US5136491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflector for a lamp and method of determining the form of a reflector
Assignee: Individual
•
Filing: 1990-06-12
•
Granted: 1992-08-04
•
Expires: 2010-06-12
Abstract
Abstract A reflector for a lamp has a form which in a section containing the optical axis 1 lies between two curves enveloping the reflector section curve R. The enveloping curves may be two ellipses, two parabolas or an ellipse and a parabola.
Inventors
- 👤 Tetsuhiro Kano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:30
CPC Classifications
F; F21; F21V; F21V7/00; F21V7/04; F21V7/09; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
90 words
A reflector for a lamp which is formed as a portion of a solid revolution, the generatrix of the solid of revolution being formed by a generating curve which is not of conic form and which does not comprise conic sections, wherein said generating curve lies between two enveloping curves which are of conic section type, wherein a distance ratio k at any point on said generating curve with respect to said enveloping curves varies in dependence upon the distance of said point from the vertex of said generating curve.
Claim 2
Dependent Claim
90 words
A reflector for a lamp which is formed as a portion of a solid revolution, the generatrix of the solid of revolution being formed by a generating curve which is not of conic form and which does not comprise conic sections, wherein said generating curve lies between two enveloping curves which are of conic section type, wherein a distance ratio k at any point on said generating curve with respect to said enveloping curves varies in dependence upon the distance of said point from the vertex of said generating curve.
Claim 3
Dependent Claim
18 words
A reflector according to claim 1, wherein the two enveloping curves are of the same conic section type.
Claim 4
Dependent Claim
17 words
The reflector according to claim 1, wherein the two enveloping curves are of different conic section type.
Claim 5
Dependent Claim
16 words
The reflector according to claim 1, wherein the focal points of the two enveloping curves coincide.
Claim 6
Dependent Claim
18 words
The reflector according to claim 1, wherein the vertices of the two enveloping curves lie on each other.
Claim 7
Dependent Claim
17 words
The reflector according to claim 1, wherein the vertices of the two enveloping curves are spaced apart.
Claim 8
Dependent Claim
40 words
The reflector according to claim 1, wherein the base angles of a triangle formed by a light beam incident on the reflector edge and the light beam associated therewith reflected at the reflector edge and the optical axis are equal.
Claim 9
Dependent Claim
13 words
The reflector according to claim 1, wherein the generating curve is smoothly differentiable.
Claim 10
Dependent Claim
79 words
A reflector for a lamp which is formed as a portion of a solid of revolution, the generatrix of the solid of revolution being formed by a generating curve which is not of conic form and which does not comprise conic sections, wherein said generating curve lies between two enveloping curves which are of different conic section type and where the distance ratio k at any point on said generating curve with respect to said enveloping curves is constant.
Claim 11
Dependent Claim
79 words
A reflector for a lamp which is formed as a portion of a solid of revolution, the generatrix of the solid of revolution being formed by a generating curve which is not of conic form and which does not comprise conic sections, wherein said generating curve lies between two enveloping curves which are of different conic section type and where the distance ratio k at any point on said generating curve with respect to said enveloping curves is constant.
Claim 12
Dependent Claim
16 words
The reflector according to claim 9, wherein the focal points of the two enveloping curves coincide.
Claim 13
Dependent Claim
18 words
The reflector according to claim 9, wherein the vertices of the two enveloping curves lie on each other.
Claim 14
Dependent Claim
17 words
The reflector according to claim 9, wherein the vertices of the two enveloping curves are spaced apart.
Claim 15
Dependent Claim
40 words
The reflector according to claim 9, wherein the base angles of a triangle formed by a light beam incident on the reflector edge and the light beam associated therewith reflected at the reflector edge and the optical axis are equal.
Claim 16
Dependent Claim
13 words
The reflector according to claim 9, wherein the generating curve is smoothly differentiable.
Claim 17
Dependent Claim
83 words
A reflector for a lamp which is channel shaped, the generatrix of said channel-shape being formed by a generating curve which is not of conic form and which does not comprise conic sections, wherein said generating curve lies between two enveloping curves which are of conic section type, wherein a distance ratio k at any point on said generating curve with respect to said enveloping curves varies in dependence upon the radial distance of said point from the vertex of said generating curve.
Claim 18
Dependent Claim
83 words
A reflector for a lamp which is channel shaped, the generatrix of said channel-shape being formed by a generating curve which is not of conic form and which does not comprise conic sections, wherein said generating curve lies between two enveloping curves which are of conic section type, wherein a distance ratio k at any point on said generating curve with respect to said enveloping curves varies in dependence upon the radial distance of said point from the vertex of said generating curve.
Claim 19
Dependent Claim
18 words
The reflector according to claim 15, wherein the two enveloping curves are of the same conic section type.
Claim 20
Dependent Claim
17 words
The reflector according to claim 15, wherein the two enveloping curves are of different conic section type.
Claim 21
Dependent Claim
43 words
The reflector according to claim 15, wherein said generating curve lies between two enveloping curves which are of different conic section type and where the distance ratio k at any point on said generating curve with respect to said enveloping curves is constant.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-08-04 | 1996-02-03 | 1996-08-04 | $2000.00 | Window Closed / Lapsed |
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