Indicator lamps

Details Indicator lamps Indicator lamps

1981-08-28

1987-12-08

Nelson, Peter A.

Illumination

Illuminated scale or dial

Internal light source

362307, 362310, 362800, G01D 1128

Patent

active

047121637

ABSTRACT:
The invention relates to indicator lamps and in particular to such lamps which are required to be clearly visible in high ambient light conditions.
In order to overcome the problem of light emitted by the lamp competing with the ambient light reflected from the lamp the invention provides an indicator lamp having a light source contained within a light source support in which substantially all of the surfaces of the light source support surrounding the light source are coated black, except for a portion of the surfaces through which emitted light from the light source passes outwardly to the viewer.
In a preferred embodiment the light source is an L.E.D.

REFERENCES:
patent: 3746853 (1973-07-01), Kosman et al.
patent: 3821590 (1974-06-01), Kosman et al.
patent: 3871170 (1975-03-01), Bergey
patent: 4118924 (1978-10-01), Foellner
patent: 4206493 (1980-06-01), Towne et al.
patent: 4228490 (1980-10-01), Thillays
patent: 4296459 (1981-10-01), DeLuca
patent: 4321655 (1982-03-01), Bouvrande
patent: 4329625 (1982-05-01), Nishizawa et al.
patent: 4364107 (1982-12-01), Wieczorek et al.

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