American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 569
from the path of a, allowingw to rotate, thereby opening all of the circuits at c, /, etc.; and reel r startsto feed out the paper tape. The local circuit of magnet m is connected to the back contact and to the leversof all of the relays, so that, normally, it is open. When, however, a signal is… … SPEICHER FIRE ALARM SYSTEM. 459 ently the relay e^ is closed again, thus opening local circuit of m and at once arrestingthe motion of the mechanism. Thus, almost concurrently with the first break of cir-cuit No. 3, all of the other circuits are broken at c/, and, in quick seccession (at tlierate…
Telegraph
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