. Electrical world. FIG. 2.—ELASTIC CENTERED C.\BLE. the strain; high conductivity to reduce to a minimum the area ex-posed to wind pressure, high ductility to reduce the possibility ofthe strands breaking at the ties, and also that each length of cableshould be made without splices in the strands to maintain an eventemper and elongation; while the cable should be made in lengthsas great as could be conveniently handled on the ground, and sodesigned that the strain should be evenly distributed between theconstituent strands—each strand carrying its own portion of theload. A series of experimen
. Electrical world. FIG. 2.—ELASTIC CENTERED C.\BLE. the strain; high conductivity to reduce to a minimum the area ex-posed to wind pressure, high ductility to reduce the possibility ofthe strands breaking at the ties, and also that each length of cableshould be made without splices in the strands to maintain an eventemper and elongation; while the cable should be made in lengthsas great as could be conveniently handled on the ground, and sodesigned that the strain should be evenly distributed between theconstituent strands—each strand carrying its own portion of theload. A series of experiments demonstrated that while the ordinary. the wood is made by rivets holding large washers; the wood, beinghickory, does not split easily, and there is no chance for a and uncoupling is done very quickly, and when in theduct there is no slack between joints, nor can they possibly uncouple,although they will lend themselves to moderate bends. In weight they are light, and long runs can easily be handled byone man. The standard lengths are three and four feet. The rodsare easily handled in manholes, quickly jointed and unjointed, and PIC OF EL.\STIC CENTERED C.\BLE. concentric laid cable did not meet these requirements, the cable de-signed by Mr. Clark met the conditions in a satisfactory manner. °The wires composing the cable receive a special treatment, bothwhile the rod is being rolled and while the wire is being drawn. Tosecure a high elastic limit without sacrificing ductility and conduct-ivity the cable is laid up of six wires around a soft compressible May 28, 1904. ELECTRICAL WORLD and ENGINEER
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
