American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 62
in a change in the magnetic polar-ity of the field magnet, which change will, in turn, by reversing the direction of themagnetic lines of force in the field, reverse the direction of the current generated inthe armatures of the machines a, b,c, d; the direction of the current through e, ofcourse,… … 44 AMERICAN TELEGRAPHY. net circuit f is as indicated by the solid line arrows. With the plugs inserted at 3 and4,instead of at i and 2, the current in the field magnet circuit would flow as shownIjy the dotted line arrows. In Fig. 26 is shown, theoretically, the present arrang^-ment of th^…
Telegraph
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