American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 566
e, as shown in Fig. 342. By sliding the handle in one direction or another, the contact tongue is placed under any desired set of teeth on the cylinder. When the handle has been properly placed the clock-work is started, with the result that the box number corresponding to the set of . . teeth on…
Telegraph
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