File:Bell telephone magazine (1922) (14569346039).jpg

Identifier: bellvol25telephonemag00amerrich (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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followed the gleam ofthat rainbow, but none had found itsend. They could not; for, howevergreat may have been the contributionsof these earlier experimenters to theadvancement of the silent film, theycompletely lacked five essential ele-ments of the modern talking picture: 1. A high-quality microphone capa-ble of transmitting a wide rangeof sound frequencies without dis-tortion and of being used at adistance from the performer. 2. A non-distortive amplifier. 3. An electrical recorder and re-producer. 4. A loud-speaker of high qualityand adequate capacity. 5. A synchronizing system freefrom speed variation. As LATE AS 1912, the science of mod-ern electro-accoustics was yet unborn,and no efficient instrument for themeasurement of sound was available.It was in October of that year thatLee deForest, a former WesternElectric engineer who had left thecompany to pursue a career as an inde-pendent inventor in the field of wire-less, submitted to Dr. Frank B,Jewett—then assistant to Westerns
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Irving Lndt-rhill Thomas A. Edison working in his West Orange laboratory in igo^ on the problem of synchronizing sound and pictures I 1946 Twenty Years of Talking Movies 85 Chief Engineer, Charles E. Scribner—a little device which was to be ofmomentous importance to the BellSystem. It was the audion, whichwas ultimately to provide the solutionto the Systems problem of finding apracticable repeater for its longdistance circuits. The development of a satisfactoryrepeater was a primary objective oftelephone engineers in this countryand throughout the world. Out of itwould come the telephones final con-quest of distance on this earth. Sothere were hours of intense discussionamong deForest, Jewett, and E. H.Colpitts about such things as theaudions capabilities, the tests to which it had already been submitted, itsadaptability to commercial manufac-ture, the proprietary interests of cer-tain others in it, and similar prelimi-naries. Finally, it was agreed that theaudion should be tested b

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