El fonógrafo de Edison fue desarrollado como resultado de la labor de Thomas Edison en otros dos inventos, el telégrafo y el teléfono. En 1877, Edison estaba trabajando en una máquina que transcribir mensajes telegráficos a través de hendiduras en cinta de papel, que más tarde podría enviarse a través del telégrafo repetidamente. Este desarrollo llevó a especular que Edison un mensaje telefónico también podrían grabarse en una manera similar. Él experimentó con un diafragma que tenía un punto de relieve y se celebró en contra de rápido movimiento de papel de parafina. Las vibraciones que habla las sangrías en el papel. Edison posterior

• Colaborador/a: Smith Archive / Alamy Foto de stock
• ID de la imagen: WHBDH4
• Tamaño: 72,5 MB (1,2 MB Descarga comprimida)
• Autorizaciones: Modelo - no | Propiedad - no
• Dimensiones: 4760 x 5323 px | 40,3 x 45,1 cm | 15,9 x 17,7 inches | 300dpi
• Fecha de toma: 28 de agosto de 2019
• Fotógrafo: Smith Archive

Más información

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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