File:Bell telephone magazine (1922) (14752959191).jpg

Identifier: belltelephonevol3132mag00amerrich (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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. Once the productsare in service, field per-formances must be stud-ied. All this has to bedone for every item. In studying the prob-lem of substitutions, thetask is approached fromthe standpoint of howthe metal is employedin the telephone system.The use of nickel di-vides quite naturallyinto a number of cate-gories. The largestuses of nickel are inmagnetic alloys, in nickel silver, inelectroplating, and in purchased alloyforms. Of these categories, the BellSystem uses more nickel by far in spe-cial purpose magnetic alloys than inany other. MAGNETIC ALLOYS Estimated savings for IQ52:^y1,000 pounds of nickel Approximately 60 per cent of thenickel the Bell System needs for1952 will be used in magnetic alloys—a total poundage of nickel amount-ing to more than 1,100,000 pounds. Much of it will be used in loadingcoils, which are placed in circuits toaid transmission. But much morenickel would be required if it werentfor the fact that loading coil coreshave been the subject of intense re-
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like this is processed in Western ElectricsNearly one-third of the nickel conteiit of alland magnetic alloys used curroitly by Electric is recoveredfro?n its own scrap search and study for many years.Starting as long ago as 1941, someloading coils were redesigned to useonly half as much Permalloy in theircores as before. In the interveningyears, improvements have been madesteadily in the uses of Permalloy.The result has been that in 195 i al-most two and one-half times as manyloading coils were produced perpound of nickel as in 1940. Of the 371,000 pounds of nickelwhich will not be used in magneticalloys in 1952, 276,000 pounds arebeing saved by the use of silicon steelfor Permalloy in the cores of sometransformers, retardation and re-peating coils, and also in the HA-1receiver pole pieces. Another size-able saving of 89,000 pounds is re-sulting from the use of magnetic iron 164 Bell Telephone Magazine AUTUMN for Permalloy in two types of ringercores. NICKEL SILVER Estimated savings f

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