Magnetically operated display device

Details Magnetically operated display device Magnetically operated display device

1989-10-20

1991-04-09

Brown, Peter R.

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Alphanumeric device

34081505, 34081527, G09F 930

Patent

active

050053051

ABSTRACT:
A magnetically operated display element having contrasting opposite sides, is symmetrically mounted in a surrounding frame for pivoting about an axis. A permanent magnet within the display element has poles on opposite sides of the pivoting axis. A U-shaped electromagnet has its pole pieces positioned on opposite sides of the pivoting axis where they may interact with the poles of the permanent magnet. The permanent magnet has a asymmetrical magnetic construction relative to the pivoting axis. When the electromagnet is energized, the repulsion at one pole of the permanent magnet is always greater than at the other pole of the permanent magnet, causing rotation of the display element. The display element is statically and dynamically balanced.

REFERENCES:
patent: 2740955 (1956-04-01), Barrett
patent: 3942274 (1976-03-01), Winrow
patent: 4243978 (1981-01-01), Winrow
patent: 4531318 (1985-07-01), Chang et al.
patent: 4577427 (1986-03-01), Browne
patent: 4860470 (1989-08-01), Browne

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