US3787688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low light level, underwater, viewing device
Assignee: United States Department of the Army
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Filing: 1972-06-12
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Granted: 1974-01-22
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Expires: 1992-06-12
Abstract
Abstract An underwater viewing system is described which provides enhanced viewing by means of an image intensification tube. The unit is binocular and permits wide angle direct viewing as well as the more narrow intensified field of view best suited for submerged operation at night or in a low light environment.
Inventors
- 👤 R Stone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:43
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/12; G; G02; G02B; G02B23/00; G02B23/16; G02B23/22
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
118 words
An individual swimmer''s underwater viewing device for use in low and high level light environments comprising: a flexible frame member having a contoured edge to engage the perimeters of said individual''s face in a watertight sealing relationship and a regular window edge to engage a face plate in a similar relationship; a face plate mounted within said regular edge, having a plurality of aperatures therein; an image intensifier assembly including an objective lens, a voltage converter, an image intensifier tube and a eyepiece mounted through a first of said apertures; a waterproof switch mounted through a second of said apertures; and a low voltage power supply electrically coupled through said switch to said voltage converter and intensifier tube.
Claim 2
Dependent Claim
118 words
An individual swimmer''s underwater viewing device for use in low and high level light environments comprising: a flexible frame member having a contoured edge to engage the perimeters of said individual''s face in a watertight sealing relationship and a regular window edge to engage a face plate in a similar relationship; a face plate mounted within said regular edge, having a plurality of aperatures therein; an image intensifier assembly including an objective lens, a voltage converter, an image intensifier tube and a eyepiece mounted through a first of said apertures; a waterproof switch mounted through a second of said apertures; and a low voltage power supply electrically coupled through said switch to said voltage converter and intensifier tube.
Claim 3
Dependent Claim
38 words
A viewing device according to claim 1 wherein a second image intensifier assembly is mounted through a third aperature in said face plate and electrically connected through said switch to said power supply to provide a binocular system.
Claim 4
Dependent Claim
25 words
A viewing device according to claim 1 wherein said power supply is a battery and holder mounted through a fourth aperture in said face plate.
Claim 5
Dependent Claim
18 words
A viewing device according to claim 1 wherein said face plate is made from a transparent solid material.
Claim 6
Dependent Claim
18 words
A viewing device according to claim 2 wherein said face plate is made from a transparent solid material.
Claim 7
Dependent Claim
18 words
A viewing device according to claim 3 wherein said face plate is made from a transparent solid material.
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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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |