Bell telephone magazine (1922) (14756462305)

Identifier: bellvol24telephonemag00amerrich (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: BayNet



Text Appearing Before Image:
e Brit-ain during the fateful German air of- fensive, hunting Nazi wolf-packs inthe Atlantic, curtailing the V-i men-ace, sinking Japanese shipping bothmerchant and naval—all have impli-cit in them not only the factors ofquality and quantity production butan intangible element more difficultto sample and appraise. It is thatelement in human behavior whichrises in behalf of a righteous causeand transforms an almost fleetingIdea into magnificent reality. Noother explanation accounts fully forthe radar achievement. In the decade from 1930 to 1940,aircraft were beginning to travel with Ci ^^ <^^^ 1 ^■H;l BoMb KBLe^se. ^ * ^^^^^^^^^^^^H IB^ ^ 1 «4A«eA. PA y - -^ ^^■■1 ^£W V J ^ 1 ^ Omr^T Q ~ TRAtK ^ fcOil^ 5<iALE .- LiNe. €S I^I^H O-^ ^f*Pi ^Sr wf^S^ fiMti.& ^ -^^ . 0^ ca ^ /MARKKA V* v- -% < When the target comes within range, airmen switch their p.p.i. scopes tosector scan (above) and bomb with the aid of electronic cross-hairs 258 Bell Telephone Magazine WINTER
Text Appearing After Image:
An aerial reconnaissance picture of the Japanese industrial city of Toyama, whichturned out large quantities of ball bearings, machine tools, textiles, and alloy steels speeds only half the velocity of sounditself, so that the warning intervalwhich could be achieved by listeningwas quite inadequate. A high-flyingairplane is difficult enough to detectvisually even under the best condi-tions; and to find its range by opticalmeans, the only pre-radar methodavailable, always proved troublesomeand often impossible. The accuracyof anti-aircraft fire suffered accord-ingly, and It appeared that a success-ful defense against hostile aircraft byfighters would require constant pa-trolling plus a generous measure ofplain luck. Radar made possible the timely alerting of all defenses. Fighterscould be scrambled, and thencoached to an advantageous contactwith the incoming raid. Anti-air-craft guns could be pointed automati-cally at unseen targets with greaterprecision than formerly characterizedthe