NMSAT :: Networked Music & SoundArt Timeline

1888 __ Gramophone discs — Berliner, Kammer & Reinhardt
Comment : The early gramophone discs were made with a zinc base with a beeswax coating etched with chromic acid.Emile Berliner first demonstrated his Gramophone in 1888. The following year, the German toy manufacturers Kammer & Reinhardt agreed to produce Berliner's invention and press the first 5-inch discs. Berliner's discs produced sounds from a laterally moving stylus (as opposed to the vertical motion required to play cylinders). To record sounds, the stylus cut a wavy groove analogous to the sound wave through a layer of wax on a flat disc with a zinc base. The disc was then immersed in an acid which ate away the zinc only where it was exposed by the groove in the wax. The resulting zinc disc was used as a master to produce the negative mould which could then press countless copies of a recording. The ease with which discs were mass produced gave them a significant commercial advantage over cylinders. (Compiled from various sources)
Urls : http://www.collectionscanada.gc.ca/gramophone/m2-3008-e.html (last visited ) http://www.bl.uk/onlinegallery/themes/recordplayers/kammer.html (last visited )

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