The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 227
202 PRACTICAL TELEPHONE HANDBOOK teners turned to release the strip, and it can then be drawnout behind. In a large exchange the weight of cable to belifted may be very great, and a special cable lifter isthen used for the purpose. This consists of an upright … 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.
Telephone
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