Patent US4263639A successfully refreshed from Google Patents.
US4263639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light dispersion system with substituted diffusion panels
Assignee: Individual
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Filing: 1979-09-24
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Granted: 1981-04-21
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Expires: 1999-09-24
Abstract
Abstract An improved light dispersion system for fluorescent lighting fixtures includes a plurality of horizontal diffuser panels suspended below a light source. An upper set of diffuser panels are spaced apart to define a light passageway. A lower diffuser panel is positioned in registration with the light passageway for intercepting and reflecting incident light. Both the upper and lower diffuser panels further scatter transmitted light by refraction. A chromatic lens filter is selectively insertable within the light passageway for modifying the resultant color spectrum.
Inventors
- 👤 Louis L. Schacht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:19
CPC Classifications
F; F21; F21V; F21V17/00; F21V17/10; F21V17/12; E; E04; E04B; E04B9/00; E04B9/32; F21S; F21S8/00; F21S8/02; F21S8/026; F21V17/104; F21V9/00; F21V9/08; F21Y; F21Y2103/00; F21Y2113/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
125 words
In combination with a recessed ceiling mounted lighting fixture having a fluorescent light source including a light transmitting panel substantially coincident with the ceiling surface, the improvement comprising a light dispersion system having a plurality of substantially planar translucent diffuser panels for use in substitution of the said light transmitting panel, attachment means including a set of brackets adapted for interfitting securement to the recessed lighting fixture for suspending the diffuser panels in substantially horizontal planes below the light source and in vertical spaced relationship from the ceiling surface extending beyond the marginal periphery of the lighting fixture whereby the diffuser panels disperse incident light emitted from the light source by refraction and reflection toward the ceiling surface to increase the effective field of illumination.
Claim 2
Dependent Claim
125 words
In combination with a recessed ceiling mounted lighting fixture having a fluorescent light source including a light transmitting panel substantially coincident with the ceiling surface, the improvement comprising a light dispersion system having a plurality of substantially planar translucent diffuser panels for use in substitution of the said light transmitting panel, attachment means including a set of brackets adapted for interfitting securement to the recessed lighting fixture for suspending the diffuser panels in substantially horizontal planes below the light source and in vertical spaced relationship from the ceiling surface extending beyond the marginal periphery of the lighting fixture whereby the diffuser panels disperse incident light emitted from the light source by refraction and reflection toward the ceiling surface to increase the effective field of illumination.
Claim 3
Dependent Claim
56 words
An improved light dispersion system as claimed in claim 1 further including an upper set of coplanar diffuser panels, said diffuser panels being separated to define therebetween a light passageway, a lower diffuser panel slidably positionable below the upper set of diffuser panels for registration with the light passageway to intercept and disperse light passing therethrough.
Claim 4
Dependent Claim
50 words
An improved light dispersion system as claimed in claim 2 further including hanger means depending from each of said brackets, a pair of transverse stringer members, the opposite ends of said stringer members being seated within the respective hanger means whereby the diffuser panels are supportable upon the transverse stringers.
Claim 5
Dependent Claim
30 words
An improved light dispersion system as claimed in claim 3 further including a stirrup, said stirrup member being slidably engageable on the stringer member for positioning the lower diffuser panel.
Claim 6
Dependent Claim
31 words
An improved light dispersion system as claimed in claim 4 wherein the stirrup member includes a flexibly resilient collar, said collar being adapted for snap fit engagement over the stringer member.
Claim 7
Dependent Claim
25 words
An improved light dispersion system as claimed in claim 5 wherein the bracket is provided with a screw clamp for securement to the lighting fixture.
Claim 8
Dependent Claim
25 words
An improved light dispersion system as claimed in claim 5 wherein the bracket is provided with a retainer spring for securement to the lighting fixture.
Claim 9
Dependent Claim
48 words
An improved light dispersion system as claimed in claim 7 further including retainer means within the upper set of diffuser panels, a chromatic filter element, said filter element being adapted for selective engagement within the retainer means for occupying the light passageway to modify the resultant color spectrum.
Claim 10
Dependent Claim
22 words
An improved light dispersion system as claimed in claim 8 wherein the diffuser panels are substantially identical in size for interchangeable substitution.
Claim 11
Dependent Claim
24 words
An improved light dispersion system as claimed in claim 9 wherein the hanger means is provided with an integral shelf for receiving the hanger.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-04-20 | 1984-10-20 | 1985-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-20 | 1988-10-20 | 1989-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-20 | 1992-10-20 | 1993-04-21 | $7700.00 | Window Closed / Lapsed |