Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1902)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 349
series ofarmature clicks separated by intervals of long or short dura-tion constitute the signals transmitted. A short intervalbetween clicks is called a dot, and a longer interval aBy different combinations of the dashes andan alphabet is constructed and words spelled from the signals received.The… … Telegraph Eelay. circuits are given in Fig. 301. When one of the stationssignals to another the third also receives the signal, sinceall the relays are in series. The function of the smallcut-out switch on the transmitter key is to preserve the con-tinuity of the line since it is in series with it,…
Electricity · Magnetism
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