Communications: electrical – Visual indication – Movable
Patent
1985-10-10
1988-10-04
Curtis, Marshall M.
Communications: electrical
Visual indication
Movable
340763, 340783, G09G 334
Patent
active
047758627
ABSTRACT:
A display member (10) comprising a housing (14) having a chamber (12) with a viewing face (16) and a lamina member (24) movably mounted within the chamber (12) to be movable into a first position in which one face (26) of the member (22) is in face to face contact with the viewing face (16) and a second position in which the one face (26) of the member (24) is out of contact with the viewing face (16) and the other face (25) is in face to face with a rear face (15) of the chamber (12) spaced rearwardly from the viewing face (16), a drive (22,20) being provided to produce an attractive and/or repulsive force between the housing (14) and the member (24) to move the member (24) from the first or second position to the other position wherein no external energy need be provided to maintain the member (24) in the first or second position, an opaque fluid filling the chamber.
REFERENCES:
patent: 1049240 (1912-12-01), Janecek
patent: 3530606 (1970-09-01), O'Keefe
patent: 3698793 (1972-10-01), Tellerman
patent: 3812490 (1974-05-01), Goodrich
patent: 3825927 (1974-07-01), Passien
patent: 3863249 (1975-01-01), Olah
patent: 4062009 (1977-12-01), Raverdy et al.
Curtis Marshall M.
E.R.G. Management Services Ltd.
Fatahiyar Mahmoud
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