American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 200
■h TU/W^ V ! J^^^^-W. \x … FIG. 138^7. — rilE IIORTON REPEATER. on its front contact point, which contact point controls the usual transmitter, as seenin the diagram. When, however, for example, the West wishes to send to the East,and, for that purpose, opens his key, and the relay R is thereby demagnetized, theextra magnet…
Telegraph
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