American telephone practice (1905) (14776278293)

Identifier: americantelepho00mill (find matches)

Title: American telephone practice

Year: 1905 (1900s)

Authors: Miller, Kempster B. (from old catalog)

Subjects:

Publisher:

Contributing Library: The Library of Congress

Digitizing Sponsor: The Library of Congress

Text Appearing Before Image:

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Text Appearing After Image:

6C6 CENTRAL OFFICE EQUIPMENTS. 667 Such construction is well shown in Figs. 478 to 481, inclusive,these being views of the terminal room in one of the large offices ofthe Keystone Telephone Company, of Philadelphia, Pa. This workis that of the Kellogg Switch-Board and Supply Company. Fig. 478 shows a view of the terminal (line and switch-board) sideof the main distributing frame. The charging machines, powerswitch-board and wire chiefs desk are also plainly shown. Fig.479 is a view taken in the opposite direction from that of Fig. 478,showing the jumper side of the main frame and the relay side of therelay rack. The other side of the relay rack, upon which all wiringis done, is shown in Fig. 480, this view showing on the right thejumper side of the intermediate frame. The general overhead construction is shown quite clearly in Fig.481, which is a view of the tops of the main frame, relay rack andintermediate frame. In all modern common battery multiple systems the main bodyof cables l

1905 in philadelphia american telephone practice 1905 distribution frames telephone exchanges in the united states book illustrations high resolution images from internet archive library of congress pennsylvania philadelphia

1905

Library of Congress

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