US4035064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light concentrator having an anticlastic reflective surface
Assignee: 3M Co
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Filing: 1975-03-20
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Granted: 1977-07-12
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Expires: 1995-03-20
Abstract
Abstract Devices for concentrating radiant energy and having reflective anticlastic surfaces, produced by processes involving shrinking an elastic reflective film onto a rigid frame representing one or a series of twisted squares, or by twisting a semi-rigid elastic reflective panel.
Inventors
- 👤 Charles D. Cowman, Jr.
- 👤 John P. G. Shepherd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:05
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/08; G02B5/10; B; B29; B29D; B29D11/00; B29D11/00596; F; F24; F24S; F24S23/00; F24S23/70; F24S23/81; Y; Y02; Y02E; Y02E10/00; Y02E10/40
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
16 words
A rigid light-concentrator body having a reflective continuous hyperbolic paraboloidal anticlastic surface providing a linear focus.
Claim 2
Dependent Claim
16 words
A rigid light-concentrator body having a reflective continuous hyperbolic paraboloidal anticlastic surface providing a linear focus.
Claim 3
Dependent Claim
27 words
A device for utilization of radiant energy including at least one rigid body as defined in claim 1 and an energy converting medium disposed along said focus.
Claim 4
Dependent Claim
25 words
Device of claim 2 wherein a plurality of said rigid bodies are disposed in series and focused in overlapping relation along a common focal line.
Claim 5
Dependent Claim
64 words
An article having an anticlastic surface and comprising an elastic web having a specular reflective surface, spaced elongate rigid support members attached to opposite ends of said web and angularly offset about their mutual axis supporting said web for said reflective surface to occupy a minimum surface area between said supports and to have essentially straight lines connecting corresponding ends of said support members.
Claim 6
Dependent Claim
64 words
An article having an anticlastic surface and comprising an elastic web having a specular reflective surface, spaced elongate rigid support members attached to opposite ends of said web and angularly offset about their mutual axis supporting said web for said reflective surface to occupy a minimum surface area between said supports and to have essentially straight lines connecting corresponding ends of said support members.
Claim 7
Dependent Claim
24 words
Article of claim 4 wherein said lines are represented by rigid side supports for said web rigidly interconnected with said angularly offset support members.
Claim 8
Dependent Claim
18 words
Article of claim 4 wherein said reflective surface defines a linear focus for substantially parallel radiation incident thereon.
Claim 9
Dependent Claim
32 words
Article of claim 6 wherein said elastic web is semirigid and the angular offset of the support members produce a specific twist deformation not greater than twice the thickness of said web.
Claim 10
Dependent Claim
15 words
Article of claim 6 wherein said supports are angularly adjustable to provide a variable focus.
Claim 11
Dependent Claim
13 words
Article of claim 6 including an energy converting medium disposed along said focus.
Claim 12
Dependent Claim
32 words
Article of claim 4 wherein said reflective surface comprises incremental linear components perpendicular to the convex parabolic diagonal and angularly disposed with respect to the anticlastic surface to provide a point focus.
Claim 13
Dependent Claim
65 words
A radiation-concentrator reflector comprising a frame having a plurality of rigid interconnected sides and each having an edge, the surface of said edges define an infinite number of points and an anticlastic surface, and a specularly reflectorized elastic web rigidly attached to the edge surfaces of said frame and defining a minimum surface area connecting said edges and a reflective surface providing a linear focus.
Claim 14
Dependent Claim
65 words
A radiation-concentrator reflector comprising a frame having a plurality of rigid interconnected sides and each having an edge, the surface of said edges define an infinite number of points and an anticlastic surface, and a specularly reflectorized elastic web rigidly attached to the edge surfaces of said frame and defining a minimum surface area connecting said edges and a reflective surface providing a linear focus.
References Cited (Backward Citations)
DE1476717A1
Cited
US3574447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |