American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 203
hunt circuit of lb at the contact on lever of ^/. Xext,armature-lever l of t opens the eastern circuit at s, r . This opens relay R, whosearmature Y falls back, opening circuit of lb at x, but this does not open trans-mitter T, as local circuit lb has been previously closed at a. If East were… … __m-
Telegraph
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