American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 450
ion. When, therefore, it is only desired to send an ordinary service call, the pointerp is not moved, and the pulling of the crank lever k simply effects the turning in ofthe box number by the medium of the spring contact f and the breaks v v on thebreak-wheel. When it is desired to send in a… … 37^ AMERICAN TELEGRAPHY. contacts at h h, twice, but as those contacts are still short-circuited via/ and /, thecircuit is not affected. The pointer having been thus set, the crank lever is operat-ed, whereupon the break-wheel bw proceeds to make its revolution. In so doing itfirst sends in the box…
Telegraph
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