US5526236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting device used in an exit sign
Assignee: DLAC Inc
•
Filing: 1994-07-27
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Granted: 1996-06-11
•
Expires: 2014-07-27
Abstract
Abstract In a lighting fixture such as an exit sign, a light emitting diode lighting device is provided for mating engagement with an electrical socket of the lighting fixture. The light emitting diode device has a plurality of light emitting diodes recessed in a U-shaped channel for directing light through a diffuser into a desired illumination pattern.
Inventors
- 👤 James J. Burnes
- 👤 Charles R. Rukouski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:00
CPC Classifications
G; G09; G09F; G09F13/00; G09F13/04; F; F21; F21K; F21K9/00; F21K9/20; F21K9/23; G08; G08B; G08B7/00; G08B7/06; G08B7/062; G09F13/18; H; H05; H05B; H05B45/00; H05B45/30; H05B45/37; H05B45/3725; H05B45/38; F21S; F21S9/00; F21S9/02; F21S9/022; F21W; F21W2111/00; F21Y; F21Y2115/00; F21Y2115/10; G09F13/0418; G09F13/0454; G09F2013/05; G09F2013/1804; G09F2013/1831; H10; H10W; H10W90/00; Y; Y02; Y02B; Y02B20/00; Y02B20/30; Y10; Y10S; Y10S362/00; Y10S362/80; Y10S362/812
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
123 words
A lighting device for illuminating indicia of an exit sign having an enclosure, comprising: (a) a lighting device housing having a light directing channel in one side thereof; (b) an illumination source in said housing, said illumination source including a plurality of light emitting diodes recessed in said light directing channel; (c) a diffuser mounted to said housing adjacent said channel whereby light from said light emitting diodes is directed by said light directing channel through said diffuser into the enclosure to illuminate the indicia of the exit sign; and (c) a mounting base assembly on said housing for electrically connecting said illumination source to the exit sign, said mounting base assembly permitting orientation of said housing relative to said mounting base assembly.
Claim 2
Dependent Claim
123 words
A lighting device for illuminating indicia of an exit sign having an enclosure, comprising: (a) a lighting device housing having a light directing channel in one side thereof; (b) an illumination source in said housing, said illumination source including a plurality of light emitting diodes recessed in said light directing channel; (c) a diffuser mounted to said housing adjacent said channel whereby light from said light emitting diodes is directed by said light directing channel through said diffuser into the enclosure to illuminate the indicia of the exit sign; and (c) a mounting base assembly on said housing for electrically connecting said illumination source to the exit sign, said mounting base assembly permitting orientation of said housing relative to said mounting base assembly.
Claim 3
Dependent Claim
15 words
The lighting device in accordance with claim 1, wherein said light directing channel is U-shaped.
Claim 4
Dependent Claim
17 words
The lighting device in accordance with claim 1, wherein said light directing channel has sloping side walls.
Claim 5
Dependent Claim
15 words
The lighting device in accordance with claim 3, wherein said light directing channel is U-shaped.
Claim 6
Dependent Claim
22 words
The lighting device in accordance with claim 1, wherein said housing has a groove therein in which said diffuser is slidably positioned.
Claim 7
Dependent Claim
24 words
The lighting device in accordance with claim 1, wherein said diffuser has a light distributing surface thereon which distributes light from said illumination source.
Claim 8
Dependent Claim
22 words
The lighting device in accordance with claim 1, wherein said plurality of light emitting diodes are mounted on a printed circuit board.
Claim 9
Dependent Claim
43 words
The lighting device in accordance with claim 7, wherein said printed circuit board has electrical components thereon electrically connected to said illumination source, said electrical components also being electrically connected to a source of electrical power for providing power to said illumination source.
Claim 10
Dependent Claim
27 words
The lighting device in accordance with claim 1, wherein said mounting base assembly is matingly received in the exit sign through relative rotational and axial movement therebetween.
Claim 11
Dependent Claim
69 words
The lighting device in accordance with claim 1, wherein said mounting base assembly is adapted to connect to a primary electric power circuit of the exit sign, and wherein an emergency electric power circuit in said housing is operationally connected to the primary electric power circuit through said mounting base assembly to detect failure of the primary electric power circuit and thereafter provide auxiliary power to said illumination source.
