Card – picture – or sign exhibiting – Illuminated sign – Edge illuminated
Reexamination Certificate
2002-05-13
2004-03-16
Silbermann, Joanne (Department: 3611)
Card, picture, or sign exhibiting
Illuminated sign
Edge illuminated
C040S578000, C040S542000
Reexamination Certificate
active
06705033
ABSTRACT:
The present invention relates generally to an improved street sign in which, more particularly, LEDs are the source of illumination of the sign and the noteworthy improvements, embodied in its construction is, in furtherance of its outdoor use, the weather barrier protection it A provides to the LEDs against short circuits and the like, without which outdoor use would not be possible.
EXAMPLE OF THE PRIOR ART
Advantageous use of light emitting diodes (LEDs) for sign illumination, a building “exit” sign being an example, is already known from U.S. Pat. No. 6,026,602 for “Apparatus and Method of Indirectly Illuminating A Sign” issued to Grondal et al. on Feb. 2, 2000. In the '
602
patented sign the LEDs positioned about the periphery of the letters spelling out the sign name provide it with high visibility, but such a sign as known from common experience is positioned indoor to achieve egress outside for those instructed by the sign. In an outdoor sign, the LEDs are thought to be a drawback because exposure to weather elements would cause short circuits and other malfunctioning, and thus the high performance visibility afforded by LEDs is not used in a common, ordinary street sign which is relied on to provide traffic and like vital information to the public.
Broadly, it is an object of the present invention to overcome the foregoing and other shortcomings of the prior art.
More particularly, it is an object to display for external viewing through acrylic material LED-illuminated street names and thusly to use to advantage both utilitarian functions of the acrylic, namely, to reflect light and to seal against water penetration to the LEDs, all as will be better understood as the description proceeds.
REFERENCES:
patent: 3578538 (1971-05-01), Prosser et al.
patent: 3591942 (1971-07-01), Van Swearingen
patent: 4811507 (1989-03-01), Blanchet
patent: 5992068 (1999-11-01), de Saro
patent: 1 091 516 (1967-11-01), None
Greene Jason
Greene Kenneth L.
Myron Amer P.C.
Silbermann Joanne
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