Illuminated meter

Details Illuminated meter Illuminated meter

1990-01-19

1990-11-13

Hannaher, Constantine

Radiant energy

Luminophor irradiation

Self-luminous article

116288, 116DIG36, 2504611, G01D 1328

Patent

active

049704001

ABSTRACT:
To uniformly illuminate a needle and a dial plate coated with fluorescent substance by ultraviolet rays, the illuminate meter comprises an ultraviolet ray emitting lamp and a meter cover coated with a film for reflecting only ultraviolet rays emitted from the lamp but transmitting visible light emitted from the fluorescent substance on the needle and the dial plate, thus improving the illuminate intensity and uniformity for providing better indication recognizability and reading accuracy. Further, it is preferable to dispose one or plural reflector plates between the dial plate and the meter cover.

REFERENCES:
patent: 2761056 (1956-08-01), Lazo
patent: 4057730 (1977-11-01), Dane
patent: 4201916 (1980-05-01), Ellner

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