Claim 12
Dependent Claim
20 words
The exit sign in accordance with claim 10, wherein said emergency electric power circuit includes at least one rechargeable battery.
Claim 13
Dependent Claim
32 words
The exit sign in accordance with claim 11, wherein said emergency electric power circuit includes a charging device for keeping said at least one rechargeable battery fully charged during periods of nonuse.
Claim 14
Dependent Claim
149 words
An exit sign, comprising: (a) a sign housing defining an enclosure therein and having indicia to be illuminated; and (b) at least one lighting device within said enclosure for illuminating said indicia, each lighting device comprising: (i) a lighting device housing having a light directing channel in one side thereof; (ii) an illumination source in said lighting device housing, said illumination source including a plurality of light emitting diodes recessed in said light directing channel; (iii) a diffuser mounted to said lighting device housing adjacent said channel whereby light from said light emitting diodes is directed by said light directing channel through said diffuser into said enclosure to illuminate said indicia; and (iv) a mounting base assembly on said lighting device housing for electrically connecting said illumination source to a primary electric power circuit, said mounting base assembly permitting orientation of said housing relative to said mounting base assembly.
Claim 15
Dependent Claim
149 words
An exit sign, comprising: (a) a sign housing defining an enclosure therein and having indicia to be illuminated; and (b) at least one lighting device within said enclosure for illuminating said indicia, each lighting device comprising: (i) a lighting device housing having a light directing channel in one side thereof; (ii) an illumination source in said lighting device housing, said illumination source including a plurality of light emitting diodes recessed in said light directing channel; (iii) a diffuser mounted to said lighting device housing adjacent said channel whereby light from said light emitting diodes is directed by said light directing channel through said diffuser into said enclosure to illuminate said indicia; and (iv) a mounting base assembly on said lighting device housing for electrically connecting said illumination source to a primary electric power circuit, said mounting base assembly permitting orientation of said housing relative to said mounting base assembly.
Claim 16
Dependent Claim
15 words
The exit sign in accordance with claim 13, wherein said light directing channel is U-shaped.
Claim 17
Dependent Claim
17 words
The exit sign in accordance with claim 13, wherein said light directing channel has sloping side walls.
Claim 18
Dependent Claim
15 words
The exit sign in accordance with claim 15, wherein said light directing channel is U-shaped.
Claim 19
Dependent Claim
24 words
The exit sign in accordance with claim 13, wherein said lighting device housing has a groove therein in which said diffuser is slidably positioned.
Claim 20
Dependent Claim
24 words
The exit sign in accordance with claim 13, wherein said diffuser has a light distributing surface thereon which distributes light from said illumination source.
Claim 21
Dependent Claim
22 words
The exit sign in accordance with claim 13, wherein said plurality of light emitting diodes are mounted on a printed circuit board.
Claim 22
Dependent Claim
43 words
The exit sign in accordance with claim 19, wherein said printed circuit board has electrical components thereon electrically connected to said illumination source, said electrical components also being electrically connected to a primary electric power circuit for providing power to said illumination source.
Claim 23
Dependent Claim
27 words
The exit sign in accordance with claim 13, wherein said mounting base assembly is matingly received in said sign housing through relative rotational and axial movement therebetween.
Claim 24
Dependent Claim
51 words
The exit sign in accordance with claim 13, wherein an emergency electric power circuit in said lighting device housing is operationally connected to the primary electric power circuit through said mounting base assembly to detect failure of the primary electric power circuit and thereafter provide auxiliary power to said illumination source.
Claim 25
Dependent Claim
20 words
The exit sign in accordance with claim 22, wherein said emergency electric power circuit includes at least one rechargeable battery.
Claim 26
Dependent Claim
32 words
The exit sign in accordance with claim 23, wherein said emergency electric power circuit includes a charging device for keeping said at least one rechargeable battery fully charged during periods of nonuse.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-06-11 | 1999-12-11 | 2000-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-06-11 | 2003-12-11 | 2004-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-06-11 | 2007-12-11 | 2008-06-11 | $7700.00 | Window Closed / Lapsed |