Telegraph engineering : a manual for practicing telegraph engineers and engineering students (1922)
Hausmann, Erich, 1886- · New York : D. Van Nostrand Company · leaf 161
duplex repeater set about 33 inches of table length. The location of the apparatus of a Western Unionquadruplex set on this table is generally as indicated in 146 TELEGRAPH ENGINEERING the figure, the upper shelf being reserved for signallingpurposes. The unit-section instrument tables used by… … y XsEND, /O. ^EY,s^ ; ,^REC. Xy^ ~P, RETARDATION COILS -22 in.- -^ Fig. 9. Attendants constantly oversee the operation of suchduplex, quadruplex and repeating apparatus, each attend-ant having supervision of a certain number of sets. 6. Power Switchboards. — A switchboard for a tele-graph power…
Telegraph
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
