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Concave Piano
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Cludsen's Concave Keyboard

Concave Keyboard

Cludsen's Concave Keyboard, 1910

About 1780, Neuhaus, a piano maker of Vienna, constructed a concave-formed keyboard for his pianos. He aimed to follow the inclination of the human arm to move in a semicircle. This same idea was later tried by Cludsam of Germany, who obtained patents on such a keyboard and seriously attempted to promote it.

From the book Pianos and Their Makers   by Alfred Dolge

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