American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 501
FIG. 317. … PHELPS MOTOR PRINTER. 425 FIG 318. t^ opposite the dog, (Fig. 314) has arrived at and dropped into one of the niches / on theside of wheel h, which at once compels the latter wheel into rotation with w, when it isagain ready to perform its part in the transmission of another letter. (In Fig. 315the…
Telegraph
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