Telegraph engineering : a manual for practicing telegraph engineers and engineering students (1922)
Hausmann, Erich, 1886- · New York : D. Van Nostrand Company · leaf 76
Fig. II. when operated by generators. The armature moves be-tween two contacts, one being connected to the positiveterminal of one generator and the other contact to thenegative terminal of another similar generator, the two DUPLEX TELEGRAPHY 6i other generator terminals being grounded as shown… … ^G Fig. 12. current to other duplex circuits, by connecting these cir-cuits, each with protective fuses,/,/,/, to the positive andnegative bus-bars. This figure shows the transmitting arrangement used bythe Postal Telegraph-Cable Company. At the instant oftransferring contact from one stud to the…
Telegraph
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