US5315490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light fittings
Assignee: Individual
•
Filing: 1990-10-12
•
Granted: 1994-05-24
•
Expires: 2010-10-12
Abstract
Abstract A light fitting for a high intensity source has a reflector (10) specifically adapted to give a beam of a predetermined shape. An aperture (16) is provided through the reflector at a zone where a majority of the light from the source and impinging on that zone is reflected back towards the source, and a fibre optic coupler (14) fitted the end of a fibre optic loom (15) is mounted to cooperate with the aperture, to receive light from the source and which would otherwise be reflected back to the source. The projected beam from the fitting is thus hardly affected, and the fibres of the loom can be arranged to provide distracting secondary sources in the vicinity of the fitting.
Inventors
- 👤 Rodney C. Bastable
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:33
CPC Classifications
F; F21; F21V; F21V7/00; F21V7/04; F21V7/09; G; G02; G02B; G02B6/00; G02B6/0001; G02B6/0005; G02B6/0006
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
182 words
A light fitting for display illumination to provide a primary light source and at least one secondary light source, comprising a holder for a high intensity light source and a reflector specifically adapted for use with a held source and juxtaposed with respect to the holder whereby a held source will provide a beam of a predetermined configuration, there being an orifice formed through the reflector and the light fitting includes a fibre optic loom having a plurality of optic fibres and having an end coupler which is mounted to co-operate with the orifice so that light from a held source will be incident on the end face of the coupler to enter the optical fibers of the loom, characterized in that the orifice is formed through the reflector at a site where a majority of the light from a held source and impinging on that site does not contribute significantly to the resultant beam produced by the reflector, and wherein distal ends of some of the optical fibres of the loom are provided with lenses, small translucent globes or the like.
Claim 2
Dependent Claim
182 words
A light fitting for display illumination to provide a primary light source and at least one secondary light source, comprising a holder for a high intensity light source and a reflector specifically adapted for use with a held source and juxtaposed with respect to the holder whereby a held source will provide a beam of a predetermined configuration, there being an orifice formed through the reflector and the light fitting includes a fibre optic loom having a plurality of optic fibres and having an end coupler which is mounted to co-operate with the orifice so that light from a held source will be incident on the end face of the coupler to enter the optical fibers of the loom, characterized in that the orifice is formed through the reflector at a site where a majority of the light from a held source and impinging on that site does not contribute significantly to the resultant beam produced by the reflector, and wherein distal ends of some of the optical fibres of the loom are provided with lenses, small translucent globes or the like.
Claim 3
Dependent Claim
39 words
A light fitting according to claim 1, characterised in that the orifice is provided at a site in the reflector where a majority of light from a held source impinging on that site is reflected back to said source.
Claim 4
Dependent Claim
23 words
A light fitting according to claim 2, characterised in that the orifice is provided at the rear of the reflector, behind the source.
Claim 5
Dependent Claim
88 words
A light fitting according to claim 1, characterised in that the fibre optic coupler is mounted at a position selected from: a) a position where the coupler projects through the orifice in the reflector, to collect light from within the reflector; b) a position where the coupler is outside the reflector, to receive light which first passes through the orifice; and c) a position where the end face of the fibre optic coupler is substantially co-planar with the reflector inner surface, in the region immediately surrounding the orifice.
Claim 6
Independent Claim
151 words
A method of providing secondary light sources in the vicinity of a light fitting having a holder for a high intensity light source and a reflector specifically adapted for use with a held source to provide a beam of a predetermined configuration, characterised in that a region of the reflector is identified where a majority of the light from the source and impinging on that region is reflected back to the light source, an orifice is formed in the reflector in said region, the end coupler of a fibre optic loom having a plurality of optical fibres is positioned to co-operate with the orifice to receive light from the source, and the distal ends of the optical fibres in the loom are arranged to provide secondary light sources, and wherein distal ends of some of the optical fibres of the loom are provided with lenses, small translucent globes or the like.
Claim 7
Independent Claim
151 words
A method of providing secondary light sources in the vicinity of a light fitting having a holder for a high intensity light source and a reflector specifically adapted for use with a held source to provide a beam of a predetermined configuration, characterised in that a region of the reflector is identified where a majority of the light from the source and impinging on that region is reflected back to the light source, an orifice is formed in the reflector in said region, the end coupler of a fibre optic loom having a plurality of optical fibres is positioned to co-operate with the orifice to receive light from the source, and the distal ends of the optical fibres in the loom are arranged to provide secondary light sources, and wherein distal ends of some of the optical fibres of the loom are provided with lenses, small translucent globes or the like.
Claim 8
Dependent Claim
30 words
A method according to claim 5, characterised in that the end face of the fibre optic coupler is arranged externally of the reflector to receive light passing through the orifice.
Claim 9
Dependent Claim
26 words
A method according to claim 5, characterised in that the end face of the fibre optic coupler is arranged within or generally co-planar with the reflector.
References Cited (Backward Citations)
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Cited
US3626170A
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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) | 1997-05-23 | 1997-11-22 | 1998-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-23 | 2001-11-22 | 2002-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-23 | 2005-11-22 | 2006-05-24 | $7700.00 | Window Closed / Lapsed |