American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 351
s give the verticalrods L l a constant upward tendency, but their upward motion is checked by thepins p p on the rocking beam r. For example, when the right hand end of thebeam is making its upward motion the rod l follows the pin p upwardly. At thethe same time the rod h, by its collet, pushes… … ^|.|.|.j.|.|.p,5 WHEATSTONE TRANSMITTER THEORY. D by its arm m. This disc is formed of two metal segments which are separatedfrom each other by an insulating material. One of the segments is connected to theline, the other to the ground. A metal contact pin, i, 2, juts from each segment.Two crank…
Telegraph
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