USH1154H
Expired / Lapsed
US
⏱️ 0.0 years remaining
Covert lighting adapter
Assignee: United States Department of the Army
•
Filing: 1992-04-20
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Granted: 1993-03-02
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Expires: 2012-04-20
Abstract
Abstract A Blue-Green spectral Filter and two polaroid filters are assembled within rotating barrel assembly to both limit light source emissions to a selected light spectrum and control light intensity in order to prevent enemy night vision device detection. The rotating barrel assembly can be manufactured to attach to any type of light source. In addition, environmental protection from rain and dust is maintained through O-ring seals.
Inventors
- 👤 David J. Gibson
- 👤 Paul F. Rohrbacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:32
CPC Classifications
F; F21; F21V; F21V9/00; F21V9/14; F21L; F21L4/00; F21L4/005
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
89 words
A lighting adaptor attached to a light source comprising: a spectral filter capable of filtering light to a designated frequency spectrum; a polaroid filter means for adjusting the intensity of light filtered by said spectral filter; said polaroid filter means comprising a rotating barrel assembly and at least one static polaroid filter and at least one movable polaroid filter, both polaroid filters having a cross-polarization and parallel-alignment state; an attachment means for securing the barrel assembly onto the light source; and an assembly sealing means for maintaining environmental protection.
Claim 2
Dependent Claim
89 words
A lighting adaptor attached to a light source comprising: a spectral filter capable of filtering light to a designated frequency spectrum; a polaroid filter means for adjusting the intensity of light filtered by said spectral filter; said polaroid filter means comprising a rotating barrel assembly and at least one static polaroid filter and at least one movable polaroid filter, both polaroid filters having a cross-polarization and parallel-alignment state; an attachment means for securing the barrel assembly onto the light source; and an assembly sealing means for maintaining environmental protection.
Claim 3
Dependent Claim
11 words
The lighting adaptor of claim 1 wherein said spectral is blue-green.
Claim 4
Dependent Claim
24 words
The lighting adaptor of claim 1 wherein said rotating barrel controls output intensity by rotating the polaroid filters between their cross-polarization and parallel-alignment states.
Claim 5
Dependent Claim
17 words
The lighting adaptor of claim 1 wherein said rotating barrel assembly is screwed onto the light source.
Claim 6
Dependent Claim
17 words
The lighting adaptor of claim 1 wherein said rotating barrel assembly is clamped onto the light source.
Claim 7
Dependent Claim
21 words
The lighting adaptor of claim 1 wherein said rotating barrel assembly has an inside surface which is of a dark color.
Claim 8
Dependent Claim
26 words
The lighting adaptor of claim 1 wherein said sealing means comprises O-rings placed at the point of attachment between said light source and the barrel assembly.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-03-01 | 1996-08-31 | 1997-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-03-01 | 2000-08-31 | 2001-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-03-01 | 2004-08-31 | 2005-03-02 | $7700.00 | Window Closed / Lapsed |