Education and demonstration – Communication aids for the handicapped – Tactile reading aid
Patent
1985-03-29
1986-05-06
Grieb, William H.
Education and demonstration
Communication aids for the handicapped
Tactile reading aid
G09B 2102
Patent
active
045869049
ABSTRACT:
A device for forming a tactilely readable message including Braille characters and graphic representations includes a planar display carrier with raised raster dots which are formed by spherical segments protruding selectively through openings in the surface of the display carrier. The display carrier is provided with a multiplicity of recesses arranged in a matrix-like array, the recesses being occupied by respective sensing or reading balls which are selectively movable in the recesses as keying elements for the raster dots. The recesses communicate at a lower end with respective chamber-like enlargements occupied by respective control balls of magnetically soft material which function to alternately position the reading balls in a lowered or in a raised position. The chamber-like enlargements are designed to provide for the control balls a lower stable position and an upper stable position corresponding respectively to the lowered and raised positions of the reading balls. For all the control balls of a matrix row, a resetting device in the form of a comb-liked slide is provided. The placement of the control balls in preselected positions for forming a readable display is accomplished by means of one or more individual magnets acting on the control balls via magnetic bridges designed as pole pieces.
REFERENCES:
patent: 3736672 (1973-06-01), Skewis
patent: 3987438 (1976-10-01), Lindenmueller et al.
patent: 4191945 (1980-03-01), Hannen et al.
patent: 4266936 (1981-05-01), Rose et al.
patent: 4500293 (1985-02-01), Eltgen
Xerox Disclosure Journal "Braille Points Duplication" vol. 1, No. 5, May 1976.
Grieb William H.
Siemens Aktiengesellschaft
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