American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 199
ich is opened, and the sounder s, which remainsclosed. THE WEINY REPEATER. This repeater is shown in Eig. 138. The opposite transmitter is kept closed atthe repeating station by the action of an extra magnet added to the main line relays,the construction and operation of which are, briefly, as… … FIG. 138.—THE WEINY REPEATER. When, however, one of these extra coils is opened the current in the other coil mag-netizes the core. The wire which is joined to both coils of the extra magnet goesdirectly to the positive pole of the opposite local battery. The other end of eachcoil passes to the…
Telegraph
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