Patent US4922801A successfully refreshed from Google Patents.
US4922801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire control system with aiming error compensation
Assignee: Sagem SA
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Filing: 1989-08-01
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Granted: 1990-05-08
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Expires: 2009-08-01
Abstract
Abstract A fire control system for a weapon having an operator-aimed barrel compri a sighting piece carried by the barrel and having a reticle adjustable in position with respect to the bore axis of the barrel. A camera fast with the barrel has a field coaxial with the bore axis. The apparent movement of the target in the field of the camera is measured as well as the angular movements of the barrel by the operator. The position to be given to the reticle is computed from variations of the aiming direction of the barrel and from the apparent movement and the position of the reticle is consequently adjusted. The reticle may consist of a LCD.
Inventors
- 👤 Paul Jaquard
- 👤 Jean-Pierre Lelay
- 👤 Jean Doreau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:18
CPC Classifications
F; F41; F41G; F41G3/00; F41G3/06; F41G5/00; F41G5/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
142 words
A fire control system for a weapon having an operator-aimed barrel, comprising: a sighting piece carried by the barrel and having a reticle adjustable in position with respect to the bore axis of the barrel, a camera fast with said barrel and having a field coaxial with said bore axis, means for measuring the apparent movement of an image of a target in the field of the camera, means for measuring angular movements of said barrel as controlled by said operator, means for computing a position to be given to said reticle from variations of the aiming direction of the barrel provided by said angular movement measuring means and from said apparent movement, and means for controlling the position of the reticle with respect to the direction of the bore axis responsive to an indication of position provided by said computing means.
Claim 2
Dependent Claim
142 words
A fire control system for a weapon having an operator-aimed barrel, comprising: a sighting piece carried by the barrel and having a reticle adjustable in position with respect to the bore axis of the barrel, a camera fast with said barrel and having a field coaxial with said bore axis, means for measuring the apparent movement of an image of a target in the field of the camera, means for measuring angular movements of said barrel as controlled by said operator, means for computing a position to be given to said reticle from variations of the aiming direction of the barrel provided by said angular movement measuring means and from said apparent movement, and means for controlling the position of the reticle with respect to the direction of the bore axis responsive to an indication of position provided by said computing means.
Claim 3
Dependent Claim
24 words
A fire control system according to claim 1, wherein said means for measuring the angular movements of the barrel comprise tachymetric or gyrometric sensors.
Claim 4
Dependent Claim
57 words
A fire control system according to claim 1, comprising a supplemental large field camera, means for measuring a size of said image of the target and additional computing means for computing, from the apparent size of the target, from the focal length of the camera and from stored dimensions of the target, the distance of the target.
Claim 5
Dependent Claim
74 words
A fire control system according to claim 1, further comprising means for measuring an apparent size of the target in the field of the camera, means for storing an actual size of typical targets, means for selecting one of said actual sizes, and range finding means for computing the distance of the target imaged by the camera from the apparent size of the target, the focal length of the camera and said actual dimensions.
Claim 6
Dependent Claim
32 words
A fire control system according to claim 1, wherein said reticle consists of a liquid crystal matrix display having means for energizing at least one line and one column of the matrix.
Claim 7
Dependent Claim
28 words
A fire control system according to claim 1, wherein said reticle consists of a liquid crystal display having means for energizing at least one pixel of said matrix.
Claim 8
Dependent Claim
40 words
A fire control system according to claim 5, wherein said camera has a light intensifier tube and said system further comprises means for displaying the image of the field of the camera by selected energization of pixels of the matrix.
References Cited (Backward Citations)
US4020324A
Cited
US4038521A
Cited
US4606256A
Cited
US4312262A
Cited
US4318361A
Cited
GB2077400A
Cited
US4570530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |