Patent FR803405A successfully refreshed from Google Patents.
US4105293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting installation based on light guide
Assignee: Individual
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Filing: 1976-08-25
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Granted: 1978-08-08
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Expires: 1996-08-25
Abstract
Abstract A lighting installation based on a light guide, comprising a light guide having two surfaces, one of said surfaces is presented to the space being lighted, and at least one light source positioned in an input device including an optical unit directing the luminous flux of the light source into the light guide. The surfaces of the light guide are arranged at an acute angle to each other, which is determined by the dimensions of the lighted space and rated illumination, and one of said surfaces is made light reflective and the other, facing the lighted space, is provided with alternating light transmitting and reflective zones.
Inventors
- 👤 Julian B. Aizenberg
- 👤 Inokh B. Bukhman
- 👤 Vladimir M. Pyatigorsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:36
CPC Classifications
F; F21; F21S; F21S2/00; G; G02; G02B; G02B6/00; G02B6/0001; G02B6/0011; G02B6/0013; G02B6/0023; G02B6/0031; G02B6/0033; G02B6/0035; G02B6/0045; G02B6/005; G02B6/0055; F21Y; F21Y2103/00; G02B6/0096
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
134 words
A lighting installation based on a light guide, which comprises: a light guide having two surfaces; a means for securing the light guide in a room to be lighted; at least one light source; at least one input device inluding an optical unit; each of said light sources placed in said input device and directing the luminous flux of said light source into said light guide; said first surface of said light guide reflecting said light; said second surface of said light guide facing said lighted room and provided with alternating light transmitting and light reflective zones; and said first and second surfaces of said light guide are positioned at an acute angle to each other, the magnitude of said angle being dependent upon the dimensions of said lighted room and the rated illumination.
Claim 2
Dependent Claim
134 words
A lighting installation based on a light guide, which comprises: a light guide having two surfaces; a means for securing the light guide in a room to be lighted; at least one light source; at least one input device inluding an optical unit; each of said light sources placed in said input device and directing the luminous flux of said light source into said light guide; said first surface of said light guide reflecting said light; said second surface of said light guide facing said lighted room and provided with alternating light transmitting and light reflective zones; and said first and second surfaces of said light guide are positioned at an acute angle to each other, the magnitude of said angle being dependent upon the dimensions of said lighted room and the rated illumination.
Claim 3
Dependent Claim
26 words
A lighting installation as claimed in claim 1 wherein for cylindrical lighted spaces one of said surfaces of said light guide is made as a cone.
Claim 4
Dependent Claim
41 words
A lighting installation as claimed in claim 1, including initial portions of said light guide positioned on the side of said light sources; and said initial portions of said light guide are extensions of said optical unit of said input device.
Claim 5
Dependent Claim
53 words
A lighting installation as claimed in claim 1, wherein said first surface of said light guide and said reflective zones of said second surface of said light guide are made of a metallized polyethylene/terephtalate film; and said transmitting zones of said second surface of said light guide are of a non-metallized polyethylene/terephtalate film.
Claim 6
Dependent Claim
41 words
A lighting installation as claimed in claim 2, including initial portions of said light guide positioned on the side of said light sources; and said initial portions of said light guide are extensions of said optical unit of said input device.
Claim 7
Dependent Claim
54 words
A lighting installation as claimed in claim 2, wherein said first surface of said light guide and said reflective zones of said second surface of said light guide are made of a metallized polyethylene/terephtalate film; and said transmitting zones of said second surface of said light guide are made of a non-metallized polyethylene/terephthalate film.
Claim 8
Dependent Claim
54 words
A lighting installation as claimed in claim 5, wherein said first surface of said light guide and said reflective zones of said second surface of said light guide are made of a metallized polyethylene/terephthalate film; and said transmitting zones of said second surface or said light guide are made of a non-metallized polyethylene/terephthalate film.
Claim 9
Dependent Claim
20 words
A lighting installation as claimed in claim 1, wherein said light transmitting and light reflective zones form alternating striped areas.
Claim 10
Dependent Claim
20 words
A lighting installation as claimed in claim 8, wherein said alternating striped areas are in the form of parallel stripes.
Claim 11
Dependent Claim
21 words
A lighting installation as claimed in claim 8, wherein said alternating striped areas are in the form of alternating concentric stripes.
Claim 12
Dependent Claim
25 words
A lighting installation as claimed in claim 1, wherein said light transmitting and light reflective zones form a decorative pattern of substantially alternating striped areas.
References Cited (Backward Citations)
US3491245A
Cited
US3902056A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-08-07 | 1982-02-06 | 1982-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-07 | 1986-02-06 | 1986-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-07 | 1990-02-06 | 1990-08-08 | $7700.00 | Window Closed / Lapsed |