Analog indicator with self-luminescent pointer

Details Analog indicator with self-luminescent pointer Analog indicator with self-luminescent pointer

1994-11-16

1997-06-10

Cuchlinski, Jr., William A.

Signals and indicators

Indicators

Rotary indicator with actuating means

116328, 116332, G01D 1322

Patent

active

056365896

ABSTRACT:
A self-luminescent indicator which may be employed in a tachometer, a speedometer, or other such gauges in automotive vehicles. The self-luminescent indicator comprises an indicating pointer, a luminescent element, and a semitransparent member. The indicating pointer includes a housing and a cover. The housing has formed therein a groove. The luminescent element is disposed in the groove of the housing. The semitransparent member is arranged within the cover of the indicating pointer for diffusing light emitted from the luminescent element out of the indicating pointer. The semitransparent member has side walls extending substantially parallel to each other in a vertical direction parallel to a given optical path of the luminescent element. With this arrangement, the indicating pointer projects light having uniform and high brightness to an observer without having the light experience total reflection in the semitransparent member so as to improve the visibility of pointer deflection over a dial plate.

REFERENCES:
patent: 2792803 (1957-05-01), Hardesty
patent: 3066643 (1962-12-01), Flanagan, Jr.
patent: 3219008 (1965-11-01), Harris et al.
patent: 4163428 (1979-08-01), Ishikawa
patent: 4257084 (1981-03-01), Reynolds
patent: 4300470 (1981-11-01), Furukawa
patent: 5161872 (1992-11-01), Sasaki et al.
patent: 5211128 (1993-05-01), Katoh et al.

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