File:Foucault for the Blind.jpg

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Description
English: "Foucalt's Printing Key Frame"; one of the ancestors of the typewriter; one of many "writing machines" invented in the 19th century. This one is for use by the blind. Note the radial letters, the same crucial idea as the typewriter.
Date
Source "Leading American Inventors", public-domain book downloaded from archive.org
Author George Iles

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This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
United States
United States
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current03:42, 15 January 2009Thumbnail for version as of 03:42, 15 January 20091,546 × 1,968 (1.85 MB)Shreevatsa (talk | contribs){{Information |Description={{en|1="Foucalt's Printing Key Frame"; one of the ancestors of the typewriter; one of many "writing machines" invented in the 19th century. This one is for use by the blind. Note the radial letters, the same crucial idea as the

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