Telegraph engineering : a manual for practicing telegraph engineers and engineering students (1922)
Hausmann, Erich, 1886- · New York : D. Van Nostrand Company · leaf 106
right toward the left, a current of3 units will flow through the artificial Hne circuit at theleft and a current of i unit will flow through the artificialline circuit at the right. It will be seen that the relaysP and R respond, thereby operating sounders 6*2 and S\ In the same manner, the… … WG Fig. 3. traversing the various relay coils can be determined in theusual manner. The main-circuit connections of one station of a quad-ruplex circuit, using the Field key system with a singlegenerator instead of the battery, are shown in Fig. 3. Thefunction of the pole-changer C is the reversal…
Telegraph
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