US3555264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Searchlight apparatus
Assignee: Licentia Patent Verwaltungs GmbH
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Filing: 1968-04-03
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Granted: 1971-01-12
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Expires: 1988-04-03
Abstract
Abstract Searchlight apparatus for selectively emitting a strong beam of white or infrared light for target finding purposes or a weak beam of light for nighttime assistance in a ''''passive-viewing'''' system. The searchlight includes a light source, a searchlight housing with a light-exit opening, an infrared filter arranged in the housing to be selectively swung into the path of the searchlight beam and a protective cover arranged to selectively close the light-exit opening. Another opening, substantially smaller than the light-exit opening, is provided in the protective cover with a red filter arranged therein. A shutter, arranged between the light source and the smaller opening, is also provided to selectively prevent light from passing through the red filter. An actuating device is included to automatically close the shutter when the light source is turned off.
Inventors
- 👤 Peter Schimmelpfennig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:28
CPC Classifications
F; F21; F21S; F21S8/00; F21S8/003
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
180 words
A searchlight comprising, in combination: a. a searchlight lamp for the emission of light; b. a searchlight housing enclosing said lamp having a first light aperture; c. pivotally mounted housing closure means for selectively closing said first light aperture, said closure means having a second light aperture substantially smaller than said first light aperture; d. red filter means arranged in said second light aperture; e. light shutter means arranged between said lamp and said second light aperture for selectively closing said second light aperture while said closure means are in a position wherein said first light aperture is closed; and f. means for selectively closing said shutter means, whereby said searchlight emits a strong searchlight beam when said first light aperture is not closed by said closure means, a weak searchlight beam when said first light aperture is closed by said closure means but said second light aperture is not closed by said shutter means, and no light when said first light aperture is closed by said closure means and said second light aperture is closed by said shutter means.
Claim 2
Dependent Claim
180 words
A searchlight comprising, in combination: a. a searchlight lamp for the emission of light; b. a searchlight housing enclosing said lamp having a first light aperture; c. pivotally mounted housing closure means for selectively closing said first light aperture, said closure means having a second light aperture substantially smaller than said first light aperture; d. red filter means arranged in said second light aperture; e. light shutter means arranged between said lamp and said second light aperture for selectively closing said second light aperture while said closure means are in a position wherein said first light aperture is closed; and f. means for selectively closing said shutter means, whereby said searchlight emits a strong searchlight beam when said first light aperture is not closed by said closure means, a weak searchlight beam when said first light aperture is closed by said closure means but said second light aperture is not closed by said shutter means, and no light when said first light aperture is closed by said closure means and said second light aperture is closed by said shutter means.
Claim 3
Dependent Claim
40 words
A searchlight as defined in claim 1 wherein said first light aperture contains an infrared filter and wherein means are provided for selectively placing said first light aperture in the path of the beam of light from said searchlight lamp.
Claim 4
Dependent Claim
119 words
In a searchlight having a light source, a searchlight housing with a light-exit opening, an infrared filter arranged in the housing to be selectively swung into the path of the searchlight beam and a protective cover arranged in front of said light-exit opening to selectively close said exit opening, the improvement comprising red filter means arranged in an opening in said protective cover, said red filter means having a surface area considerably less than the area of said opening in said housing, shutter means arranged between said light source and said red filter means for selectively preventing light from passing through said red filter, and means for automatically closing said shutter means when said light source is turned off.
Claim 5
Dependent Claim
119 words
In a searchlight having a light source, a searchlight housing with a light-exit opening, an infrared filter arranged in the housing to be selectively swung into the path of the searchlight beam and a protective cover arranged in front of said light-exit opening to selectively close said exit opening, the improvement comprising red filter means arranged in an opening in said protective cover, said red filter means having a surface area considerably less than the area of said opening in said housing, shutter means arranged between said light source and said red filter means for selectively preventing light from passing through said red filter, and means for automatically closing said shutter means when said light source is turned off.
Claim 6
Dependent Claim
16 words
The improvement defined in claim 3, wherein said protective cover is swivally connected to said housing.
Claim 7
Dependent Claim
15 words
The improvement defined in claim 3, wherein said opening in said protective cover is disc-shaped.
Claim 8
Dependent Claim
15 words
The improvement defined in claim 3, wherein said opening in said protective cover is slit-shaped.
Claim 9
Dependent Claim
47 words
The improvement defined in claim 3, wherein said protective cover includes two flaps, each of which is swivally connected to said housing, and wherein said opening in said protective cover is formed as a slit between said two flaps when said flaps are in the closed position.
Claim 10
Dependent Claim
22 words
The improvement defined in claim 3, wherein said shutter means includes an opaque slide plate arranged to slide on said protective cover.
Claim 11
Dependent Claim
101 words
The improvement defined in claim 3, wherein said shutter means includes flap means attached to said infrared filter for selectively preventing the transmission of light from said light source to said red filter, and wherein said flap means is arranged to be swung into said light transmission preventing position when said infrared filter is swung into the path of the searchlight beam when said light source is turned off and to be swung out of said light transmission preventing position when said infrared filter is swung out of the searchlight beam and when said searchlight is operated to emit infrared light.
Claim 12
Dependent Claim
55 words
The improvement defined in claim 3, wherein said shutter means includes means rigidly attached to said infrared filter for selectively preventing the transmission of light from said light source to said red filter, said light transmission preventing means arranged to be swung into and out of said light transmission preventing position by said infrared filter.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |