The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 227
Fig. 226—Full size frame shaped to fit against the back of the switch-board andfurnished with an upright screw, which, on being turned bybevel gearing driven by a handle, lifts up a long steel wedgeplaced between the cables and connected to a sliding box-nut fitted on the screw. … Fig. 226a.—Cable Forming Coble Forming.—In order to prevent waste of cable incutting off the lengths required for fitting it is now usual toform for cutting in the manner shown in Fig. 226a. Byadopting this method the waste is reduced to a minimum. Note.—For cost of multiple switch-boards see…
Telephone
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