Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 19
circuit from Nevada toWyoming, and divides between the branches at each end as per the diagram. It willbe seen that the differential polar relay at each station has a current of 57 milliamperesin one winding and 27 milliamperes in the other. The control of the armature, in eachcase, is due to the… … MLLINE WIRE = I550 HgKvw r@- c^=e>ov Fig. 6
Telegraph
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