BSTJ 1: 1. July 1922: Philadelphia-Pittsburgh Section of the New York-Chicago Cable. (Pilliod, James J.) (1922)
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is necessaryto pull it to just the right tension in order that when the cable ishung it will have the proper sag. The correct tension is readilydetermined by what is known as the oscillation method. Themetal rings are spaced 16 inches apart and the cable weighs about7)4 pounds per foot. The size… … Fig. 6—Method of Supporting Aerial Cable and Messenger 2$4 in. which is about the maximum size of telephone cable. Thesheath is of lead-antimony alloy, one-eighth of an inch thick, andunder normal conditions it is, of course, air-tight to keep moisturefrom entering. The cable for the aerial section…
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