Handbook for the use of electricians in the operation and care of electrical machinery and apparatus of the U. S. seacoast defenses .. (1904)
United States. War Dept · Washington, Govt. print. off. · leaf 186
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). Pis plugged to the No. of the station called, c and c are impedance BiTTCnv wrnE … 174. Common Battery, 10 Stations. coils on either side of the transmitter circuit to prevent cross talk when morethan two stations communicate. 3. The Holtzer-Cabot system is extensively used (fig. 175). ^ i.i
Electric machinery · Searchlights · Coast defenses
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer04inte-129-43.webp)
