The Probert Encyclopaedia of Science & Technology

PHONOGRAPH

The phonograph was a device invented by Thomas Edison in 1877 for recording and reproducing sounds upon tin foil. The phonograph consisted of a grooved cylinder, covered with tin foil. The cyclinder was revolved and slowly moved endways by means of turning a handle. On each side of the cylinder was a recorder with a diaphragm and needle which indented the foil in response to the sound vibrations received. The phonograph was the fore-runner of the gramaphone
Research Phonograph