US4404620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luminaire
Assignee: Toshiba Electric Equipment Corp
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Filing: 1980-12-04
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Granted: 1983-09-13
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Expires: 2000-12-04
Abstract
Abstract A luminaire comprises a light source and a reflector which has an opening for emitting light and an apex opposed the opening, and which reflects light emitted from the light source in a desired direction. The reflector having a first area at the intermediate portion between the opening and the apex thereof consisting of a plurality of reflecting surface units with inclined surfaces located at both sides thereof, and a second area disposed at least partially between the intermediate portion and the opening consisting of hammer tone finished reflecting surfaces formed at least partially on a portion located nearer to the opening for emitting light than the first area is located to.
Inventors
- 👤 Sadao Takahashi
- 👤 Nobuo Matsushita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:25
CPC Classifications
F; F21; F21V; F21V7/00; F21V7/04; F21V7/09
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
240 words
A luminaire comprising: a light source; a reflector surrounding said light source and reflecting light emitted by said light source to a desired direction; said reflector including a first region formed on an inner surface of said reflector located at a first position adjacent a light projecting end portion; a second region formed on said inner surface of said reflector located between said first region and a second position adjacent a base end portion of said reflector and having a smooth reflecting surface; a plurality of substantially identical reflecting surface units positioned in said second region, each having slanted opposite side portions which intersect each other, wherein said plurality of reflecting surface units are arranged in a circumferential direction at fixed intervals such that a plurality of smooth reflecting surface portions are defined between each two adjacent reflecting surface units and each connect said first and second positions and wherein a first imaginary straight line segment connecting a first end of said reflecting surface units and a light center of said light source forms a first fixed angle with a reference plane normal to an axis of said reflector and containing said light center and a second imaginary straight line segment connecting a second end of said reflecting surface units and light center of said light source forms a second fixed angle with said reference plane; and said first region further comprises a plurality of hammer tone finished reflecting surfaces.
Claim 2
Dependent Claim
240 words
A luminaire comprising: a light source; a reflector surrounding said light source and reflecting light emitted by said light source to a desired direction; said reflector including a first region formed on an inner surface of said reflector located at a first position adjacent a light projecting end portion; a second region formed on said inner surface of said reflector located between said first region and a second position adjacent a base end portion of said reflector and having a smooth reflecting surface; a plurality of substantially identical reflecting surface units positioned in said second region, each having slanted opposite side portions which intersect each other, wherein said plurality of reflecting surface units are arranged in a circumferential direction at fixed intervals such that a plurality of smooth reflecting surface portions are defined between each two adjacent reflecting surface units and each connect said first and second positions and wherein a first imaginary straight line segment connecting a first end of said reflecting surface units and a light center of said light source forms a first fixed angle with a reference plane normal to an axis of said reflector and containing said light center and a second imaginary straight line segment connecting a second end of said reflecting surface units and light center of said light source forms a second fixed angle with said reference plane; and said first region further comprises a plurality of hammer tone finished reflecting surfaces.
Claim 3
Dependent Claim
56 words
A luminaire according to claim 1, wherein said first fixed angle of said first imaginary straight line segment further comprises a fixed angle within a range between about 0° and 15°, and said second fixed angle of said second imaginary straight line segment comprises a fixed angle within a range between about 20° and about 30°.
Claim 4
Dependent Claim
42 words
A luminaire according to claim 1, wherein said reflector further comprises a multi-layer structure comprising a base member of super pure aluminum and a protective film formed by electrolytic polishing said base member and thereafter coating said base member by anodic oxidation.
Claim 5
Dependent Claim
38 words
A luminaire according to claim 1, wherein said reflector further comprises a multi-layer structure having a base member, a high reflecting film coating on said base member, and a transparent protective film formed on said high reflectivity film.
Claim 6
Dependent Claim
35 words
A luminaire according to claim 4, wherein said base member further comprises a metal member, said high reflecting film is formed by evaporation of aluminum, and said transparent protective film further comprises an inorganic material.
Claim 7
Dependent Claim
14 words
A luminaire according to claim 5, wherein said inorganic material further comprises quartz glass.
Claim 8
Dependent Claim
42 words
A luminare according to claim 2, wherein said reflector further comprises a multi-layer structure including a base member of super pure aluminum and a protective film formed by electrolytic polishing said base member and thereafter coating said base member by anodic oxidation.
Claim 9
Dependent Claim
38 words
A luminaire according to claim 2, wherein said reflector further comprises a multi-layer structure having a base member, a high reflecting film coated on said base member, and a transparent protective film formed on said high reflectivity film.
Claim 10
Dependent Claim
35 words
A luminaire according to claim 8, wherein said base member further comprises a metal member, said high reflecting film is formed by evaporation of aluminum, and said transparent protective film further comprises an inorganic material.
Claim 11
Dependent Claim
13 words
A luminaire according to claim 9, wherein said inorganic material is quartz glass.
