Patent US5459955A successfully refreshed from Google Patents.
US5459955A
Expired / Lapsed
US
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Lighting device used in an exit sign
Assignee: DLAC Inc
•
Filing: 1993-12-01
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Granted: 1995-10-24
•
Expires: 2013-12-01
Abstract
Abstract In 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 lighting device has a plurality of light emitting diodes with a light directing member spaced therefrom for directing light into a desired illumination pattern. The light directing member can be wedge or parabola shaped.
Inventors
- 👤 Charles R. Ruskouski
- 👤 James J. Burnes
- 👤 James R. Carson
- 👤 Hilario S. Costa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:24
CPC Classifications
G; G09; G09F; G09F13/00; G09F13/04; G09F13/14; F; F21; F21K; F21K9/00; F21K9/20; F21K9/23; G09F13/0418; G09F13/0422; G09F2013/05; G09F2013/145; Y; Y10; Y10S; Y10S362/00; Y10S362/80; Y10S362/812
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
89 words
A lighting device for illuminating indicia of an exit sign having an enclosure and a primary electrical power source, comprising: (a) a housing; (b) illumination means in said housing to be powered by the primary electrical power source, said illumination means including a plurality of light emitting diodes extending from said housing; and (c) light directing means connected to paid housing and spaced from said plurality of light emitting diodes for directing light from said light emitting diodes into the enclosure to illuminate the indicia of the exit sign.
Claim 2
Dependent Claim
89 words
A lighting device for illuminating indicia of an exit sign having an enclosure and a primary electrical power source, comprising: (a) a housing; (b) illumination means in said housing to be powered by the primary electrical power source, said illumination means including a plurality of light emitting diodes extending from said housing; and (c) light directing means connected to paid housing and spaced from said plurality of light emitting diodes for directing light from said light emitting diodes into the enclosure to illuminate the indicia of the exit sign.
Claim 3
Dependent Claim
17 words
The lighting device in accordance with claim 1, wherein said light directing means has a wedge shape.
Claim 4
Dependent Claim
17 words
The lighting device in accordance with claim 1, wherein said light directing means has a parabola shape.
Claim 5
Dependent Claim
26 words
The lighting device in accordance with claim 1, wherein said light directing means is moveable relative to said light emitting diodes to obtain various illumination patterns.
Claim 6
Dependent Claim
26 words
The lighting device in accordance with claim 1, wherein said housing has two legs extending therefrom and said light directing means extends between said two legs.
Claim 7
Dependent Claim
31 words
The lighting device in accordance with claim 5, wherein said light directing means is connected to said legs for movement relative to said light emitting diodes to obtain various illumination patterns.
Claim 8
Dependent Claim
29 words
The lighting device in accordance with claim 6, wherein said light directing means is connected to said legs for pivotal and rectilinear movement relative to said light emitting diodes.
Claim 9
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 10
Dependent Claim
23 words
The lighting device in accordance with claim 8, wherein said housing has an enclosure therein in which said printed circuit board is positioned.
Claim 11
Dependent Claim
19 words
The lighting device in accordance with claim 8, wherein said printed circuit board is part of said illumination means.
Claim 12
Dependent Claim
21 words
The lighting device in accordance with claim 8, wherein said printed circuit board has electrical components thereon for said illumination means.
Claim 13
Dependent Claim
38 words
The lighting device in accordance with claim 1, further including an emergency electric power supply in said housing to provide auxiliary power to said light emitting diodes in the event of failure of the primary electrical power source.
Claim 14
Dependent Claim
53 words
The lighting device in accordance with claim 12, wherein said emergency electric power supply includes at least one rechargeable battery, a charging device for keeping said at least one rechargeable battery fully charged during periods of nonuse and circuit for switching between said emergency electric power supply and the primary electrical power source.
Claim 15
Dependent Claim
34 words
The exit sign in accordance with claim 1, further including a rectifying circuit in said housing for rectifying electrical power from the primary electrical power source into direct current for powering said illumination means.
Claim 16
Dependent Claim
48 words
The exit sign in accordance with claim 1, further including a mounting base assembly on said housing for electrically connecting said illumination means to the exit sign, said mounting base assembly matingly received in an electrical socket of the exit sign through relative rotational and axial movement therebetween.
Claim 17
Dependent Claim
24 words
The lighting device in accordance with claim 15, wherein said mounting base assembly permits orientation of said housing relative to said mounting base assembly.
Claim 18
Dependent Claim
137 words
An exit sign connectable to a primary electrical power source, comprising: (a) a sign housing defining an enclosure therein and having indicia to be illuminated; (b) a primary electrical power circuit adapted to be connected to the primary electrical power source; (c) at least one lighting device electrically connected to said primary electrical power circuit and positioned within said enclosure for illuminating said indicia, each lighting device comprising: (i) a lighting device housing having an enclosure, (ii) illumination means in said lighting device housing, said illumination means including a plurality of light emitting diodes extending from said lighting device housing, and (iii) light directing means connected to said housing and spaced from said plurality of light emitting diodes for directing light from said light emitting diodes into the enclosure to illuminate said indicia of said sign housing.
