. BSTJ 1: 1. July 1922: Philadelphia-Pittsburgh Section of the New York-Chicago Cable. (Pilliod, James J.) . Fig. 12—Tractors Placing Cable Reels in Rough Country nearly 5,000 pounds, could possibly be used, and certainly no othermeans would have been as satisfactory. Even with these methodsthe cable reels could not always be delivered where desired and insome cases it was necessary to pull the sections of cable through therings for a distance of nearly a mile to get them in place. 72 BELL SYSTEM TECHNICAL JOURNAL Cable Make-Up As stated before, the make-up of the cable varies somewhat withthe
. BSTJ 1: 1. July 1922: Philadelphia-Pittsburgh Section of the New York-Chicago Cable. (Pilliod, James J.) . Fig. 12—Tractors Placing Cable Reels in Rough Country nearly 5,000 pounds, could possibly be used, and certainly no othermeans would have been as satisfactory. Even with these methodsthe cable reels could not always be delivered where desired and insome cases it was necessary to pull the sections of cable through therings for a distance of nearly a mile to get them in place. 72 BELL SYSTEM TECHNICAL JOURNAL Cable Make-Up As stated before, the make-up of the cable varies somewhat withthe circuit requirements in the different sections but the wires andarrangement in a typical section of cable are roughly illustrated inFig. Fig. 13 Piece of Cable with Sheath Partly Removed The cable is of quadded construction, that is, the wires are firstwrapped with dry paper for insulation and twisted into pairs and thentwo pairs are twisted into what is called a quad. These quads are NEW YORK-CHICAGO CABLE 73 arranged in concentric layers as shown and great care and skill arerequired in the design and manufacture or there is certain to be seriouscross-talk between the several hundred circuits when used for long-distance service. Even after the application of the best present manu-facturing methods, tests are made on all circuits at three points ineach loading section of 6000 feet while the cable is being tests are made in order to determine the best possible arrange- Side Circuit I I
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttelepho, bookyear1922
