Method of mounting lenses in illuminated signs, etc.

Details Method of mounting lenses in illuminated signs, etc. Method of mounting lenses in illuminated signs, etc.

1995-12-11

1998-01-06

Ben, Loha

Optical: systems and elements

Lens

With support

359811, 359619, 40454, G02B 702

Patent

active

057061424

ABSTRACT:
Transparent acrylic lens elements can be screwed into drilled holes in the display sheet of an interiorly lighted sign box, to form illuminated messages. Each lens element has an enlarged head, and a cylindrical shank fitting into one of the drilled holes. A helical wall extending around and along the shank, so that the lens element can be rotated for screwing the element into the drilled hole. The helical wall has parallel flat side surfaces adapted to exert frictional grip forces on the associated display sheet, so that the lens element can be inserted partway into the hole to achieve different spacings of the enlarged head relative to the display.

REFERENCES:
patent: 2252504 (1941-08-01), Hahn
patent: 4669832 (1987-06-01), Wolken
patent: 4696546 (1987-09-01), Hodges
patent: 4732453 (1988-03-01), de Montebello et al.
patent: 5146703 (1992-09-01), Boden

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