Information display device

Details Information display device Information display device

1975-07-03

1976-12-07

Mancene, Louis G.

Card, picture, or sign exhibiting

Check, label, or tag

Reinforced

G09T 1100

Patent

active

039953866

ABSTRACT:
An information display device includes a two-dimensional array of cells, each cell including an opaque wall pierced by an aperture and containing an opaque ferromagnetic spherical shutter member movable by electromagnetic means to roll upon a vertical wall of the cell between limiting positions in which it respectively exposes and occults the aperture. The shutter members may be restrained in their limiting positions by friction or magnets embedded in the cell walls.

REFERENCES:
patent: 3210757 (1965-10-01), Jacob
patent: 3426453 (1969-02-01), Dingwall et al.
patent: 3562938 (1971-02-01), Salam
patent: 3724110 (1973-04-01), Meyerson
patent: 3775881 (1973-12-01), Salam

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