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 376
any noise on talking circuits. As indicated, the batteries at each of the sub-offices may be chargedby means of the rectifiers at the main office through a rheostat placed inthe negative battery feeder of each sub-office. No positive batteryfeeder is provided, because the connection for the… … 110 V. Lamps,;-To BusuBusbar] J. °n Board --TOR J . }%%< to bust/1 -arm?l Harm?2Mach. Ammeter Voltmeter Fig. 283.—Typical power plant circuit. Battery, Ringing, and Tone Distribution Scheme.—In Fig. 284 is shown a power distribution scheme which should be studied in connectionwith Fig. 282. The…
Telephone
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