| Date | Text | |
|---|---|---|
29 May 1923
Edison patent |
Edison patent In 1923, Thomas A. Edison was issued a patent concerning "Stylus Mounting" (No. 1,456,687), a mount for phonograph stylii formed of a jewel such as diamond or sapphire in which the stylus is partially enclosed in a metal holder and projects from a reduced end portion thereof. The particular improvement is to provide for the stylus to be firmly and rigidly held to prevent it from loosening in use. A method of reinforcing the stylus mounting is applied at its weakest point, which is where the stylus emerges. An electroplating cell is used to apply a nickel reinforcing collar to the stylus. |
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