American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 503
ed inFig. 318. iw is an ink-roller which is held by means of its flexible support fs anda suitable spring against the types of tw. pl is a lever, the effect of whose operationis similar to that of the press lever of the ordinary stock printers. Normally the printing wheel pw is held at rest by… … When however the electro-magnet is closed for an instant it results that thedetent d is withdrawn from the spur. The printing wheel pw at once starts to rotate,but before it can move far the electro-magnet em is again demagnetized, and the de-tent D resumes its former position and engages with the…
Telegraph
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