Telegraph engineering : a manual for practicing telegraph engineers and engineering students (1922)
Hausmann, Erich, 1886- · New York : D. Van Nostrand Company · leaf 225
atedonly by the first round ofsignals. Such indicators aredesigned for showing eitherthree or four digits, each digitbeing brought into view by awheel bearing the numbersfrom I to 9 on its periphery.The mechanism is of the step-by-step type, and is manuallyrestored by the pulling of acord. Both… … Fig. 13. MUNICIPAL TELEGRAPHS 211 ink marks or perforations in paper tapes. Fig. 14 showsa punching register, paper take-up reel and an automatictime and date stamp which prints on the register tape theexact time that alarms are received. With systems having manual central stations and em-ploying…
Telegraph
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