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magneto-phonograph

Definitions

from The Century Dictionary and Cyclopedia

  • n. In electricity, a phonograph which records speech magnetically. It consists of a very small magnet attached to a diaphragm and acting on a moving steel tape or wire which is magnetized in waves by the vibrations of the magnet when some one speaks against the diaphragm. In repeating, the magnetized steel tape, moving in front of the magnet, sets the magnet, and thereby the diaphragm, in vibration and reproduces the sound.

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