Definição do conceito
[ENG] Dictaphone was an American company founded by Alexander Graham Bell that produced dictation machines. It is now a division of Nuance Communications, based in Burlington, Massachusetts. | Although the name "Dictaphone" is a trademark, it has become genericized as a means to refer to any dictation machine. | The name "Dictaphone" was trademarked by the Columbia Graphophone Company in 1907, which soon became the leading manufacturer of such devices. This perpetuated the use of wax cylinders for voice recording, which had otherwise been eclipsed by disc-based technology. Dictaphone was spun off into a separate company in 1923 under the leadership of C. King Woodbridge | In 1947, having relied on wax-cylinder recording to the end of World War II, Dictaphone introduced its Dictabelt technology. This cut a mechanical groove into a Lexan plastic belt instead of a wax cylinder. The advantage of the Lexan belt was that recordings were permanent and admissible in court. Eventually IBM introduced a dictating machine using an erasable belt made of magnetic tape which enabled the user to correct dictation errors rather than marking errors on a paper tab. Dictaphone in turn added magnetic recording models while still selling the models recording on the Lexan belts. Machines based on magnetic tape recording were introduced in the late seventies, initially using the standard compact (or "C") cassette, but soon, in dictation machines, using mini-cassettes or microcassettes instead. The size of the cassette was important as it enabled the manufacturer to reduce the size of portable recorders. | SOURCE: https://en.wikipedia.org/wiki/Dictaphone
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[ENG] Cylinder phonograph technology continued to be used for Dictaphone and Ediphone recordings for office use for decades. | In 1947, Dictaphone replaced wax cylinders with their Dictabelt technology, which cut a mechanical groove into a plastic belt instead of into a wax cylinder. This was later replaced by magnetic tape recording. However, cylinders for older style dictating machines continued to be available for some years, and it was not unusual to encounter cylinder dictating machines into the 1950s. | SOURCE: https://en.wikipedia.org/wiki/Phonograph_cylinder
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[ENG] Edison Dictaphone: 8-inch long cylinder format specifically designed for dictation. It varied in both speed and threads per inch (tpi) from Edison’s | [ENG] https://www.clir.org/wp-content/uploads/sites/6/pub164.pdf |
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