Telegraph engineering : a manual for practicing telegraph engineers and engineering students (1922)
Hausmann, Erich, 1886- · New York : D. Van Nostrand Company · leaf 138
Fig. 12. ing system is a Wheatstone transmitter, or high-speed pole-changer, as described in § i. A front elevation of the upperportion of this transmitter is shown in Fig. 13, whereinmost of the letters refer to the same parts as in Fig. 3. … \ :^ Fig. 13. 124 TELEGRAPH ENGINEERING The pole-changer contacts are shown at k and ki, and con-nect respectively with the negative and positive terminalsof the generators. In operation the adjustment of therods / and h must be very precise, and is effected by thescrews e and e\ When the switch 5…
Telegraph
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