Patent US3945133A successfully refreshed from Google Patents.
US3945133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weapons training simulator utilizing polarized light
Assignee: United States Department of the Navy
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Filing: 1975-06-20
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Granted: 1976-03-23
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Expires: 1995-06-20
Abstract
Abstract A weapons training simulator in which a multilayer composite movie film fed of a normal film for projecting a non-polarized image of target and background and a polarized film for projecting a polarized target image is utilized in a projector to project the polarized and non-polarized images on a non-depolarizing screen and in which a weapons mounted polarized light sensor circuit is provided to indicate target hit or miss as the weapon is aimed and fired. The invention also contemplates intentional non-registration of the normal and polarized films by a number of frames selected to represent the correct target lead to properly hit the moving target.
Inventors
- 👤 Windell N. Mohon
- 👤 George Derderian
- 👤 Denis R. Breglia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:29
CPC Classifications
F; F41; F41G; F41G3/00; F41G3/26; F41G3/2605; F41G3/2611; F41G3/2616; F41G3/2622; F41G3/2627
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
157 words
A polarizing type gunnery training simulator comprising a. a projector; b. a composite specially polarized movie film for said projector comprising layers respectively of normal non-polarized film taken of a scene including background and target areas and a polarizing type film taken of the target area only of the scene; c. said normal film having recorded said entire scene during the daytime, and said polarizing type film having recorded said targets at night with only said targets illuminated to provide a film of linearly polarized target areas upon exposure; d. a non-polarizing screen upon which to display, via said projector, the unpolarized entire scene and the linearly polarized target area of said scene; and e. a polarized light sensor unit and means for attaching said unit to a weapon to provide hit indication when said weapon is aimed at said polarized target area, and no hit indication when said weapon is aimed at said non-polarized background scene.
Claim 2
Dependent Claim
157 words
A polarizing type gunnery training simulator comprising a. a projector; b. a composite specially polarized movie film for said projector comprising layers respectively of normal non-polarized film taken of a scene including background and target areas and a polarizing type film taken of the target area only of the scene; c. said normal film having recorded said entire scene during the daytime, and said polarizing type film having recorded said targets at night with only said targets illuminated to provide a film of linearly polarized target areas upon exposure; d. a non-polarizing screen upon which to display, via said projector, the unpolarized entire scene and the linearly polarized target area of said scene; and e. a polarized light sensor unit and means for attaching said unit to a weapon to provide hit indication when said weapon is aimed at said polarized target area, and no hit indication when said weapon is aimed at said non-polarized background scene.
Claim 3
Dependent Claim
27 words
Apparatus according to claim 1 said films being assembled in a desired degree of non-registration to provide a polarized target lead corresponding to selected problem vehicle speed.
Claim 4
Dependent Claim
87 words
Apparatus according to claim 1 wherein said sensor unit comprises a. a light wave detector; b. a rotatable polarization type filter positioned between said screen and light detector; c. means for rotating said filter to pass to said detector variable light value for polarized light and continuous light value for non-polarized light to produce respectively alternating and direct current outputs from said detector; and d. an amplifying and indicating electrical circuit for detection of alternating current indicative of target hit and direct current indicative of target miss.
Claim 5
Dependent Claim
86 words
Apparatus according to claim 2 wherein said sensor unit comprises a. a light wave detector; b. a rotatable polarization type filter positioned between said screen and light detector; c. means for rotating said filter to pass said detector variable light value for polarized light and continuous light value for non-polarized light to produce respectively alternating and direct current outputs from said detector; and d. an amplifying and indicating electrical circuit for detection of alternating current indicative of target hit and direct current indicative of target miss.
Claim 6
Dependent Claim
20 words
Apparatus according to claim 3 said electrical circuit including a direct current meter to distinguish between direct and alternating current.
Claim 7
Dependent Claim
55 words
Apparatus according to claim 2 said electrical circuit including an amplifier, a switching relay biased to open switch condition and actuable to closed switch position when alternating current is applied to said relay, and indicator means for connecting through said switch to a source of voltage potential to provide a signal indicative of target hit.
Claim 8
Dependent Claim
20 words
Apparatus according to claim 4 said electrical circuit including a direct current meter to distinguish between direct and alternating current.
Claim 9
Dependent Claim
55 words
Apparatus according to claim 4 said electrical circuit including an amplifier, a switching relay biased to open switch condition and actuable to closed switch position when alternating current is applied to said relay, and indicator means for connecting through said switch to a source of voltage potential to provide a signal indicative of target hit.
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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) | 1979-03-23 | 1979-09-22 | 1980-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-23 | 1983-09-22 | 1984-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-23 | 1987-09-22 | 1988-03-23 | $7700.00 | Window Closed / Lapsed |