Illuminated electrical part

Details Illuminated electrical part Illuminated electrical part

1991-03-07

1991-11-19

Husar, Stephen F.

Illumination

Illuminated scale or dial

Internal light source

362354, 362373, G01D 1128

Patent

active

050670506

ABSTRACT:
An illuminated electrical part comprises a case, an indicator panel attached to the open front end of the case, a housing attached to the case so as to define an illuminating space behind the indicator panel, and an illuminating device comprising a light source disposed behind the indicator panel and mounted on the housing, and a cover formed of a highly heat-conductive material, fixed to the housing so as to cover the light source and provided with light control slits in its top wall extending between the indicator panel and the light source and with light control apertures in its opposite side walls. The numbers, shape and arrangement of the light control sliuts and the light control apertures are determined selectively so that the entire area of the indicator panel is illuminated uniformly by light emitted by the light source, scattered by the inner surface of the housing and shed through the light control slits and the light control apertures.

REFERENCES:
patent: 4328532 (1982-05-01), Smith
patent: 44483835 (1984-04-01), Brautigam et al.
patent: 4807091 (1989-02-01), Obata

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