The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 226
tch-board. The fastener clampsfour jack-strips, being fittedat the point where the fourcorners meet. By means ofa slot in the end of theshank, the plate can beturned from the front, and acorner of a strip is releasedwhen the fastener is turnedso that the open quadrantcorresponds with it. Cable… … 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
Telephone
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