Antique writing machine for blind people.

John Martin introduced this writing machine for blind people. Each letter is selected by touch and moved into line with the pointer. Once selected the plunger was pushed to make a letter-shaped hole in the paper fed by the rollers at the back. After the person finished typing, the paper was turned over and read by touch from the shapes of the holes in the paper.
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Braille micrometer for blind machinists - photos
Blind woodturner Dennis DeVendra