Patent US3556225A successfully refreshed from Google Patents.
US4540140A
Expired / Lapsed
US
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Passive missile guidance process
Assignee: Societe Anonyme de Telecommunications SAT
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Filing: 1983-07-20
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Granted: 1985-09-10
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Expires: 2003-07-20
Abstract
Abstract The process consists in guiding the missile firstly by an electromagnetic guidance by interferometric bases up to the proximity of the target, then by infrared guidance up to the target. Electromagnetic guidance is effected by maintaining constant the angle (α) between the velocity vector (V) of the missle (E) and the straight line (R") passing through the missile (E) and the projection (C") of the target (C) on the earth (S). The process is particularly applicable to the interception of targets travelling at low altitude above the sea.
Inventors
- 👤 Pierre Levy
- 👤 Andre Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:27
CPC Classifications
F; F41; F41G; F41G7/00; F41G7/20; F41G7/22; F41G7/2273; F41G7/2286; F41G7/2253; F41G7/2293
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
75 words
Process for passive guidance of a guided missile to a target, in which, over at least part of its path, the missile is guided by a passive electromagnetic guidance, wherein, on said part of its path, the missile is guided by maintaining constant the angular variation (α) between its velocity vector (V) and a straight line (R") passing through the missile (E) and a projection (C") of the target (C) on the earth's globe (S).
Claim 2
Dependent Claim
75 words
Process for passive guidance of a guided missile to a target, in which, over at least part of its path, the missile is guided by a passive electromagnetic guidance, wherein, on said part of its path, the missile is guided by maintaining constant the angular variation (α) between its velocity vector (V) and a straight line (R") passing through the missile (E) and a projection (C") of the target (C) on the earth's globe (S).
Claim 3
Dependent Claim
17 words
The process of claim 1, characterized in that the angular variation (α) is maintained constant in bearing.
Claim 4
Dependent Claim
22 words
The process of claim 1, characterized in that the angular variation (α) is maintained in a range of from 0.5 to 5°.
Claim 5
Dependent Claim
33 words
The process of claim 1, characterized in that the missile is guided electromagnetically up to the proximity of the target and thereafter is guided up to the target by an infrared guidance system.
Claim 6
Dependent Claim
18 words
The process of claim 4, characterized in that the electromagnetic guidance of the missile is an interferometric guidance.
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) | 1988-09-09 | 1989-03-11 | 1989-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-09 | 1993-03-11 | 1993-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-09 | 1997-03-11 | 1997-09-10 | $7700.00 | Window Closed / Lapsed |