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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 88

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 88
50.—Connections of.i-Ltrji.iiKil switcli. nections are shown in Fig. 50, and it is noteworthy thatthe lever, when moved, points to a disconnected terminaland that three pairs are formed with one of the disconnectedterminals intervening. … -4-!ino peg swit The Universal sioUcli—sometimes also termed the pcfj com-tnulatov—enables us to connect any one line joined thereonto any other of the lines. Four sets of metal rods or brassbars (Fig. 57) insulated from each other are fixed at rightangles ; holes are drilled through both sets, so…

Telegraph

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

More pictures 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

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