Phonographe d'Edison a été élaboré à la suite de Thomas Edison's travailler sur deux autres inventions, le télégraphe et le téléphone. En 1877, Edison travaillait sur une machine qui serait transcrire des messages télégraphiques à travers des impressions sur un ruban de papier, qui pourrait par la suite être envoyés sur le télégraphe à plusieurs reprises. Ce développement a conduit à spéculer que Edison téléphone un message peut également être enregistrée de la même façon. Il a expérimenté avec un diaphragme qui avait un point de gaufrage et a eu lieu à l'encontre de la paraffine en mouvement rapide du papier. Les vibrations fait parler dans les indentations du papier. Plus tard, Edison

• Contributeur: Smith Archive / Alamy Banque D'Images
• ID de l’image: WHBDH4
• Taille du fichier: 72,5 MB (1,2 MB Téléchargement compressé)
• Autorisations: Modèle - non | Propriété - non
• Dimensions: 4760 x 5323 px | 40,3 x 45,1 cm | 15,9 x 17,7 inches | 300dpi
• Date de la prise de vue: 28 août 2019
• Photographe: Smith Archive

Informations supplémentaires

Edison's phonograph was developed as a result of Thomas Edison's work on two other inventions, the telegraph and the telephone. In 1877, Edison was working on a machine that would transcribe telegraphic messages through indentations on paper tape, which could later be sent over the telegraph repeatedly. This development led Edison to speculate that a telephone message could also be recorded in a similar fashion. He experimented with a diaphragm which had an embossing point and was held against rapidly-moving paraffin paper. The speaking vibrations made indentations in the paper. Edison later changed the paper to a metal cylinder with tin foil wrapped around it. The machine had two diaphragm-and-needle units, one for recording, and one for playback. When one would speak into a mouthpiece, the sound vibrations would be indented onto the cylinder by the recording needle in a vertical (or hill and dale) groove pattern. Edison gave a sketch of the machine to his mechanic, John Kreusi, to build, which Kreusi supposedly did within 30 hours. Edison immediately tested the machine by speaking the nursery rhyme into the mouthpiece, Mary had a little lamb. To his amazement, the machine played his words back to him. Although it was later stated that the date for this event was on August 12, 1877, some historians believe that it probably happened several months later, since Edison did not file for a patent until December 24, 1877..

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