Patent US4931910A successfully refreshed from Google Patents.
US4931910A
Expired / Lapsed
US
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Lighting devices
Assignee: SAUNDERS-ROE DEVELOPMENTS Ltd
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Filing: 1989-02-24
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Granted: 1990-06-05
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Expires: 2009-02-24
Abstract
Abstract A lighting device comprises a cylindrical light carrier having a plurality of tubular self luminous light sources attached longitudinally along a surface and throughout a major arc of its circumference. In one embodiment the lighting device includes a parabolic reflector.
Inventors
- 👤 Kenneth F. Wills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:51
CPC Classifications
F; F21; F21V; F21V7/00; F21V7/005; F21K; F21K99/00; F21V17/00; F21V17/04; F21V7/04; F21V7/06; F21Y; F21Y2103/00; G; G02; G02B; G02B6/00; G02B6/0001
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
68 words
A lighting device comprising a light carrier of tubular form defining an internal cylindrical surface and an external cylindrical surface, and a plurality of tubular self luminous light sources each having a smaller outside diameter than the outside diameter of the tubular carrier attached longitudinally along one of said cylindrical surfaces of the carrier and through at least a major arc of the circumference of said one surface.
Claim 2
Dependent Claim
68 words
A lighting device comprising a light carrier of tubular form defining an internal cylindrical surface and an external cylindrical surface, and a plurality of tubular self luminous light sources each having a smaller outside diameter than the outside diameter of the tubular carrier attached longitudinally along one of said cylindrical surfaces of the carrier and through at least a major arc of the circumference of said one surface.
Claim 3
Dependent Claim
22 words
A lighting device as claimed in claim 1, wherein the light sources are located on the external surface of the tubular carrier.
Claim 4
Dependent Claim
16 words
A light device as claimed in claim 2, wherein the external surface is a reflective surface.
Claim 5
Dependent Claim
23 words
A lighting device as claimed in claim 1, wherein the light sources are located longitudinally along the internal surface of the tubular carrier.
Claim 6
Dependent Claim
25 words
A lighting device as claimed in claim 4, wherein said light sources are retained by clear adhesive in a space internally of the light carrier.
Claim 7
Dependent Claim
33 words
A lighting device as claimed in claim 1, wherein the tubular carrier is supported in a parabolic reflector with a geometral centre of the carrier coincident with an optical centre of the parabola.
Claim 8
Dependent Claim
25 words
A lighting device as claimed in claim 1, wherein said light sources are disposed in contiguous array along said one surface of said tubular carrier.
Claim 9
Dependent Claim
71 words
A lighting device comprising a parabolic reflector having an optical centre, a transparent light carrier of tubular form supported in the reflector with its geometral centre coincident with said optical centre, and a plurality of tubular self luminous light sources having a smaller outside diameter than an outside diameter of said tubular carrier attached longitudinally along a surface of the carrier and through at least a major arc of its circumference.
Claim 10
Dependent Claim
71 words
A lighting device comprising a parabolic reflector having an optical centre, a transparent light carrier of tubular form supported in the reflector with its geometral centre coincident with said optical centre, and a plurality of tubular self luminous light sources having a smaller outside diameter than an outside diameter of said tubular carrier attached longitudinally along a surface of the carrier and through at least a major arc of its circumference.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-04 | 1993-12-04 | 1994-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-04 | 1997-12-04 | 1998-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-04 | 2001-12-04 | 2002-06-05 | $7700.00 | Window Closed / Lapsed |