American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 354
2,02 AMERICAN TELEGRAPHY. ence of D2 as compared with Dj ; while the large circumference of d^ as compared withthat of the siuface at which it gears, by friction, with d, gives the latter a comparativelyrapid motion. When d^ is moved to the left so that it assumes the ];osition indicated inFig,…
Telegraph
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