallel to it. The clips grip the trolley wire but have alongitudinal movement along the auxiliary carrier wire. rangement is somewhat modified, as the wires are undertension only. Means are provided at definite intervals onall three wires to allow for the effect of changes in temper-ature. The advantages claim
. The Street railway journal . The trolley, a, is a hardcopper wire of section (No. 000) supported atintervals of 3 m (10 ft.) with mechanical clips, b (shownin detail in Fig. 3), which are fastened to an auxiliarycarrier wire, c, placed above the trolley wire and practicallyparallel to it. The clips grip the trolley wire but have alongitudinal movement along the auxiliary carrier wire. rangement is somewhat modified, as the wires are undertension only. Means are provided at definite intervals onall three wires to allow for the effect of changes in temper-ature. The advantages claimed for the multiple catenary over thesingle catenary are as follows : The number of perpendicularsupporting wires is only half of what it would otherwisebe, affording considerable improvement in the appearance ofthe line and simpler and easier maintenance of the entire April 6, 1907.] STREET RAILWAY JOURNAL. 583 overhead construction; the use of sHding clamps betweenthe trolley wire and auxiliary carrier permits easy and auto-. FIG. 3.—CLIP BETWEEN TROLLEY AND CARRIER WIRE matic equalization of the tension on the former after theline has been installed, and hence less wear. This advantage gaysyTgrT^s^ffg^i
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
