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Elementary telegraphy : a manual for students; written specially to meet the requirements of the ordinary grade of the subject as published in the syllabus of the city and guilds of London Institute (1910)

Pendry, H. W. (Henry Walter) · London ; New York : Whittaker & Co. · leaf 204

An illustration from Elementary telegraphy : a manual for students; written specially to meet the requirements of the ordinary grade of the subject as published in the syllabus of the city and guilds of London Institute, 1910, leaf 204
per volt ofthe power used. The tongue of the relay (T terminal) is earthconnected, and the pole of a single earthed battery is joinedto the sounder coils. Each of the battery leads passesthrough a 1-ampere fuse before reaching the instrument. S.C. relay and sounder circuits have their… … li. 107 —Universal battery : S.C. u])stfitioii. For down statinn chaiigi!battery pole (U) and D of relayand falvanometer terminals. 194 ELEMENT A R Y TELEdEA EH Y sets, because only one pole of a single Ijatlery Is avail-able (either + or —), the other being earthed. The np

Telegraph

Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.

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