Black light display system

Card – picture – or sign exhibiting – Illuminated sign – Edge illuminated

Patent

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Details

40543, G09F 1318

Patent

active

047917458

ABSTRACT:
A lamp base houses a source of black light. An upstanding transparent acrylic sheet is edge lit by the black light source. Fluorescent paint on the surface of the acrylic sheet is excited by the black light, which causes the sign to light with an appearance somewhat similar to the appearance of a neon sign. The acrylic sheet is designed to snap into and out of the lamp base so that one sign may be substituted for another, quickly and easily.

REFERENCES:
patent: 2276114 (1942-03-01), Sture
patent: 2499824 (1950-03-01), Haecker
patent: 2564110 (1951-08-01), Howenstine et al.
patent: 2630643 (1953-03-01), Smithson et al.
patent: 2689917 (1954-09-01), Switzer
patent: 2833072 (1958-05-01), Gregory
patent: 3000774 (1961-09-01), Swedlow et al.
patent: 4016450 (1977-04-01), Balekjian

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