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Patent US3963327A successfully refreshed from Google Patents.
US3963327A
Expired / Lapsed
US
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Device for operating frusto-conical optical concentrators
Assignee: ULNIC FRANCE
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Filing: 1974-11-25
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Granted: 1976-06-15
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Expires: 1994-11-25
Abstract
Abstract A device for operating frusto-conical optical concentrators made of a refringent material of refractive index n, the major base of which is in the vicinity of a source S, said device comprising, at the upper portion of a frustum of a cone, a frusto-conical reflector surrounding said frustum over a given height along the frustum axis of symmetry, the inner surface of said frusto-conical reflector being parallel to the frustum lateral surface and located at a small distance therefrom, and said given height being at least equal to the ordinate of a point A as measured along the frustum axis of symmetry from the apex of said frustum, point A being the point at which the ray emitted by source S which is the most inclined with respect to the frustum axis of symmetry, undergoes its first reflection on the frustum surface, at an angle to the normal to the frusto-conical lateral surface at point A, said angle being smaller than the angle of total reflection.
Inventors
- 👤 Albert Poirier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:00
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/008; G02B19/00; G02B19/0004; G02B19/0028; G02B19/0033; G02B19/0047; G02B5/00; G02B6/00; G02B6/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
167 words
A device for operating frusto-conical optical concentrators made of a refringent material of refractive index, n, the major base of which is in the vicinity of a source S, said device comprising, at the upper portion of a frustum of a cone, a frusto-conical reflector surrounding said frustum over a given height along the frustum axis of symmetry, the inner surface of said frusto-conical reflector being parallel to the frustum lateral surface and located at a small distance therefrom, and said given height being at least equal to the ordinate of a point A as measured along the frustum axis of symmetry from the apex of said frustum, point A being the point at which the ray emitted by source S, which is the most inclined ray with respect to the frustum axis of symmetry, undergoes its first reflection on the frustum surface at an angle to the normal to the frusto-conical lateral surface at point A, said angle being smaller than the angle of total reflection.
Claim 2
Independent Claim
167 words
A device for operating frusto-conical optical concentrators made of a refringent material of refractive index, n, the major base of which is in the vicinity of a source S, said device comprising, at the upper portion of a frustum of a cone, a frusto-conical reflector surrounding said frustum over a given height along the frustum axis of symmetry, the inner surface of said frusto-conical reflector being parallel to the frustum lateral surface and located at a small distance therefrom, and said given height being at least equal to the ordinate of a point A as measured along the frustum axis of symmetry from the apex of said frustum, point A being the point at which the ray emitted by source S, which is the most inclined ray with respect to the frustum axis of symmetry, undergoes its first reflection on the frustum surface at an angle to the normal to the frusto-conical lateral surface at point A, said angle being smaller than the angle of total reflection.
Claim 3
Dependent Claim
88 words
A device according to claim 1, wherein the apparatus for positioning said reflector comprises: a cylindrical tube threaded at the lower portion thereof, to which is attached a reflector, a threaded ring, the diameter of which is smaller than of frustum, adapted to be threadedly engaged with the lower portion of tube and provided with a shoulder, a seal pressing against the shoulder of said threaded ring, a counter-ring adapted to be threaded to the upper end of said threaded ring and to crush said seal against frustum.
Claim 4
Dependent Claim
80 words
A device according to claim 1 wherein the apparatus for positioning said reflector comprises: a cylindrical tube, externally threaded at the lower portion thereof, to which is attached a reflector, a spring surrounding frustum, an end of which presses against the base of said reflector, an approximately frusto-conical shim fixed to end of said spring, a threaded ring, the inner diameter of which is smaller than the diameter of said frustum, in threaded relation with the lower portion of tube.
Claim 5
Dependent Claim
28 words
A device according to claim 2, comprising means for causing pressurized cold air to flow in the vicintiy of said frustum of a cone and of said reflector.
Claim 6
Dependent Claim
17 words
A device according to claim 4, wherein said cylindrical tube comprises openings in the lateral walls thereof.
Claim 7
Dependent Claim
18 words
A device according to claim 2, wherein said threaded ring is serrated in the plane horizontal portion thereof.
References Cited (Backward Citations)
US3263070A
Cited
US3604802A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |