Telegraph engineering : a manual for practicing telegraph engineers and engineering students (1922)
Hausmann, Erich, 1886- · New York : D. Van Nostrand Company · leaf 135
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… … It has 8 ohms resistance and requires about 0.65 amperefor operation. Figs. 8 and 9 show respectively the key-board and motor-driven transmitter used at the centralstation of a ticker system. The cost of ticker service isabout $20 per month. Fac-simile reproductions to full…
Telegraph
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