Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1982-12-06
1986-01-21
Brigance, Gerald L.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340783, 40447, G09G 316
Patent
active
045660034
ABSTRACT:
A display element is formed by a four-sided right prismatic block member which is rotatable about the axis of its own, has embedded therein first and second magnetic pieces to extend along edges lying on the same diagonal line and has two display surfaces formed by two adjacent ones of four outer peripheral surfaces of the block member.
A display panel comprises a display surface structure, a display switching unit and a drive unit. The display surfaces structure has such display elements sequentially disposed on each line of arrangement at predetermined intervals. The display switching unit has an erasing magnetic head and a writing magnetic head common to the display elements disposed on each line of arrangement. The drive unit has means for moving the display elements and the erasing and writing magnetic heads relative to each other, and means for energizing the writing magnetic head in synchronism with the relative movement of them.
REFERENCES:
patent: 3335512 (1967-08-01), Newman
patent: 3482344 (1969-12-01), Holloman
patent: 4017851 (1977-04-01), Felice
patent: 4264906 (1981-04-01), Wakatake
Brier Jeffery A.
Brigance Gerald L.
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