Patent US3774992A successfully refreshed from Google Patents.
US3774992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical framing device for photographic cameras
Assignee: Individual
•
Filing: 1972-03-06
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Granted: 1973-11-27
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Expires: 1992-03-06
Abstract
Abstract A tubular telescoping member of concentric, translucent plastic rings is provided at one end with a mount adapted to grip the accessory ring of a camera lens assembly and with a centrally pierced diffusing lens at the other. Light passing through the central orifice of the diffusing lens is unaffected by the optical framing device and produces a clear, true image on the film. Light entering the objective lens after passing through the diffusing lens, in combination with the light entering through the translucent periphery of the tubular member, produces concentric rings of differing brightness and color on the film, surrounding the aforementioned image in the center of the negative.
Inventors
- 👤 I Steiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:20
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/02; G02B7/04; G03; G03B; G03B17/00; G03B17/02; G03B17/12; G03B17/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
125 words
An accessory device for photographic cameras, comprising means adapted to engage said device about the lens barrel or housing of the camera lens; a telescopically extensible barrel having a plurality of translucent colored ring elements; and diffusing means having a central, circular orifice adapted to be mounted at the end of said extensible barrel spaced from the camera lens, and aligned parallel to, and coaxial with, said lens, whereby the light diffused in transit through said lens, in combination with the light transmitted through said ring elements form a rainbow-like halo effect of substantially concentric circular bands of light of different coloring or shading blended about the central image formed in said camera and on a developed photograph produced from film used in said camera.
Claim 2
Dependent Claim
125 words
An accessory device for photographic cameras, comprising means adapted to engage said device about the lens barrel or housing of the camera lens; a telescopically extensible barrel having a plurality of translucent colored ring elements; and diffusing means having a central, circular orifice adapted to be mounted at the end of said extensible barrel spaced from the camera lens, and aligned parallel to, and coaxial with, said lens, whereby the light diffused in transit through said lens, in combination with the light transmitted through said ring elements form a rainbow-like halo effect of substantially concentric circular bands of light of different coloring or shading blended about the central image formed in said camera and on a developed photograph produced from film used in said camera.
Claim 3
Dependent Claim
32 words
The device defined in claim 1, wherein said right elements comprises a plurality of coaxial, tubular elements; at least one of said elements being of a color different then said other elements.
Claim 4
Dependent Claim
17 words
The device defined in claim 1, wherein said ring elements comprise a plurality of coaxial, conical elements.
Claim 5
Dependent Claim
32 words
The device defined in claim 3, wherein said ring elements form a divergent conical tube; the angle of divergence of said ring elements substantially equalling the angle of view of said lens.
Claim 6
Dependent Claim
24 words
The device defined in claim 1, wherein said central orifice of said diffusing ring passes more than half of light incident on said lens.
References Cited (Backward Citations)
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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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |