National Telegraphic Union · New York : N.T.U. · leaf 312
Fig. 1.(* _l_ B)—n_ Thus each station receives its signal throughthe action of the distant battery only. A third position occurs where one of the keys, at B forinstance, is in the act of changing from the front contacta to the rear contact c, in which case the current fromA is interrupted at b and… … * Schellens Elektromagnetischer Telegraph. Fig 2. rent arriving at B is considerably weakened, in conse-quence of the additional resistance encouutered at X, butthis is compensated for by its passiug through both wires of the relay M in the same direction, and its magneticaction, therefore, remains…
Telegraph
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