Electric light display apparatus of light blocking type

Details Electric light display apparatus of light blocking type Electric light display apparatus of light blocking type

1981-12-14

1984-08-28

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

34081527, G09F 900

Patent

active

044686609

ABSTRACT:
An electric light display apparatus of the light blocking type comprising slender discharge tubes arranged in parallel rows on the front side of the apparatus and each divided by openable light blocking members into a multiplicity of sections arranged continuously longitudinally of the tube. The sections are exposed or shielded by the blocking members individually to display the desired characters, illustrations or like images with a collection of bright portions and dark portions. The apparatus is simple in construction and less susceptible to malfunctions and displays images of high luminance which are distinctly perceivable visually without requiring a great power consumption.

REFERENCES:
patent: 1612504 (1926-12-01), Furman
patent: 2141473 (1938-12-01), Hubertz
patent: 4161832 (1979-07-01), Bergamini

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