Magnetic display device

Details Magnetic display device Magnetic display device

1977-02-01

1981-05-19

Pitts, Harold I.

Communications: electrical

Audible indication

Percussion-type sound producer

340373, G08B 530

Patent

active

042688213

ABSTRACT:
A multi-position electromagnetically actuated display element suitable for use in a matrix arrangement to display user-selected messages is disclosed. The element is indexed to display a selected face by energizing one of a plurality of stator coils, the energized coil then attracting a pole of a magnet disposed outwardly of the stator and affixed to the viewing faces. Mounting structures and drive circuitry are disclosed suitable for arranging the element in a matrix display and causing the elements in the matrix to display user-selected messages. Alternative embodiments are disclosed.

REFERENCES:
patent: 3089131 (1963-05-01), Morgan
patent: 3166744 (1965-01-01), Leonchick
patent: 3289131 (1966-11-01), Watkins et al.
patent: 3307170 (1967-02-01), Aoyama
patent: 3353174 (1967-11-01), Lang
patent: 3375512 (1968-03-01), Watkins
patent: 3573812 (1971-04-01), Pihl
patent: 3636557 (1972-01-01), Watkins
patent: 3798640 (1974-03-01), Dill
patent: 3806744 (1974-04-01), Abraham
patent: 3970980 (1976-07-01), Nelson

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