Patent US3807658A successfully refreshed from Google Patents.
US3807658A
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Rate transmittal method for beamrider missile guidance
Assignee: United States Department of the Army
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Filing: 1972-10-20
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Granted: 1974-04-30
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Expires: 1992-10-20
Abstract
Abstract In beamrider guidance of a missile toward a target, tracking or error determination is accomplished on board the missile. Rate information obtained at the launch site must be transmitted to the missile if it is to be used in the guidance thereof. Rate information allows correction of the inherent lag of a missile behind the target line-of-sight. A method of electronically accomplishing the equivalent of an optical boresight shift allows the missile direction to be adjusted to compensate for the inherent lag of the missile as it moves toward the target.
Inventors
- 👤 W Miller
- 👤 J Duke
- 👤 R Sitton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:02
CPC Classifications
F; F41; F41G; F41G7/00; F41G7/20; F41G7/24; F41G7/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
110 words
In a beamrider missile guidance system wherein a target is tracked by visual line-of-sight from a tracking station and the missile is directed toward said target substantially along the line-of-sight axis, a method of transmitting rate information within the beam path and comprising the steps of: directing optical energy from said target tracking station along the line-of-sight to the target, spatially encoding said optical energy for providing a plurality of individually modulated optical frequency beams, forming said individually modulated beams into a single beam of adjoining segments, and modifying at least one of said beam segments by alternately modulating the beam segment with the modulation rate of an adjoining segment.
Claim 2
Dependent Claim
110 words
In a beamrider missile guidance system wherein a target is tracked by visual line-of-sight from a tracking station and the missile is directed toward said target substantially along the line-of-sight axis, a method of transmitting rate information within the beam path and comprising the steps of: directing optical energy from said target tracking station along the line-of-sight to the target, spatially encoding said optical energy for providing a plurality of individually modulated optical frequency beams, forming said individually modulated beams into a single beam of adjoining segments, and modifying at least one of said beam segments by alternately modulating the beam segment with the modulation rate of an adjoining segment.
Claim 3
Dependent Claim
78 words
In a beamrider missile guidance system a method of transmitting rate information within the beam path as set forth in claim 1 and further comprising the steps of: forming said beam segments into a quadrant, nutating said beam for sequentially sweeping a portion of respective quadrants across the missile directed toward said target, and alternately modulating said modified beam segment with a portion of said adjoining segment signal modulation which portion is equal in magnitude to missile lag.
Claim 4
Dependent Claim
57 words
In a beamrider missile guidance system a method of transmitting rate information within the beam path as set forth in claim 2 and further comprising the step of: detecting by said missile the duration of respective quadrant modulation rates during nutation for the further step of controlling the error correction of the missile trajectory toward said target.
References Cited (Backward Citations)
US3028807A
Cited
US3255984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-29 | 1977-10-29 | 1978-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-29 | 1981-10-29 | 1982-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-29 | 1985-10-29 | 1986-04-30 | $7700.00 | Window Closed / Lapsed |