. Electric railway review . ables which support the coppertrolley conductor comprises an extra high strength steelcable, 9/16 inch in diameter, consisting of heavy strands. Thecable has an ultimate strength of 33,800 pounds. These cablesare strung between the bridges, with a sag at mean tempera-ture of 6 feet in a standard span of 300 feet. Main-Line Insulators. The insulating supports for the catenary cables on theIntermediate bridges consist of heavy porcelain insulatorsof the skirt type, which are 15 inches in diameter and about7 inches high. The catenary cable rests in a groove in thetop o
. Electric railway review . ables which support the coppertrolley conductor comprises an extra high strength steelcable, 9/16 inch in diameter, consisting of heavy strands. Thecable has an ultimate strength of 33,800 pounds. These cablesare strung between the bridges, with a sag at mean tempera-ture of 6 feet in a standard span of 300 feet. Main-Line Insulators. The insulating supports for the catenary cables on theIntermediate bridges consist of heavy porcelain insulatorsof the skirt type, which are 15 inches in diameter and about7 inches high. The catenary cable rests in a groove in thetop of the porcelain and is held by means of a malleable ironclamp fitted with U-bolts and placed one on each side of theinsulator. The head of the insulator is conical in shape and issurrounded by means of a split malleable iron clamp and alead packing. The construction of the clamp and the collar is such thatin case of the breakage of the messenger cable on one sideof the insulator, the pull of the cable on the other side will. New York New Haven & Hartford Electrification—Type ofElectric Locomotive Used. varying lengths. These hangers are so adjusted in lengththat the trolley wire is maintained in a horizontal position, itbeing G inches below_ the catenary cables at the middle pointof the span. Trolley Section-Break Insulators. At each anchor it is necessary to provide an insulator and a trolley wire. This is accomplished by means of two bronze end castings, to which the ends of the trolley wire are bolted. Two parallel sections of impregnated hard- ) ELECTRIC RAILWAY REVIEW Vol. XVIII, No. 7. wood are fastened to these castings, and to these woodenstrips are fastened renewable pieces of trolley wire in sucha manner that the ends of these renewable pieces overlap oneanother. By this means it is possible for the sliding contacton the locomotive to pass from one section to the next withoutopening the circuit, thus avoiding all flashing. A diverging trolley wire is conn
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