Handbook for the use of electricians in the operation and care of electrical machinery and apparatus of the U.S. seacoast defenses (1902)
United States. War Dept, Anderson, George Lucius, 1849-1934 · Washington, Govt. Print. Off. · leaf 183
173. No Central. 2. A common battery is a feature of modern systems. In fig. 174 each of theten lines is connected with 10-springs jacks on each of the ten telephones (threeshown). P is plugged to the No. of the station called, c and c are impedance 64TTCRVWI(!E … 174. Common Battery, 10 Stations. coils on either side of the transmitter circuit to prevent cross talk when morethan two stations communicate. a. The Holtzer-Cabot system is extensively used (fig. 175).
Electric machinery · Searchlights · Coast defenses
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