Patent US3988844A successfully refreshed from Google Patents.
US3988844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting system for compatible stereo viewer
Assignee: Individual
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Filing: 1975-06-09
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Granted: 1976-11-02
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Expires: 1995-06-09
Abstract
Abstract An internal or self-contained lighting system for a viewer utilized in a viewing system which permits the stereoscopic viewing of a photograph, or the like, said photograph also being adapted for two dimensional viewing or display when not being viewed in three dimensions, said lighting system including light bulb means mounted within the viewer housing, reflector means arranged within said housing for cooperation with the bulb means for directing the light emanating therefrom onto the back-to-back images of the picture being viewed, and dispersing the light across the faces of the picture for efficiently illuminating the image during viewing thereof.
Inventors
- 👤 Marvin E. Lebow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:53
CPC Classifications
G; G02; G02B; G02B30/00; G02B30/20; G02B30/34; G02B30/35
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
131 words
A lighting system for illuminating a picture in a three dimensional viewer apparatus and comprising light box means provided in the interior of said viewer apparatus for directing light simultaneously to the opposite faces of said picture, illuminating means provided for said light box means for supplying said light substantially uniformally across said opposite faces of said picture, reflecting means provided for said light box means and cooperating with said illuminating means for directing the light simultaneously to the opposite faces of said picture, means precluding entry of ambient light from the exterior of the viewer into the area surrounding the picture, and masking means provided for said light box means for blocking the path of unwanted light from said illuminating means to preclude hampering of the lighting of the picture.
Claim 2
Dependent Claim
131 words
A lighting system for illuminating a picture in a three dimensional viewer apparatus and comprising light box means provided in the interior of said viewer apparatus for directing light simultaneously to the opposite faces of said picture, illuminating means provided for said light box means for supplying said light substantially uniformally across said opposite faces of said picture, reflecting means provided for said light box means and cooperating with said illuminating means for directing the light simultaneously to the opposite faces of said picture, means precluding entry of ambient light from the exterior of the viewer into the area surrounding the picture, and masking means provided for said light box means for blocking the path of unwanted light from said illuminating means to preclude hampering of the lighting of the picture.
Claim 3
Dependent Claim
27 words
A lighting system as set forth in claim 1 wherein said light box means comprises a pair of light boxes arranged symmetrically with respect to the picture.
Claim 4
Dependent Claim
42 words
A lighting system as set forth in claim 1 wherein the illuminating means comprises light bulb means arranged for cooperation with the reflecting means for directing a supply of light across substantially the entire surface of the opposite sides of said picture.
Claim 5
Dependent Claim
161 words
A lighting system for illuminating a picture in a three dimensional viewer apparatus and comprising first light box means disposed in the proximity of one side edge of the picture, second light box means substantially identical with said first light box means and disposed in the proximity of the opposite side edge of the picture, each of said light box means including at least one light bulb, reflector means surrounding a portion of said light bulb for directing the light simultaneously across substantially half the surface of each face of the picture whereby the entire surface of each face of said picture is substantially equally lighted, means precluding entry of ambient light from the exterior of the viewer into the area surrounding the picture, and mask means selectively arranged with respect to said light bulb and said reflecting means for interrupting reflected light and other unwanted light paths for reducing application of unwanted light on the picture during a viewing operation.
Claim 6
Dependent Claim
161 words
A lighting system for illuminating a picture in a three dimensional viewer apparatus and comprising first light box means disposed in the proximity of one side edge of the picture, second light box means substantially identical with said first light box means and disposed in the proximity of the opposite side edge of the picture, each of said light box means including at least one light bulb, reflector means surrounding a portion of said light bulb for directing the light simultaneously across substantially half the surface of each face of the picture whereby the entire surface of each face of said picture is substantially equally lighted, means precluding entry of ambient light from the exterior of the viewer into the area surrounding the picture, and mask means selectively arranged with respect to said light bulb and said reflecting means for interrupting reflected light and other unwanted light paths for reducing application of unwanted light on the picture during a viewing operation.
Claim 7
Dependent Claim
57 words
A lighting system as set forth in claim 4 wherein the reflecting means comprises arcuate wall means surrounding a portion of said light bulb for selectively directing the light onto the opposite sides of the picture, and auxiliary reflecting means oppositely disposed with respect to the arcuate reflecting means for cooperation therewith for diffusion of said light.
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) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |