Apparatus for displaying letters or pictures

Details Apparatus for displaying letters or pictures Apparatus for displaying letters or pictures

1990-10-11

1992-04-28

Apley, Richard J.

Education and demonstration

Communication aids for the handicapped

Tactile reading aid

434113, 400122, G09B 2100

Patent

active

051082900

ABSTRACT:
An apparatus for displaying patterns of balls forming a Braille-sign or other symbol or picture, comprise a driven running belt carrying the balls with it. According to the invention the belt is smooth--instead of being perforated--whereby the balls may be grouped upon the belt in arbitrary mutual positions. The balls are kept in place by being clamped against said belt by means of a second belt and due to the spaces between the two belts being maintained at a reduced air pressure.

REFERENCES:
patent: 3736672 (1973-06-01), Skewis et al.
patent: 3966273 (1976-06-01), Hagen et al.
patent: 4445871 (1984-05-01), Becker
patent: 4551102 (1985-11-01), Meinzer
patent: 4571190 (1986-02-01), Zagler et al.
patent: 4586904 (1986-05-01), Chlunsky
patent: 4650352 (1987-03-01), Eriksson

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