Patent US4531180A successfully refreshed from Google Patents.
US4531180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal shield for trough-like reflector
Assignee: WIDE-LITE INTERNATIONAL Corp A CORP OF DE
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Filing: 1980-12-17
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Granted: 1985-07-23
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Expires: 2000-12-17
Abstract
Abstract A lighting fixture having a trough-type reflector and further having planar end reflectors, such fixture also including at least one planar shield parallel to the long axis of the trough-type reflector and having an edge parallel to the aiming axis of the fixture. The shield is undercut to permit light emanations from the lamp to be reflected from the entire trough-type reflector. The shield also includes depending points at the points of contact with the end reflectors, thereby preventing light from being reflected from the end reflectors outside of the shield.
Inventors
- 👤 Jose A. Hernandez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:19
CPC Classifications
F; F21; F21V; F21V13/00; F21V13/02; F21V13/10; F21V11/00; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
166 words
A lighting fixture for mounting therein a lamp having an elongate axis, comprising a housing at least partially surrounding the elongate axis of the lamp so as to leave an opening on one side thereof for light emanations, a parabolic reflector positioned within said housing to cause parallel light emanations through said housing opening from primary light reflections, at least one end reflector cutting across the elongate lamp axis for radiating primary light reflections from the lamp through said opening, and a light spill shield parallel to the lamp axis and to one side thereof having a cross-section parallel to the parabolic reflector emanations, said shield including an undercut opening for permitting primary light reflections from the lamp over substantially the entire parabolic reflector on the other side of said shield from the lamp, said shield having a depending portion for shielding against primary reflections emanating through the opening from that portion of said end reflector on the other side of said shield from the lamp.
Claim 2
Dependent Claim
166 words
A lighting fixture for mounting therein a lamp having an elongate axis, comprising a housing at least partially surrounding the elongate axis of the lamp so as to leave an opening on one side thereof for light emanations, a parabolic reflector positioned within said housing to cause parallel light emanations through said housing opening from primary light reflections, at least one end reflector cutting across the elongate lamp axis for radiating primary light reflections from the lamp through said opening, and a light spill shield parallel to the lamp axis and to one side thereof having a cross-section parallel to the parabolic reflector emanations, said shield including an undercut opening for permitting primary light reflections from the lamp over substantially the entire parabolic reflector on the other side of said shield from the lamp, said shield having a depending portion for shielding against primary reflections emanating through the opening from that portion of said end reflector on the other side of said shield from the lamp.
Claim 3
Dependent Claim
26 words
A lighting fixture in accordance with claim 1, wherein said end reflector joins said parabolic reflector in a curvilinear line substantially perpendicular to the lamp axis.
Claim 4
Dependent Claim
49 words
A lighting fixture in accordance with claim 1, and including a second end reflector located at the opposite end of the lamp from said first-named end reflector, said second end reflector cutting across the elongate lamp axis for radiating primary light reflections from the lamp through said housing opening.
Claim 5
Dependent Claim
44 words
A lighting fixture in accordance with claim 3, wherein said shield has a second depending portion for shielding against primary reflections emanating through the housing opening from that portion of said second end reflector on the other side of said shield from the lamp.
Claim 6
Dependent Claim
113 words
A lighting fixture in accordance with claim 1, and including a second spill light shield parallel to the lamp axis and to the other side thereof from the position of said first-named spill light shield, said second shield having a cross-section parallel to the parabolic reflector emanations, said second shield including an undercut opening for permitting primary light reflections from the lamp over substantially the entire parabolic reflector on the other side of said second shield from the lamp, said second shield having a depending portion for shielding against primary reflections emanating through the housing opening from that portion of said end reflector on the other side of said shield from the lamp.
Claim 7
Dependent Claim
231 words
A lighting fixture in accordance with claim 1, and including a second end reflector located at the opposite end of the lamp from said first-named end reflector, said second end reflector cutting across the elongate lamp axis for radiating primary light reflections from the lamp through said housing opening, said first-named spill light shield having a second depending portion for shielding against primary reflections emanating through the housing opening from that portion of said second end reflector on the other side of said shield from the lamp, and a second spill light shield parallel to the lamp axis and to the other side thereof from the position of said first-named spill light shield, said second shield having a cross-section parallel to the parabolic reflector emanations, said second shield including an undercut opening for permitting primary light reflections from the lamp over substantially the entire parabolic reflector on the other side of said second shield from the lamp, said second shield having a first depending portion for shielding against primary reflections emanating through the housing opening from that portion of said first-named end reflector on the other side of said second shield from the lamp, said second shield having a second depending portion for shielding against primary reflections emanating through the housing opening from that portion of said second end reflector on the other side of said second shield from the lamp.
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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) | 1988-07-22 | 1989-01-21 | 1989-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-22 | 1993-01-21 | 1993-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-22 | 1997-01-21 | 1997-07-23 | $7700.00 | Window Closed / Lapsed |