Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 248
d respond l^v inserting the answering plug into theanswering jack corresponding to the annunciator, which act wouldestablish connection with the line and at the same time cut off thecircuit of the drop by opening the contact between the springand its anvil. The operator could then by means of her… … Fin. 20S.-COKn CIRCUIT FOR SERIES-MULTIPLE EO.VRD. at the same time keeping her listening key closed. If his line wasfree its test thimbles would have no ground connection, and therewould be no flow of current through the operators telephone set.She would therefore complete the connection.by…
Telephone
Internet Archive · Cornell University Library · Public Domain Mark 1.0. Free to use for anything.
