×

Illuminated sign and method for design

  • US 20010045034A1
  • Filed: 07/13/2001
  • Published: 11/29/2001
  • Est. Priority Date: 12/04/1997
  • Status: Active Grant
First Claim
Patent Images

1. An illuminated sign designed to be viewed from a horizontal line of sight of an observer, the light box comprising:

  • a frame having a width;

    a partially transparent face supported thereon;

    a single or plurality of lengthwise sections of luminous tubing mounted in the frame and having a tubing inside radius (r) and an inner surface having a reflector-closest edge, and;

    a single or plurality of concavely-curved, reflective channels each having an angle of wrap (β

    ) and a concave surface having a tubing-closest edge positioned at a distance (d) from the tubing inner surface reflector-closest edge;

    a reflective channel having a substantially semi-cylindrical shape with a radius of curvature (R) wherein the improvement comprises each said reflective channel having an actual angle of wrap (β

    a) approximately equal to about 70% to about 150% of a calculated value for β

    c which solves an equation consisting of;

    1sin

    (β







    c
    2
    )
    +2

    (Rr-dr-1)

    cos

    (β







    c
    2
    )
    =Rr.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×