American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 575
announcing that the street box has been started; for aswe have seen, the buzzer z only acts as a buzzer, when the auxiliary circuit hasbeen broken by the break-wheel in the street box in the act of turning to transmit itsnumber over the main fire alarm circuit. This buzzer acts somewhat differently… … GAMEWELL AUXILIARY FIRE ALARM.—CONNECTIONS. The auxiliary circuit is not only broken at the lever / in SB by the projection fromthe break-wheel b\v, but the lever is also thrown by that projection to a point whereit remains until reset by some one duly authorized to open the street box. This,…
Telegraph
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