Changeable digital display device

Details Changeable digital display device Changeable digital display device

1986-04-16

1988-03-08

Friedman, Carl D.

Card, picture, or sign exhibiting

Changing exhibitor

Alphanumeric device

40447, 40486, G09F 304

Patent

active

047291842

ABSTRACT:
A manually changeable digital display device capable of displaying the numerals zero through 9 comprises a background panel having an optic or brightly colored face and a one-piece foreground panel adjacent to and parallel with the background panel. The one-piece foreground panel has seven elongated windows or openings which expose seven corresponding segments of the background panel. Each of the windows is covered by a flap which is integrally formed with the foreground panel and is hinged thereto. The desired numerals are formed by opening and closing the appropriate flaps to expose the appropriate corresponding segments thereby displaying the desired numerals. Two or more such digital display units can be arranged side by side to display the numerals 10 through any desired number.

REFERENCES:
patent: 384431 (1888-06-01), Dunham
patent: 1257989 (1918-03-01), Ewing
patent: 1952920 (1934-03-01), Hudiakoff
patent: 2120418 (1938-06-01), Sorensen
patent: 3296726 (1967-01-01), Hill
patent: 4164824 (1979-08-01), Nidelkoff
patent: 4220948 (1980-09-01), Trame
patent: 4507886 (1985-04-01), Streeter et al.
patent: 4509279 (1985-04-01), Greenberger
patent: 4539768 (1985-09-01), Halliday
patent: 4542603 (1985-09-01), Streeter et al.

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