Claim 12
Dependent Claim
78 words
A luminaire according to claim 2, wherein said reflector has a shape gradually opening from said base end thereof toward said light projecting end, said plurality of reflecting surface units are arranged to form an annular shape in a plane perpendicular to said optical axis of said reflector, and ridgelines formed between said inclined opposite side portions of said plurality of reflecting surface units are arranged radially as viewed from the front of said opening of said reflector.
Claim 13
Dependent Claim
16 words
A luminaire according to claim 11, wherein said reflector further comprises a quadratic surface of revolution.
Claim 14
Dependent Claim
16 words
A luminaire according to claim 11, wherein said reflector further comprises a quadrangular pyramid shaped reflector.
Claim 15
Dependent Claim
66 words
A luminaire according to claim 11, wherein each of said plurality of reflecting surface units has a first sub-inclined surface which is inclined from said first end to said ridgelines formed between said inclined opposite side portions toward said opening of said reflector, and a second sub-inclined surface located which is inclined from said second end to said ridgeline toward said base end of said reflector.
Claim 16
Dependent Claim
38 words
A luminaire according to claim 2, wherein said first imaginary straight line segment crosses said reference plane at an angle of 10° and said second imaginary straight line segment crosses said reference plane at an angle of 30°.
Claim 17
Dependent Claim
37 words
A luminaire according to claim 2, wherein each one of said inclined opposite side portions cross said smooth portion of said second region of said inner surface of said reflector at an angle of about 10°-about 15°.
Claim 18
Dependent Claim
34 words
A luminaire according to claim 16, wherein each one of said inclined opposite side portions cross said smooth portion of said region of said inner surface of said reflector at an angle of 10°.
Claim 19
Dependent Claim
55 words
A luminaire according to claim 1, wherein said reflector is of a shape gradually opening from said base end thereof to said light projecting end, and said hammer tone finished reflecting portion is arranged to form an annular shape in a plane perpendicular to said optical axis of said reflector and along said optical axis.
Claim 20
Dependent Claim
89 words
A luminaire according to claim 18 wherein said first imaginary straight line segment connecting said first end of said reflecting surface unit and the light center of said light source crosses, at an angle of about 0° to about 15°, a reference plane including said light center and perpendicular to said optical axis of said reflector, and a second imaginary straight line segment connecting said second end of said reflecting surface unit and said light center crosses said reference plane at an angle of about 20° to about 30°.
Claim 21
Dependent Claim
61 words
A luminaire according to claim 19, wherein said plurality of reflecting surface units are arranged to form an annular shape in a plane perpendicular to said optical axis of said reflector and ridgelines formed between said inclined surfaces at both sides of said plurality of reflecting surfaces are arranged radially as viewed from the front of said opening of said reflector.
Claim 22
Dependent Claim
16 words
A luminaire according to claim 20, wherein said reflector further comprises a quadratic surface of revolution.
Claim 23
Dependent Claim
16 words
A luminaire according to claim 20, wherein said reflector further comprises a quadrangular pyramid shaped reflector.
Claim 24
Dependent Claim
61 words
A luminaire according to claim 20, wherein each one of said plurality of reflecting surface units further comprises a first subinclined surface which is inclined from said first end to said ridgeline toward said opening of said reflector, and a second subinclined surface which is inclined from said light projecting end to said ridgeline toward said base end of said reflector.
Claim 25
Dependent Claim
37 words
A luminaire according to claim 19, wherein said first imaginary straight segment crosses said reference plane at an angle of 10° and said second imaginary straight line segment crosses said reference plane at an angle of 30°.
Claim 26
Dependent Claim
42 words
A luminaire according to claim 19, wherein each one of said inclined opposite side portions cross said smooth portion of said second region of said inner surface of said reflector at an angle in a range of about 5° to about 20°.
Claim 27
Dependent Claim
35 words
A luminaire according to claim 25, wherein each one of said inclined opposite side portions cross said smooth portion of said region of said inner surface of said reflector at an angle of about 10°.
Claim 28
Dependent Claim
47 words
A luminaire according to any one of claims 11 to 26, wherein said reflector further comprises a multi-layer structure having a base member of super pure aluminum and a protective film formed by electrolytic polishing said base member and thereafter coating said base member by anodic oxidation.
Claim 29
Dependent Claim
43 words
A luminaire according to any one of claims 11 to 26, wherein said reflector is of a multi-layer structure comprising a base member, a high reflecting film coated on said base member, and a transparent protective film formed on said high reflectivity film.
Claim 30
Dependent Claim
35 words
A luminaire according to claim 28, wherein said base member further comprises a metal member, said high reflecting film is formed by evaporation of aluminum, and said transparent protective film further comprises an inorganic material.
Claim 31
Dependent Claim
14 words
A luminaire according to claim 29, wherein said inorganic material further comprises quartz glass.
References Cited (Backward Citations)
US3040994A
Cited
US3401258A
Cited
US3499780A
Cited
US3662165A
Cited
US3950638A
Cited
US4081667A
Cited
US4225908A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-12 | 1987-03-14 | 1987-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-12 | 1991-03-14 | 1991-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-12 | 1995-03-14 | 1995-09-13 | $7700.00 | Window Closed / Lapsed |