Lighting system for appliance dials

Details Lighting system for appliance dials Lighting system for appliance dials

1986-12-08

1987-11-10

Dority, Jr., Carroll B.

Illumination

Illuminated scale or dial

Edge illuminated modifier or light rod/pipe

362 32, 62125, G01D 1128

Patent

active

047061693

ABSTRACT:
An acrylic lightpipe transmits light from the lamp compartment of a refrigerator to the inner surface of an indexed control dial for backlighting. The lightpipe is supported within the refrigerator by a bracket positioned in proximity to the dial to be illuminated. Integral extensions formed on the light pipe are gripped by the bracket to prevent the lightpipe from rotating or translating with respect to the dial. The lightpipe is cantilevered by the bracket to backlight only a selected portion of the dial. The light emitting end face of the lightpipe is planar and angled to form an obtuse angle with the axis of the pipe to efficiently illuminate the dial.

REFERENCES:
patent: 2290278 (1942-07-01), Failla
patent: 2672117 (1954-03-01), Morphew
patent: 2737744 (1952-04-01), Sturges et al.
patent: 3040458 (1962-06-01), Mathews
patent: 3278738 (1966-10-01), Clark
patent: 3699915 (1972-10-01), Greene
patent: 3781537 (1973-12-01), Ramsey
patent: 4383288 (1983-05-01), Hess, II et al.
Blumenfeld et al., "Parts that Glow", 1959, 10 pages, Design Staff Rohm & Hass Co., Philadelphia, Pa.

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