American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 261
atthe contact points, etc. e isan added resistance of1200 ohms. When the trans-mitter, 1, is closed, as inFig. 176, this resistance isshort-circuited by the shortwires i and 2, via the postp and tongue is of the trans-mitter. L is a resistance of900 ohms, termed the leak,between the lever of… … FIELD KEY SYSTEM. 219 FIG. 178. iSoo It smsimmsmir as those resistances are concerned, the full strength of the current goes to the mainand artificial lines. When t is open, however, r is put into the circuit and l is tappedon to the circuit, at j, via wire 2, as may be seen in Fig. 177. The object…
Telegraph
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