Patent US4327984A successfully refreshed from Google Patents.
US4327984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light filter assembly for photographic camera
Assignee: Individual
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Filing: 1981-07-27
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Granted: 1982-05-04
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Expires: 2001-07-27
Abstract
Abstract A light filter assembly is disclosed for a photographic camera which filter is composed of at least two light transmitting elements in combination with the lens of the camera. The elements are mounted in an assembly which in turn is capable of being mounted onto the end of the lens structure so that light entering the camera must be transmitted through both elements in turn. The element remote from the lens is made of a light transparent material while the element adjacent the lens is a polarizing filter. The assembly includes means whereby the transparent element can be stressed so that a "rainbow of colors" pattern can be superimposed on the image formed on the film. As an alternative embodiment, another polarizing filter is mounted in front of the transparent element.
Inventors
- 👤 Karl K. Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:36
CPC Classifications
G; G03; G03B; G03B11/00; G03B17/00; G03B17/02; G03B17/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
52 words
In combination: a camera having a lens structure; a light filter assembly mounted onto said lens structure; said light filter assembly comprising; a first polarizing panel disposed in front of said lens structure; a transparent disc, mounted parallel to said first polarizing panel; first means for straining and deforming said transparent disc.
Claim 2
Dependent Claim
52 words
In combination: a camera having a lens structure; a light filter assembly mounted onto said lens structure; said light filter assembly comprising; a first polarizing panel disposed in front of said lens structure; a transparent disc, mounted parallel to said first polarizing panel; first means for straining and deforming said transparent disc.
Claim 3
Dependent Claim
30 words
The combination of claim 1, wherein: said first means is limited to deforming said disc radially and; said first polarizing panel is disposed between said disc and said lens structure.
Claim 4
Dependent Claim
23 words
In the combinatin of claim 2 wherein: second means are provided to rotate said first polarizing panel with respect to said lens structure.
Claim 5
Dependent Claim
24 words
The combination of claim 2 wherein: a second polarizing panel disposed on the opposite side of said transparent disc than said first polarizing panel.
Claim 6
Dependent Claim
36 words
The combination of claim 4 wherein: said first polarizing panel is disposed between said disc and said lens structure; third means are provided to rotate said second polarizing panel with respect to said first polarizing panel.
Claim 7
Dependent Claim
23 words
The combination of claim 5 wherein: said second means are provided to rotate said first polarizing panel with respect to said lens structure.
Claim 8
Dependent Claim
51 words
The combination of claim 6 wherein: a stress ring is disposed about said disc; at least one threaded hole is provided in said stress ring and is disposed radially therein; a screw threaded into said threaded hole so that the inner end is capable of contacting the periphery of said disc.
Claim 9
Dependent Claim
29 words
The combination of claim 7 wherein: a sleeve is provided so that said first polarizing panel is mounted therein; said sleeve and said stress ring are fixedly mounted together.
Claim 10
Dependent Claim
51 words
In the combination of claim 1 wherein said first means comprises: a stress ring disposed about said disc; at least one threaded hole in said stress ring disposed radially therein; a screw threaded into said threaded hole so that the inner end is capable of contacting the periphery of said disc.
Claim 11
Dependent Claim
29 words
The combination of claim 9 wherein: a sleeve is provided so that said first polarizing panel is mounted therein; said sleeve and said stress ring are fixedly mounted together.
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) | 1985-05-03 | 1985-11-02 | 1986-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-03 | 1989-11-02 | 1990-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-03 | 1993-11-02 | 1994-05-04 | $7700.00 | Window Closed / Lapsed |