Patent US4623959A successfully refreshed from Google Patents.
US4623959A
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Apparatus, particularly for transloading vehicles for providing a field of view for carrying out work during darkness, particularly at military field transloading posts
Assignee: WISKA Hoppmann GmbH
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Filing: 1985-12-10
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Granted: 1986-11-18
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Expires: 2005-12-10
Abstract
Abstract For carrying out work during darkness by means of transloading vehicles on military field transloading posts, the apparatus for apron illumination while not making the post visible to undesired observers, comprises an apparatus casing with a light source arranged in its interior having an upstream-connected condenser lens and with a front lens, to which are connected two plane mirrors deflecting the optical path twice by 90° with interposed inwardly and outwardly pivotable diaphragms and/or filters, an exit optics being arranged in the light beam passing out of the lower plane mirror.
Inventors
- 👤 Georg C. Ostermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:19
CPC Classifications
F; F21; F21V; F21V21/00; F21V21/14; F21V21/30; F21W; F21W2131/00; F21W2131/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
215 words
An apparatus, particularly for transloading vehicles, such as fork lift trucks and the like, for providing a field of view for carrying out work at night, particularly at military field transloading posts, wherein, the apparatus comprises an apparatus casing with a front plate, in whose interior in the upper region of the rear surface of the front plate is provided a lamp housing with a light source, a condenser lens connected upstream thereof and detecting the complete irradiated light flux and a front lens located in the optical path of the light source and to which is connected two plane mirrors which deflect the optical path twice by 90° and which are spaced from and superimposed with respect to on another, whereby between the two plane mirrors in the optical path are arranged diaphragms and/or filters which can be pivoted into and out of the same by means of electromotive or electromagnet drive means or the like and below the lamp housing is provided a further case receiving exit optics for imaging the lamp coil filament in the entrance pupil of the exit optics through the front lens and wherein in the optical path of the exit optics in the front plate is provided a light exit port covered by means of a glass disk.
Claim 2
Independent Claim
215 words
An apparatus, particularly for transloading vehicles, such as fork lift trucks and the like, for providing a field of view for carrying out work at night, particularly at military field transloading posts, wherein, the apparatus comprises an apparatus casing with a front plate, in whose interior in the upper region of the rear surface of the front plate is provided a lamp housing with a light source, a condenser lens connected upstream thereof and detecting the complete irradiated light flux and a front lens located in the optical path of the light source and to which is connected two plane mirrors which deflect the optical path twice by 90° and which are spaced from and superimposed with respect to on another, whereby between the two plane mirrors in the optical path are arranged diaphragms and/or filters which can be pivoted into and out of the same by means of electromotive or electromagnet drive means or the like and below the lamp housing is provided a further case receiving exit optics for imaging the lamp coil filament in the entrance pupil of the exit optics through the front lens and wherein in the optical path of the exit optics in the front plate is provided a light exit port covered by means of a glass disk.
Claim 3
Dependent Claim
28 words
An apparatus according to claim 1, wherein a grey filter which can be pivoted in and out is arranged in the optical path between the two plane mirrors.
Claim 4
Dependent Claim
81 words
An apparatus according to claim 1, wherein the grey filter can be pivoted in and out by means of an electromotive or electromagnetic drive means and by means of a device, such as a time switch or the like, it is possible to fix the time during which the grey filter is in the pivoted out position and at the end of this time the grey filter is pivoted back into the optical path by means of the controlled drive means.
Claim 5
Dependent Claim
46 words
An apparatus according to claim 1, wherein on the outside of the casing front plate in the vicinity of the light exit port is provided a device with a pivotable outer plane mirror which deflects downwards that part of the illumination energy leaving the exit optics.
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) | 1989-11-17 | 1990-05-19 | 1990-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-17 | 1994-05-19 | 1994-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-17 | 1998-05-19 | 1998-11-18 | $7700.00 | Window Closed / Lapsed |