Light box

Details Light box Light box

1986-03-10

1988-08-30

Peshock, Robert

Card, picture, or sign exhibiting

Illuminated sign

Lamp box

40564, G09F 1304

Patent

active

047666854

ABSTRACT:
An illuminated sign. The illuminated sign comprises a cabinet with internal illumination, a diffusion plate, a transparent plate, and a retention strip with an associated camming strip.
The cabinet is provided with an internally facing, circumferential support flange, and a forwardly facing circumferential retention channel with longitudinal grooves therein.
In use, the diffusion and transparent plates (with indicia held therebetween) is releasably held on the support flange by the retention strip. Accidental removal of the retention strip is prevented by the interaction of the retention strip and the camming strip within the retention channel. This arrangement permits indicia to be quickly and easily changed from the front of the illuminated sign.

REFERENCES:
patent: 1746943 (1930-02-01), Hofmann
patent: 2163329 (1939-06-01), Sipdor
patent: 2303988 (1942-12-01), Christensen
patent: 3500569 (1970-03-01), Simmons

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