Patent US4606256A successfully refreshed from Google Patents.
US4606256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sight system for a stabilized gun
Assignee: BAE Systems Integrated System Technologies Ltd
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Filing: 1978-10-24
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Granted: 1986-08-19
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Expires: 1998-10-24
Abstract
Abstract A tank gun sighting system in which there is a visual sight having a boresight mark permanently aligned with the gun and in which an electronic aiming mark is superimposed on the visual target scene. The aiming mark is controllable by the gunner with effectively zero inertia and can be laid on the target very quickly. The gun control equipment is directed by a signal which is the difference between the aiming mark off-boresight signal and the gun movement signal derived from a rate gyro in the gun control loop. The aiming mark is thus stabilized on the target scene, and in particular on the target, as the gun slews round to reduce the boresight/aiming mark error. An aim-off signal is calculated and added in to the gun control to lay the gun at the required angle off the aiming mark.
Inventors
- 👤 Mervyn C. De'Ath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:01
CPC Classifications
F; F41; F41G; F41G3/00; F41G3/06; F41G3/22; F41G5/00; F41G5/14; F41G5/24
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
94 words
A sight system for a stabilised gun, the sight system including a boresight mark for permanent alignment with the gun boresight, means for injecting an electronically generated aiming mark into the sight, manually operable means for producing a demand signal designating required movement of the aiming mark with respect to the boresight, and means for subtracting from said demand signal a gun movement signal, the arrangement being such that the aiming mark is controlled with respect to the target scene in accordance with the demand signal and irrespective of the rate of gun movement.
Claim 2
Dependent Claim
94 words
A sight system for a stabilised gun, the sight system including a boresight mark for permanent alignment with the gun boresight, means for injecting an electronically generated aiming mark into the sight, manually operable means for producing a demand signal designating required movement of the aiming mark with respect to the boresight, and means for subtracting from said demand signal a gun movement signal, the arrangement being such that the aiming mark is controlled with respect to the target scene in accordance with the demand signal and irrespective of the rate of gun movement.
Claim 3
Dependent Claim
34 words
A sight system according to claim 1, for use in a moving-own-vehicle (MOV) situation, and including means for integrating a rate gyro signal of the gun stabilising system to constitute said gun movement signal.
Claim 4
Dependent Claim
28 words
A sight system according to claim 1, for use in a stationary-own-vehicle (SOV) situation, and including means for deriving said gun movement signal directly from the gun disposition.
Claim 5
Dependent Claim
25 words
A sight system according to claim 2, and incorporating switching means for selecting the appropriate gun movement signal according to the situation, MOV or SOV.
Claim 6
Dependent Claim
49 words
A sight system accoding to claim 1, 2, 3, or 4, in which said demand signal and said gun movement signal constitute components of a gun control signal and wherein a further component consists of a signal representative of the displacement between said boresight mark and said aiming mark.
Claim 7
Dependent Claim
89 words
A sight system according to claim 5, including an autolay facility which comprises means for calculating the required aim-off of the gun in response to target movement and factors affecting the fall of the shot and means for substituting a signal representative of said aim-off for said demand signal as a component of said gun control signal, the gun movement signal resulting from the substituted autolay aim-off signal causing the aiming mark to remain in position on the target scene as the boresight mark moves to the aim-off position.
Claim 8
Dependent Claim
31 words
A sight system according to claim 6, including means for comparing the calculated aim-off with the displacement of the boresight mark and initiating a firing signal when the comparison shows equality.
Claim 9
Dependent Claim
43 words
A sight system according to claim 1 including means responsive to alignment of the boresight with the aiming mark to initiate operation of a rangefinder, the system including means for generating an aiming mark with a magnitude inversely proportional to the target range.
Claim 10
Dependent Claim
35 words
A sight system according to claim 8, wherein said aiming mark is in the form of an enclosure of standard form such as just to enclose the view of a standard target at all ranges.
Claim 11
Dependent Claim
28 words
A sight system according to claim 8 or claim 9, wherein said aiming mark is in the form of an ellipse, said standard target being a military tank.
Claim 12
Dependent Claim
67 words
A sight system according to claim 1 for use in both moving-own-vehicle (MOV) and stationary-own-vechicle (SOV) situations, said system including means for integrating a rate gyro signal of the gun stabilizing system to constitute said gun movement signal, means for deriving said gun movement signal directly from the gun disposition, and switching means for selecting the appropriate gun movement signal according to the situation MOV or SOV.
Claim 13
Dependent Claim
25 words
A sight system according to claim 3 and incorporating switching means for selecting the appropriate gun movement signal according to the situation, MOV or SOV.
Claim 14
Dependent Claim
46 words
A sight system according to claim 12 in which said demand signal and said gun movement signal constitute components of a gun control signal and wherein a further component consists of a signal representative of the displacement between said bore sight mark and said aiming mark.
References Cited (Backward Citations)
US3997762A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |