Illumination – Illuminated scale or dial – Edge illuminated modifier or light rod/pipe
Patent
1998-03-26
2000-02-01
Husar, Stephen
Illumination
Illuminated scale or dial
Edge illuminated modifier or light rod/pipe
362551, G01D 1128
Patent
active
060194782
ABSTRACT:
The control knob engages, on its interior, a translucent polycarbonate jewel body collar assembly of a first color, such as white, which, in turn, provides a housing for a translucent polycarbonate jewel light pipe assembly of a second color, such as blue or blue-green. The jewel body collar assembly includes a collar to engage the interior cylindrical support section of the control knob and a light pipe housing assembly to engage the jewel light pipe assembly. The jewel body collar assembly further includes a ridge which protrudes through a slot in the sidewall and front face of the control knob thereby forming an indicator for the control knob. In ambient illumination, such as during the day, the indicator appears to be the color of the jewel body collar assembly, such as white. However, when the dashboard is electrically illuminated, such as during the night, the illumination is collected by the jewel light pipe assembly, and the color of the jewel light pipe assembly, such as blue or blue-green, is projected through the ridge of the jewel body collar assembly and the indicator appears to be blue or blue-green.
REFERENCES:
patent: 5171080 (1992-12-01), Bathurst
patent: 5335148 (1994-08-01), Tominaga
patent: 5752759 (1998-05-01), Pizzo
Husar Stephen
Illinois Tool Works Inc.
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