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Image from page 19 of "Bell telephone magazine" (1922) | by Internet Archive Book Images
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Image from page 19 of "Bell telephone magazine" (1922)

Identifier: belltelephonevol21mag00amerrich

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


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About This Book: Catalog Entry

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Text Appearing Before Image:

WARNING DISTRICT CENTER ®3 NFORMATIONCENTER OperationsBoard ^ Operotions Officers Civil Air RaidWarning Switchboard -4 CIVILIAN ACTION Other Information CentersAir FieldsInterceptor Plones in FlightAir Corps HeodqVrsOther HeodqtVsArmy, Navy, Coast GuardAnti-Aircraft Stations , To Other District Control Centers To Other WarnirjgDistrict Centers LOCAL CONTROLCENTER


Text Appearing After Image:

CIVILAfR DEFENSE Alarms Defense Organizations Civil Institutions: Hospitals, Schools,etc.Police and Fire Depts.UtilitiesRailroadsManufacturing Plants DAMAGE CONTROLRescue, Medical ond Decontominotion Services, Highway, Police and Fire Department$,Utilities Telephone Lines and Air Defense Only the upper portion of this diagram represents military activity. The lower part shows how the telephone serves Civilian Defense as well 19^2 Telephone Lines and Air Defense scheme. It has been brought intoexistence because, instead of necessi-tating a constant patrol in the air, itis an effective method of interceptionwhile conserving the air forces avail-able. 1 HIS plan of air defense was not de-vised over night. The idea of the ci-vilian ground observer system wasconceived a decade ago, and has beentried out, with the cooperation ofthe telephone companies, in succes-sive maneuvers since its inception.Early experiments were crude, buteach test brought improvements andrefinements.* Today, upon th


Note About Images

Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.

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Taken circa 1922