American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 564
orkin such a way tliat it makes butone revolution while the break-wheel makfs four. Thus, at eachalarm,* the Ijox number is trans-mitted to the central oflfice fourtimes. At the end of its revolutionthe rod r is again held by the lever K. When lever k is pulled downthe gong-magnet m is… … GAYNOR FIRE ALARM STREET BOX. 454 AMERICAN TELEGRAPHY. FIG. 339 ^^zm The pointer i on dial d turns i point with each round sent in, and thus indicates thetotal number of alarms sent in and shows the inspector at a glance whether or not thespring needs re-winding. The spring is wound by means of the…
Telegraph
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