American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 196
When the transmitter t is closed its post p separates the tongue / fromthe lever L. This opens the western line at /; consequently, relay ris next openedand its armature falls on its back contact. This does not operate transmitter t, how-ever, as the local circuit of that instrument was opened, at^… … 162 . AMERICAN TELEGRAPHY. in the case of tlie other repeaters described, simply reversed, the transmitter t keepingT, passive, by the opening of the local circnit of the latter at x. The 3-point switches s s are used to put the repeaters through, or to separatethe sets. In the management of these…
Telegraph
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