Identifier: belltelephonemag4344amerrich (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

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a nuclear explosion andprotect the vision of U.S. airmen againstflash blindness. The goggles employ a colloidal mixture ofgraphite suspended in a fluid, which is storedin a reservoir above the double lenses. Whenan intense flash occurs which threatensserious eye damage, it is detected by a photosensor in the airmans helmet. The sensortriggers a pencil-sized explosive, which pro-pels the opaque mixture into a narrow gapbetween the front and rear lens plates of thegoggles. The graphite covers the lens in thefew microseconds before the light has timeto damage a pilots eyes—in less time thanit takes to wink. After the danger has passed,the blackened goggles can be replaced withclear ones. The unique device works by means of asystem designed and developed at the SandiaCorporation, a subsidiary of the Western Elec-tric Company, which has an important rolein Americas nuclear defenses. Sandia—withscientific laboratories and facilities at Albu-querque, N.M. and Livermore, Calif.—con- 59
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Airman denionstrales new goggles designedto protect eyesight from a nuclear flash. ducts special projects for the Atomic EnergyCommission under a non-profit contract, andwas asked to work on the eye protectionsystem because of its experience in develop-ing explosive devices. and the film negative then can be used tomake, by conventional techniques, a plate forsubsequent printing. The system is considerably more flexiblethan any other way of setting type. In othermethods of type setting, type faces are storedas shapes on metal, glass or film. To changestyles, it is necessary to manipulate metalforms, glass wheels or strips of film. In thenew Bell Laboratories system, the type facesare stored in digital form. To change typefaces, only the program instruction must bechanged. A change could be made quickly,for example, from English to Chinesecharacters. The new system has been implemented atBell Laboratories in an experimental set-upthat includes a digital logic network, a cath-ode ray tu

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