American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 577
466 AMERICAN TELEGRAPHY, … fire alarm telegraphy. 467 Automatic Fire Alarm Telegraphy. In many of the large cities of tlie United States an auxiliary to the regular firealarm system is to be found in the use of automatic fire alarm telegraph apparatus, whichon the occurrence of fire in a building transmits a signal to a…
Telegraph
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