Telegraph engineering : a manual for practicing telegraph engineers and engineering students (1922)
Hausmann, Erich, 1886- · New York : D. Van Nostrand Company · leaf 159
ich repeater, duplex and quadruplexapparatus are located. Fig. 7 shows three units of aWestern Union distributing frame. The right or hori-zontal side has 8 horizontal strips which carry terminalblocks for connection, say, to office apparatus, while theleft or vertical side has 3 vertical strips… … Fig. 7. TELEGRAPH OFFICE EQUIPMENT — TRAFFIC 145 of wires and each vertical strip accommodates 100 pro-tectors. These connections to terminal clips and pro-tectors are permanent. Any desired connection may bemade between the different pieces of apparatus in theoffice, or between such apparatus and…
Telegraph
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