American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 349
pulsations set upby the transmitter, records them in ink, on stiff papertape, as dots and dashes. THE PEEFORATOR. The perforator is shown, as a whole, in Fig.221. It consists essentially of a set of five metaltubes, or j^unches, each moving within a closefitting case, or guide, and which are… … J 2 5 THE PERFORATOR, TOP VIEW. The hollow punches, at to be perforated is caused to pass, as seen in Fig. 221, close to the edges. The inner ends of the punches are adjacent to three rods or levers, which connectwith three keys or discs, i, 2 and 3, Fig. 221, which latter are j^laced in a…
Telegraph
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