File:Bell telephone magazine (1922) (14752873301).jpg

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Description
English:

Identifier: bellvol25telephonemag00amerrich (find matches)
Title: Bell telephone magazine
Year: 1922 (1920s)
Authors: American Telephone and Telegraph Company American Telephone and Telegraph Company. Information Dept
Subjects: Telephone
Publisher: (New York, American Telephone and Telegraph Co., etc.)
Contributing Library: Prelinger Library
Digitizing Sponsor: Internet Archive

View Book Page: Book Viewer
About This Book: Catalog Entry
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Text Appearing Before Image:
ch of two weeks duration,are respectively: for those field peo-ple who are actively engaged in plac-ing and maintaining cable under pres-sure; for those directly concerned with the supervision of gas pressurework; and for those engaged in engi-neering gas pressure systems. The apparatus illustrating be-havior of gas pressure in a cable wasmade up into several portable ex-hibits which traveled all over thecountry. This apparatus and thefour training courses have broughtthe facts about gas pressure to hun-dreds of Bell System employees—tothose in the Long Lines who havehad the job of keeping an eye on thatDepartments 18,000 miles of sheath,and to Associated Company peoplewho are engaged in the installationand maintenance of toll cables. The protection to service affordedby gas pressure is becoming increas-ingly important with the introduction,In the last few years, of K-Carriersystems in existing voice frequencycables, whereby twelve telephone cir-cuits are superimposed on one pair of
Text Appearing After Image:
A lectnre-demonstratioii in the fields part of a traDiing prograni to keep maijitcnmiceand supervisory personnel posted on methods and developmejits of gas pressure testing 1946 Damaged Telephone Cables Send Their Own Alarms 173

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27 July 2014

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This image was originally posted to Flickr by Internet Archive Book Images at https://flickr.com/photos/126377022@N07/14752873301. It was reviewed on 18 September 2015 by FlickreviewR and was confirmed to be licensed under the terms of the No known copyright restrictions.

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