American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 238
are flowing through the respective coils of the relays in op-posite directions it is plain that the current available for producing the magnetic effecton the cores of those relays, nr and pr, is the excess of 5 over 4, namely i; and inthe cases of pis and nr the resulting.magnetic efi^ect is due to… … 200 AMERICAN TELEGRAPHY. of 4 to the right hand coils of nk and pr, at y. The transmitter t at y being openthe small portion of the battery mb is placed to the line; the long end of thatbattery being open. Thus a strength of but i passes to the artificial line r frommb and a similar current…
Telegraph
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