US4235541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Periscope finder
Assignee: Individual
•
Filing: 1979-03-29
•
Granted: 1980-11-25
•
Expires: 1999-03-29
Abstract
Abstract A periscope finder readily attached to a camera in place of the camera lens which includes a pair of telescopic tubular members having light reflecting mirrors at their free ends and being detachably joined to the camera lens at their inner ends.
Inventors
- 👤 Billwayne Jamel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:55
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/48; G02; G02B; G02B23/00; G02B23/02; G02B23/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
146 words
A periscope finder for use with a film containing camera of the interchangeable lens mount type to facilitate taking of pictures in a crowd, said periscope finder being of the knockdown type to facilitate carrying of same in a compact condition and comprising a pair of tubular extensions and a pair of light deflecting members each having means thereon to enable the extensions to be removably secured to the camera lens with the said lens therebetween to form an elongated light transmitting tube of considerable length with the light deflecting members secured to the free ends of the said light transmitting tube to form the assembled periscope finder and to enable the thus assembled periscope finder to be detachably secured to the camera lens mount, said camera lens being adapted to be employed to focus the light transmitted through the periscope finder to the camera film.
Claim 2
Dependent Claim
146 words
A periscope finder for use with a film containing camera of the interchangeable lens mount type to facilitate taking of pictures in a crowd, said periscope finder being of the knockdown type to facilitate carrying of same in a compact condition and comprising a pair of tubular extensions and a pair of light deflecting members each having means thereon to enable the extensions to be removably secured to the camera lens with the said lens therebetween to form an elongated light transmitting tube of considerable length with the light deflecting members secured to the free ends of the said light transmitting tube to form the assembled periscope finder and to enable the thus assembled periscope finder to be detachably secured to the camera lens mount, said camera lens being adapted to be employed to focus the light transmitted through the periscope finder to the camera film.
Claim 3
Dependent Claim
33 words
A periscope finder according to claim 1 wherein at least one of said tubular extensions is formed of at least two telescoping elements to enable the length of the extension to be changed.
References Cited (Backward Citations)
US1095285A
Cited
US1486231A
Cited
US2933992A
Cited
US2845842A
Cited
GB1286355A
Cited
US4137539A
Cited
US4114171A
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FR2384272A1
Cited
US4133607A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-25 | 1984-05-26 | 1984-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-25 | 1988-05-26 | 1988-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-25 | 1992-05-26 | 1992-11-25 | $7700.00 | Window Closed / Lapsed |