The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 252
the operator, and gives a greater area on theupright portion for the multiple and other jacks. In order to provide for the long connecting cords requiredfor such large exchanges, the sections are fitted with a specialpulley arrangement, shown in Fig. 248. From the plug thecord passes through the… … V ^ SE.CT8QJSSFig. 248.— Scale * 228 PRACTICAL TELEPHONE HANDBOOK cord then rises and passes over a pulley fixed under theframe, then down again under the second pulley of the pulleyweight, and finally it passes upward through a hole in thecord-fastener shelf to the fasteners. This…
Telephone
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