The practical telephone handbook and guide to the telephonic exchange (1906)
Poole, Joseph · New York, Macmillan Co. · leaf 305
al bars of four differentlengths. This form appears to be even more satisfactory thanthe one above described. 278 PRACTICAL TELEPHONE HANDBOOK The bells of the four stations are connected to the line asshunts, with condensers in series, as shown in Fig. 282. Theringing generator for the production… … « ^mnvin; Fig. 284 Kellogg C.B. system. A view of the latter key, with a listeningkey attached, is shown in Fig. 284. Indicating Party-Line Keys.—A rather important pointin the practical working of these selective systems in exchangesis that some arrangement should be provided to show theoperators…
Telephone
Internet Archive · Northeastern University Library · Public Domain Mark 1.0. Free to use for anything.
