American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 565
by a multiple pen register; one pen being provided for each circuit. In this system a manual repeater is used in the central office for the purpose of re-peatmg the signals received on any one circuit over all of the others. This repeater is shown, theoretically, in Figs. 340, 341, and 342. It…
Telegraph
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
