American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 240
202 AMERICAN TELEGRAPHY. Between each reversal of magnetisin, there is an interval when there is no magnet-ism in the core of the relays. At this moment of no magnetism the armature ofthe polarized relay simply retains its last position. When the armature of theneutral relay is on its back stop, it…
Telegraph
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