Telegraph engineering : a manual for practicing telegraph engineers and engineering students (1922)
Hausmann, Erich, 1886- · New York : D. Van Nostrand Company · leaf 153
her section, insert plugs in holes c 1, c 2 and d 2,. Inorder to loop the two eastern wires together with or with-out intermediate set i, insert plugs respectively in holesb 2 and ^ 3 or in holes b 2 and d 2. For the accommodation of additional lines at inter-mediate or terminal offices, peg panels… … widely used panel. The insertion of a wedge, as shown,raises the shank away from the fixed shoe and introducesinto the line whatever apparatus is connected with thewedge cord. Single- and double-conductor wedges are usedfor various purposes, and more than one wedge may be in-serted in a spring…
Telegraph
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