Word: visagraph
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Dates: during 1931-1931
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Blind workers ended their world conference in Manhattan last week (TIME, April 20) and went visiting in other Eastern communities. Behind them they left a new kind of machine, called the printing visagraph, which enables the blind to read print without the mediation of Braille symbols...
...visagraph works as follows: slim beams of light are reflected from a printed page into a selenium cell which translates the blank and printed patches into various electrical frequencies. The currents operate electromagnets which drive pins against a sheet of aluminum. The aluminum progressively becomes embossed with letters as the master light roves across the original page. The blind thereby can feel the upcoming words almost as fast...