Gramophone

See also: Platinum (homonymy)

The American inventor Thomas Edison deposits the patent of the first gramophone the December 19th 1877.

Its device makes it possible to record sounds thanks to a Stylet composed of an interchangeable needle fixed on a diaphragm of Mica. This stylet engraves sonorities on a tin cylinder (of wax thereafter, which improved quality of the recording). As soon as the recording is finished, engraving can be read by the stylet. The needle, making vibrate the diaphragm, transforms the furrow engraved into sounds. In order to allow the diffusion of these first recordings, a mechanism of recopy on cylinder of Bakélite is developed: quality is better and especially the cylinder fears neither the deformations any more nor heat. It is this type of cylinder which one can observe on the photograph opposite.

There was an apparatus, the Gramophone , similar to a gramophone making it possible to record the texts intended to be typed. It laid out for this purpose of a reversible head and a horn as a microphone. To erase the message one planed the surface of the cylinder made up of wax.

The Gramophone S were an evolution of the gramophones. They took the name of it thereafter. The difference between these two types of apparatuses is done especially by the support of recording: cylinder for the gramophones, disc for the gramophones.

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