Claim 19
Dependent Claim
137 words
An exit sign connectable to a primary electrical power source, comprising: (a) a sign housing defining an enclosure therein and having indicia to be illuminated; (b) a primary electrical power circuit adapted to be connected to the primary electrical power source; (c) at least one lighting device electrically connected to said primary electrical power circuit and positioned within said enclosure for illuminating said indicia, each lighting device comprising: (i) a lighting device housing having an enclosure, (ii) illumination means in said lighting device housing, said illumination means including a plurality of light emitting diodes extending from said lighting device housing, and (iii) light directing means connected to said housing and spaced from said plurality of light emitting diodes for directing light from said light emitting diodes into the enclosure to illuminate said indicia of said sign housing.
Claim 20
Dependent Claim
17 words
The exit sign in accordance with claim 17, wherein said light directing means has a wedge shape.
Claim 21
Dependent Claim
17 words
The exit sign in accordance with claim 17, wherein said light directing means has a parabola shape.
Claim 22
Dependent Claim
26 words
The exit sign in accordance with claim 17, wherein said light directing means is moveable relative to said light emitting diodes to obtain various illumination patterns.
Claim 23
Dependent Claim
29 words
The exit sign in accordance with claim 17, wherein each said lighting device housing has two legs extending therefrom and said light directing means extends between said two legs.
Claim 24
Dependent Claim
31 words
The exit sign in accordance with claim 21, wherein said light directing means is connected to said legs for movement relative to said light emitting diodes to obtain various illumination patterns.
Claim 25
Dependent Claim
29 words
The exit sign in accordance with claim 22, wherein said light directing means is connected to said legs for pivotal and rectilinear movement relative to said light emitting diodes.
Claim 26
Dependent Claim
22 words
The exit sign in accordance with claim 17, wherein said plurality of light emitting diodes are mounted on a printed circuit board.
Claim 27
Dependent Claim
23 words
The exit sign in accordance with claim 24, wherein said printed circuit board is positioned in said enclosure of said lighting device housing.
Claim 28
Dependent Claim
19 words
The exit sign in accordance with claim 24, wherein said printed circuit board is part of said illumination means.
Claim 29
Dependent Claim
21 words
The exit sign in accordance with claim 24, wherein said printed circuit board has electrical components thereon for said illumination means.
Claim 30
Dependent Claim
34 words
The exit sign in accordance with claim 17, further including an emergency electric power supply to provide auxiliary power to said light emitting diodes in event of failure of the primary electrical power source.
Claim 31
Dependent Claim
53 words
The exit sign in accordance with claim 28, wherein said emergency electric power supply includes at least one rechargeable battery, a charging device for keeping said at least one rechargeable battery fully charged during periods of nonuse and circuit for switching between said emergency electric power supply and the primary electrical power source.
Claim 32
Dependent Claim
21 words
The exit sign in accordance with claim 28, wherein said emergency electrical power supply is mounted within said lighting device housing.
Claim 33
Dependent Claim
43 words
The exit sign in accordance with claim 28, wherein said emergency electric power circuit operationally connected to said primary electric power circuit to detect failure of the primary electrical power source and thereafter provided auxiliary power to said at least one lighting device.
Claim 34
Dependent Claim
36 words
The exit sign in accordance with claim 17, further including a rectifying circuit in said lighting device housing for rectifying electrical power from the primary electrical power source into direct current for powering said illumination means.
Claim 35
Dependent Claim
49 words
The exit sign in accordance with claim 17, a mounting base assembly on said lighting device housing for electrically connecting said illumination means to an electrical socket in said lighting device housing, said mounting base assembly matingly received in said electrical socket through relative rotational and axial movement therebetween.
Claim 36
Dependent Claim
26 words
The exit sign in accordance with claim 33, wherein said mounting base assembly permits orientation of said lighting device housing relative to said mounting base assembly.
Claim 37
Dependent Claim
31 words
The exit sign in accordance with claim 17, wherein said at least one lighting device is two lighting devices spaced from one another within said enclosure to fully illuminate said indicia.
Claim 38
Dependent Claim
22 words
The exit sign in accordance with claim 35, wherein said two lighting devices have their respective light emitting diodes facing one another.
Claim 39
Dependent Claim
24 words
The exit sign in accordance with claim 35, wherein said two lighting devices have their respective light emitting diodes facing away from one another.
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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) | 1998-10-23 | 1999-04-24 | 1999-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-10-23 | 2003-04-24 | 2003-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-10-23 | 2007-04-24 | 2007-10-24 | $7700.00 | Window Closed / Lapsed |