Image from page 103 of “The Bell System technical journal” (1922) – Manila Picture

Identifier: bellsystemtechni20amerrich
Title: The Bell System technical journal
Year: 1922 (1920s)
Authors: American Telephone and Telegraph Company
Subjects: Telecommunication Electric engineering Communication Electronics Science Technology
Publisher: [Short Hills, N.J., etc., American Telephone and Telegraph Co.]
Contributing Library: Prelinger Library
Digitizing Sponsor: Internet Archive

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Text Appearing Before Image:
Fig. 1—Paper strip insulating machine but the very finest insulating papers and that as high as 80% wood and 20%manila rope could be used for the coarser wrapping papers. In spite of these changes and the improved paper making techniquedeveloped by the industry the use of paper x .0025 for insulating 26-gauge wire was not entirely satisfactory from a manufacturing point ofview. About 1920 some of our engineers began developing the idea ofmanufacturing the paper right on the wire. If this were possible there 84 BELL SYSTEM TECHNICAL JOURNAL seemed to be no reason electrically why wood pulp would not make a suit-able insulating material, and from the mechanical standpoint many of thedifficulties involved in wrapping the insulation would be eliminated.

Text Appearing After Image:
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Tagged: , bookid:bellsystemtechni20amerrich , bookyear:1922 , bookdecade:1920 , bookcentury:1900 , bookauthor:American_Telephone_and_Telegraph_Company , booksubject:Telecommunication , booksubject:Electric_engineering , booksubject:Communication , booksubject:Electronics , booksubject:Science , booksubject:Technology , bookpublisher:_Short_Hills__N_J___etc___American_Telephone_and_Telegraph_Co__ , bookcontributor:Prelinger_Library , booksponsor:Internet_Archive , bookleafnumber:103 , bookcollection:prelinger_library , bookcollection:additional_collections , bookcollection:americana , BHL Collection

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