Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems (1921)
Smith, Arthur Bessey, b. 1875, Campbell, Wilson Lee · New York : McGraw-Hill · leaf 273
n.i.u.iiiij … Fig. 217. :: .■ ^ »«i>n -ft&Sl BgjSSjjIffi w/^^^^ -^^ShB^s iS? ^^mibI ^^ Fig. 218. THE SYSTEM OF THE WESTERN ELECTRIC COMPANY 251 A general view of selector frames installed is shown in Fig. 216. Thecabling is carried overhead on runways. No attempt is made to coverany part of the mechanism…
Telephone
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