US4462068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luminaire with improved lens structure
Assignee: Johns Manville
•
Filing: 1982-06-24
•
Granted: 1984-07-24
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Expires: 2002-06-24
Abstract
Abstract A new and improved luminaire combination is disclosed having a novel lens structure formed with a generally horizontal first lens surface and a generally vertical second lens surface with a generally horizontal flange formed on the second lens surface. The first lens surface is designed to refract a beam of light downwardly and outwardly in a predetermined pattern to form a beam having a cross section approximating the predetermined pattern at a predetermined distance below the lens. The second lens surface is designed to diffuse a beam of light outwardly in a direction perpendicular to the second lens surface.
Inventors
- 👤 Jan Shadwick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:38
CPC Classifications
F; F21; F21V; F21V5/00; F21V5/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
258 words
A lens structure for a lighting fixture, comprising: a generally horizontal first lens surface divided into four triangular shaped quadrants, said first lens surface having formed thereon means for refracting a beam of light downwardly and outwardly in a predetermined pattern to form a beam having a cross section approximating the predetermined pattern at a predetermined distance below the lens; said refracting means including: prismatic refractor elements in each quadrant, the refractive elements of each quadrant extending parallel to the bisector of each triangular shaped quadrant; light diffusing elements positioned between the prismatic refractor elements; and said first lens surface prismatic refractor elements being formed at the angle according to the following tabulation and said light diffusing elements being formed at the radius according to the following tabulation: ______________________________________
Prism Element Angle Radius
______________________________________
1 53.8°
2 .243"
3 54.7°
4 .243"
5 55.4°
6 .243"
7 56.3°
8 .243"
9 57.2°
10 .243"
11 58°
12 .243"
13 59°
14 .243"
15 60°
16 .243"
17 60.9°
18 .243"
19 61.7°
20 .243"
21 62.5°
22 .243"
23 63.3°
24 .243"
25 64°
26 .243"
27 64.8°
28 .243"
29 65.7°
30 .243"
31 66.5°
32 .243"
33 67.2°
34 .243"
35 67.9°
36 .243"
37 68.6°
______________________________________ a generally vertical second lens surface formed on the first lens surface and around the periphery thereof and having formed thereon means to diffuse a beam of light outwardly; and a generally horizontal flange formed on the second lens surface for mounting the lens structure in the lighting fixture.
Claim 2
Dependent Claim
258 words
A lens structure for a lighting fixture, comprising: a generally horizontal first lens surface divided into four triangular shaped quadrants, said first lens surface having formed thereon means for refracting a beam of light downwardly and outwardly in a predetermined pattern to form a beam having a cross section approximating the predetermined pattern at a predetermined distance below the lens; said refracting means including: prismatic refractor elements in each quadrant, the refractive elements of each quadrant extending parallel to the bisector of each triangular shaped quadrant; light diffusing elements positioned between the prismatic refractor elements; and said first lens surface prismatic refractor elements being formed at the angle according to the following tabulation and said light diffusing elements being formed at the radius according to the following tabulation: ______________________________________
Prism Element Angle Radius
______________________________________
1 53.8°
2 .243"
3 54.7°
4 .243"
5 55.4°
6 .243"
7 56.3°
8 .243"
9 57.2°
10 .243"
11 58°
12 .243"
13 59°
14 .243"
15 60°
16 .243"
17 60.9°
18 .243"
19 61.7°
20 .243"
21 62.5°
22 .243"
23 63.3°
24 .243"
25 64°
26 .243"
27 64.8°
28 .243"
29 65.7°
30 .243"
31 66.5°
32 .243"
33 67.2°
34 .243"
35 67.9°
36 .243"
37 68.6°
______________________________________ a generally vertical second lens surface formed on the first lens surface and around the periphery thereof and having formed thereon means to diffuse a beam of light outwardly; and a generally horizontal flange formed on the second lens surface for mounting the lens structure in the lighting fixture.
Claim 3
Dependent Claim
25 words
The lens structure as defined in claim 1 further comprising the triangular shaped quadrants being sloped approximately 3° from the plane of the flange surface.
Claim 4
Dependent Claim
51 words
The lens structure as defined in claim 1 further comprising the refractor elements and the light diffusing elements being positioned inside the lens structure with the outside of the lens structure being formed as a generally smooth surface thereby aiding in the cleaning of the lens structure on the outside thereof.
Claim 5
Dependent Claim
20 words
The lens structure as defined in claim 1 wherein the first lens surface is formed in a generally square shape.
Claim 6
Dependent Claim
21 words
The lens structure as defined in claim 1 further comprising the first lens surface being formed in a generally rectangular shape.
Claim 7
Dependent Claim
21 words
The lens structure as defined in claim 1 further comprising the first lens surface being formed in a generally round shape.
Claim 8
Dependent Claim
21 words
The lens structure as defined in claim 1 further comprising the first lens surface being formed in a generally oval shape.
Claim 9
Dependent Claim
21 words
The lens structure as defined in claim 1 further comprising the second lens surface being formed as a three-surface fluted configuration.
References Cited (Backward Citations)
CA592907A
Cited
US3668381A
Cited
US3721818A
Cited
US4234912A
Cited
US4285034A
Cited
US4368504A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-24 | 1988-01-23 | 1988-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-24 | 1992-01-23 | 1992-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-24 | 1996-01-23 | 1996-07-24 | $7700.00 | Window Closed / Lapsed |