American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 555
ers concurrently withthe first partial rotation of the shaft s; the mechanism for the operation of this cam itis not deemed requisite to show. In addition to the apparatus described in connection with this automatic repeater,an annunciator is so placed with regard to each relay that the opening of… … QVWVAAAAWVVVVVVVVVVVVVVVVWWWUAW NOX-INTERFERIXG STREET SIGNAL BOX. Fig. 332 is a theoretical diagram of a Gamewell fire alarm signal box, in whicha four round break-wheel and a non-interfering device are employed; there are also GAMEWELL NON-INTERFERING BOX. 445 shown in the same figure the…
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