American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 270
evers areemployed, as outlined in Fig. 182a. pc and t (opposite pagt^. The inductorium ic and extra coil em are also being re-placed with a modification, due to C. E. Diehl, Fig. 1826, of the Edison repeating sounder device (page 202). In Fig.182&, NR is the Jones neutral relay, coil eM of… … and 200-olmi resistance, at which times relay rs and consequently sounder s are open. When the lever of xr is on itsfront stop, shunt circuit a a is open at c, and curient passes through coil of rs, nuignetizing it. and attracting its arm-ature, closing circuit of s at x, whereupon s is magnetized.…
Telegraph
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