US3848119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting projector
Assignee: PIERRE ANGENIE Ets
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Filing: 1973-07-16
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Granted: 1974-11-12
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Expires: 1993-07-16
Abstract
Abstract A lighting projector, particularly for surgical operating theatres or rooms, including a plurality of radially extending basic elements of substantially cylindrical configuration, centered on a common casing, each element comprising a light source illuminating a frosted zone, a wide-aperture optical condenser for concentrating the light power into a beam of relatively narrow cross-sectional area, a concave mirror located opposite said condenser and reflecting the radiated light, and an optical element forming an image of said frosted zone in the plane of use and determining a field of illumination after reflecting same by means of a mirror, the beams reflected by all the mirrors of said elements being received at a common area to be illuminated so as to minimize the cross-sectional obstruction area of the projector.
Inventors
- 👤 A Masson
- 👤 J Joubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:51
CPC Classifications
F; F21; F21V; F21V5/00; F21V5/007; F21W; F21W2131/00; F21W2131/20; F21W2131/205
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
127 words
A lighting projector, particularly for operating room use, comprising a star-shaped arrangement including a plurality of basic elements, disposed circumferentially at intervals from a common center, said basic elements each comprising a light source for producing a light beam, a frosted zone in close proximity to said light source and illuminated by said light source, a wideapertured optical condensing system in the path of said light beam for concentrating said beam onto an intense beam of relatively narrow cross-section, and a concave mirror located opposite said condensing system and reflecting at least a portion of said light beam, and a reflecting mirror and an optical element in the path of said intense beam and forming the image of said frosted zone on a plane field of illumination.
Claim 2
Dependent Claim
127 words
A lighting projector, particularly for operating room use, comprising a star-shaped arrangement including a plurality of basic elements, disposed circumferentially at intervals from a common center, said basic elements each comprising a light source for producing a light beam, a frosted zone in close proximity to said light source and illuminated by said light source, a wideapertured optical condensing system in the path of said light beam for concentrating said beam onto an intense beam of relatively narrow cross-section, and a concave mirror located opposite said condensing system and reflecting at least a portion of said light beam, and a reflecting mirror and an optical element in the path of said intense beam and forming the image of said frosted zone on a plane field of illumination.
Claim 3
Dependent Claim
92 words
A lighting projector as defined in claim 1, wherein said basic elements have an outer peripheral end, and wherein said reflecting mirror is disposed at said outer peripheral end of each of said basic elements, and is inclined from the plane of said basic elements so that said light beams reflected by said reflecting mirror converge on said plane field of illumination, and wherein the axes of said reflected beams are coincident with the generatrices of a common cone having its apex coincident with the center of said plane field of illumination.
Claim 4
Dependent Claim
21 words
A lighting projector as defined in claim 1, wherein said light source of said basic elements comprise a common central casing.
Claim 5
Dependent Claim
55 words
A lighting projector as defined in claim 1, wherein said basic elements have an outer peripheral end, and wherein said reflecting mirror is disposed at said outer peripheral end at each of said basic elements, said mirror comprising a system of thin interferential layers, for selectively reflecting said light beams radiated from said light source.
Claim 6
Dependent Claim
42 words
A lighting projector as defined in claim 4, wherein said light sources of said basic elements comprise a common central casing, and each basic element comprises a tubular case extending in radial direction at spaced angular intervals around said common central casing.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |