Patent US3860930A successfully refreshed from Google Patents.
US3860930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radar antenna scan apparatus
Assignee: Texas Instruments Inc
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Filing: 1973-08-23
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Granted: 1975-01-14
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Expires: 1993-08-23
Abstract
Abstract A radar antenna scan drive employs a planetary type drive. An RF antenna is fixed to rotate with a planet gear while the planet rotates around a sun gear. The swept volume of the RF antenna, as it scans, is shaped to be noncircular by the ratios selected for the planetary drive. The swept volume shape is utilized to package a larger RF aperture antenna in a fixed available space that is not circular.
Inventors
- 👤 Robert K Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:49
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/27; H01Q1/28; H01Q1/281; H01Q3/00; H01Q3/02; H01Q3/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
189 words
A radar scan apparatus for translating a rotating antenna within a confined conical shaped space in an aircraft for increasing the size of the antenna aperture for an antenna system comprising: a. a drive shaft; b. means coupled to the drive shaft for rotating the drive shaft; c. a support means including a first support member attached to the drive shaft for rotation therewith, and a second support member rotatably mounted in said first support member, said second support member eccentrically disposed to the drive shaft; d. an antenna attached to the second support member for rotation therewith; and e. a drive means responsive to the rotation of the drive shaft for rotating the second support member and its antenna one half rotation in a direction opposite to that of the first support means for every rotation of the first support means whereby when said first support member is in the rearmost position the antenna extends with its maximum dimension perpendicular to the center line of the aircraft and moves the rotating antenna within a substantially triangular envelope to conform to the walls of the confined conical shaped space.
Claim 2
Dependent Claim
189 words
A radar scan apparatus for translating a rotating antenna within a confined conical shaped space in an aircraft for increasing the size of the antenna aperture for an antenna system comprising: a. a drive shaft; b. means coupled to the drive shaft for rotating the drive shaft; c. a support means including a first support member attached to the drive shaft for rotation therewith, and a second support member rotatably mounted in said first support member, said second support member eccentrically disposed to the drive shaft; d. an antenna attached to the second support member for rotation therewith; and e. a drive means responsive to the rotation of the drive shaft for rotating the second support member and its antenna one half rotation in a direction opposite to that of the first support means for every rotation of the first support means whereby when said first support member is in the rearmost position the antenna extends with its maximum dimension perpendicular to the center line of the aircraft and moves the rotating antenna within a substantially triangular envelope to conform to the walls of the confined conical shaped space.
Claim 3
Dependent Claim
63 words
A radar scan apparatus according to claim 1 wherein said drive means includes a planetary gear mounted on a shaft of the second support member and at least a section of a ring gear attached to the aircraft within the confined conical space, said planetary gear meshing with the ring gear and driven by the first support member attached to the drive shaft.
Claim 4
Dependent Claim
50 words
A radar scan apparatus according to claim 1 wherein said drive means includes a first pulley attached to the second support member, a second pulley attached to the drive shaft, and a belt interconnecting the first and second pulleys, said first and second pulleys having a size ratio of 1:1.5.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |