Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 347
sual means are provided, the operation of a ringing key would, bycutting off the other portions of the cord circuit, cut off all batteryfrom the line, and thus allow the de-energization of the cut-off relay.This would then be under the influence of the ringing cord, with theresult that its armature… … ij iu TO BA,T-rflFlY- FIG. 270.—COMPLETE KELLOGG CORD CIRCUIT. connected with the ungrounded terminal of the common battery, sothat, although the original connection with the battery is broken bythe operation of ringing, it is at once re-established by the back con-tact of this key when thrown in…
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