Telegraph engineering : a manual for practicing telegraph engineers and engineering students (1922)
Hausmann, Erich, 1886- · New York : D. Van Nostrand Company · leaf 134
Fig. 7. result. Automatic devices, termed unison devices, are availedof to bring the tickers back into step whenever desired. … Fig. 8. Generators are now more frequently employed in theoperation of ticker systems than batteries, the generator I20 TELEGRAPH ENGINEERING leads being provided with fuses and protective resistances.Condensers are also used in these systems for the elimina-tion of sparking at the transmitter…
Telegraph
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