Edison's first cylindrical phonograph
Bildnummer 11904437
| Edison's first phonograph. First cylindrical phonograph or gramophone invented in 1877 by Thomas Alva Edison (1847-1931). His favourite invention,it consisted of a tin foil wrapped on a cylinder (at centre). To make a recording,a free-floating needle was skimmed over the foil as the cylinder was rotated by a handle (at left). The needle was connected to a sound receiver (at centre right). The needle vibrated in time to the sound waves and made etchings in the foil. If a sound horn was attached,this etching could then be used to play back a distorted but recognisable recording of a person's voice | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library |
| Bildgröße: | 4098 px × 2480 px |
| Modell-Rechte: | nicht erforderlich |
| Eigentums-Rechte: | nicht erforderlich |
| Restrictions: | - |
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