The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 295
268 PRACTICAL TELEPHONE HANDBOOK Eig. 275, copied from the American Telephone Journal, showsthe stamping mechanism, which is very ingenious, and has … POI/NTER SHAFT Fig. 275 proved of much service. Its working will be readily under-stood from the above description. See also Chapter XXX. for modifications of above systemsand later improvements in trunk-line working. CHAPTER XX PARTY-LINE WORKING Tn order to lessen the subscription rate to those…
Telephone
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