American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 362
ohms. These relays and high resistances are tapped on to the main cir-cuits as shown at t, t. The strips of the switch h are pivoted in the center and are mechanically joinedtogether by the insulating strip x. As shown in the figure, the receiver wr is tapp**^on to the eastern wire; pr to the… … y^- presence of the instruments pr and wr is not noticeable in the main circuit, but suffi-cient current is diverted from the main line to operate those highly sensitive relays. pr is furnished with a local circuit and sounder and when the speed of trans-mission is sufficiently slow the signals are…
Telegraph
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