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Description
First wire recorder for telephone, ca 1906. Made by Aktielselskabet Dansk Telegrafonfabrik, Kjobenhavn [Copenhagen], serial no.80, with leather belts [broken]. Danish engineer Valdemar Poulsen (1869 -- 1942) developed the first magnetic wire recorder in 1899. An article in The Electrical Magazine (July 1904, pp. 54-56) illustrates how the telegraphone operates.
Type
image
Identifier
9429A3BB-B5EE-41B0-9752-721417312106 2011-47-1
Subject
Telegraphone Magnetic wire recorder Aktielselskabet Dansk Telegrafonfabrik Poulsen, Valdemar
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