American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 587
indicator is described in connection with the Gamewell fire alarm telegraph.AUTOMAiic TRANSMITTER, OR MULTIPLE BREAK-WHEEL.—The general principle ofthe multiple break-wheel or transmitter, will be readily understood by reference toFig. 354j ill whinh p is the pointer and l the crank lever seen in… … GAMEWELL CENTRAL OFFICE.—STABLE ELECTRICAL CONNECTIONS. quently, as the pointer is moved around, the break-wheel is turned with it. The break-wheel consists of concave strips of metal, on the outer edge of which, teeth correspond-ing in number and arrangement to the numbers of the signal boxes, are…
Telegraph
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