Card – picture – or sign exhibiting – Changing exhibitor – Alphanumeric device
Patent
1998-09-09
2000-01-04
Picard, Leo P.
Card, picture, or sign exhibiting
Changing exhibitor
Alphanumeric device
40442, 40447, 336180, 336200, 336232, 336223, 361801, 361807, 361809, G09F 930
Patent
active
060096489
ABSTRACT:
A changeable display element is edgewise mounted on an insulating board and carries to rotate through about 180.degree. to show one color face or the other to a viewer. The board provides a similarly colored face for each face to form a pixel. The element carries a permanent magnet and is driven by a switchable magnetic field provided from the board. Soft iron pads on the board cooperates with the magnet on each position to retain the element against incidental displacement between application of the field. The board may support arrays of such elements.
REFERENCES:
patent: 4075591 (1978-02-01), Haas
patent: 4201965 (1980-05-01), Onyshkevych
patent: 4577427 (1986-03-01), Browne
patent: 5521573 (1996-05-01), Inoh et al.
patent: 5600908 (1997-02-01), Hogberg
patent: 5627563 (1997-05-01), Nakagiri et al.
patent: 5809675 (1998-09-01), Tijanic et al.
Foster David
Mark IV Industries Limited
Picard Leo P.
Westell Robert L.
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