American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 224
ent magnet, will be south poles; that is, during the time is flowing through its coils. The term maccnetizinsdifferential that no magnetizing current current is used here, advisedly, because of the fact that, in a differential relay,the current does not magnetize the core until an excess of current… … W. U. POLARIZED RELAY. tween the two ends of em, will be attracted equally by both ends, since a southpole on each side is pulling with equaf strength, at a north pole. But, if the armature be placed nearer one* pole face of em than the other, itwill be held towards that face, or end. Consequently,…
Telegraph
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