Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 107
ar on the received printedcopy. 14. When the number of characters perforated reaches sixty-five, seven less than theallowable number on a line in the printer, a small lamp under the keyboard is lighted.This lamp is protected against breakage by a movable, perforated sheet metal guardand is lighted… … Page 7 Section 4-A Multiplex System 263-C through an idler gear mounted on a lever, with the twelve toothed pinion on the feedroll shaft. Thus whenever the feed roll moves the tape forward one space the indicatorrear also advances one tooth. 15. Mounted on the indicator gear is a pin, A, which…
Telegraph
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