The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 383
nnected forleading in. Jointing.—For-merly all joints inline wires were com-pleted by soldering,as it was consideredthat our damp clim-ate would not allowof the use of themechanically twisted sleeve joints used in America, andgenerally known as Mclntire joints. Experiments carriedout by the… … Fig. 351.—Plan (Scale J) Pooles ExtensionStraps AERIAL LINE CONSTRUCTION 355 The joints are made by means of flattened soft copper tubesof three different sizes, 2J, 3 and 5 inches long for 40-lb. bronzeand 100 and 150 lbs. copper wires respectively. A sleeve is slipped on the ends of the wires to…
Telephone
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