Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1982-12-28
1985-12-10
Brigance, Gerald L.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340783, 34081527, G08B 500
Patent
active
045583145
ABSTRACT:
The thin optical display panel of any convenient area formed of a plurality of pixel elements, each element comprising a pair of small, thin cavities in each transparent surface of the panel. Two cavities in each element are interconnected by a small conduit and one cavity in the conduit is filled with conductive opaque fluid, such as mercury or the like. The fluid in the conduit is subjected to a transverse, reversible magnetic field and a transverse, reversible current so that the fluid may be selectively and rapidly transferred between the cavities by electromagnetic pumping action. The indicia on the surfaces of the display panel are formed by appropriate selection of the directions of either the magnetic field or the transverse current in the many elements forming the panel.
REFERENCES:
patent: 3648269 (1972-03-01), Rosenweig et al.
patent: 3863249 (1975-01-01), Olah
patent: 3935571 (1976-01-01), Sargent
patent: 3972595 (1976-08-01), Romankiw et al.
patent: 4079368 (1978-03-01), DiStefano
patent: 4384761 (1983-05-01), Brady et al.
Brier Jeffery A.
Brigance Gerald L.
Hickman Paul L.
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