Patent US4118707A successfully refreshed from Google Patents.
US4118707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gyro stabilized platform for scanning antenna
Assignee: Toshiba Corp
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Filing: 1977-04-29
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Granted: 1978-10-03
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Expires: 1997-04-29
Abstract
Abstract An antenna apparatus comprising a gimbals with two axes crossing at right angles mounted on a fixed stand, an antenna base attached to said gimbals to be rocked with the rotation of said gimbals and holding an antenna, flywheels attached to said antenna base for stabilizing said antenna base applying the principle of precession of gyro, a first driving mechanism for rocking said antenna in the elevational direction, a second driving mechanism for rocking said antenna in the azimuthal direction, and a third driving mechanism for shifting the center of gravity on said gimbals in a direction across the direction of rotation of said first driving mechanism.
Inventors
- 👤 Takashi Yoshida
- 👤 Kenzo Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:00
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/02; H01Q3/08; H01Q1/00; H01Q1/12; H01Q1/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
149 words
An antenna apparatus comprising a stationary stand, a gimbals having an inner rotary frame connected to the stationary stand to be rotated about a first horizontal axis and an outer rotary frame connected to the inner rotary frame to be rotated about a second horizontal axis normal to the first horizontal axis, an antenna supporting means attached to the gimbals to rock with the rotation thereof, an antenna mounted on the antenna supporting means, a plurality of flywheels attached to the antenna supporting means for stabilizing the antenna supporting means applying the principle of precession of gyro, a first driving mechanism for rocking the antenna in the elevational direction, a second driving mechanism for rocking the antenna in the azimuthal direction, and a third driving mechanism for shifting the center of gravity on the gimbals in a direction across the direction of the rotation of the first driving mechanism.
Claim 2
Dependent Claim
149 words
An antenna apparatus comprising a stationary stand, a gimbals having an inner rotary frame connected to the stationary stand to be rotated about a first horizontal axis and an outer rotary frame connected to the inner rotary frame to be rotated about a second horizontal axis normal to the first horizontal axis, an antenna supporting means attached to the gimbals to rock with the rotation thereof, an antenna mounted on the antenna supporting means, a plurality of flywheels attached to the antenna supporting means for stabilizing the antenna supporting means applying the principle of precession of gyro, a first driving mechanism for rocking the antenna in the elevational direction, a second driving mechanism for rocking the antenna in the azimuthal direction, and a third driving mechanism for shifting the center of gravity on the gimbals in a direction across the direction of the rotation of the first driving mechanism.
Claim 3
Dependent Claim
36 words
An antenna apparatus according to claim 1 wherein said antenna supporting means includes an antenna base amounted on the gimbals and a rotary disc mounted on the antenna base, the antenna mounted on the rotary disc.
Claim 4
Dependent Claim
34 words
An antenna apparatus according to claim 2 wherein said third driving mechanism includes a weight shiftably mounted on the rotary disc and a shifting mechanism mounted on the rotary disc to shift the weight.
Claim 5
Dependent Claim
79 words
An antenna apparatus according to claim 3 wherein said shifting mechanism includes a pair of screw bar supports fixed on the rotary disc at a predetermined interval, a screw bar rotatably supported by the screw bar supports and holding the weight in a screw relationship therewith, a motor for rotating the screw bar and a guide member for preventing the rotation of the weight to slide the weight along the screw bar during the rotation of the screw bar.
Claim 6
Dependent Claim
47 words
An antenna apparatus according to claim 2 wherein said third driving mechanism includes a weight, a rotary solenoid and a connecting member for connecting the weight to the rotary solenoid to rotate the weight in the direction across the direction of rotation of said first driving mechanism.
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) | 1981-10-02 | 1982-04-03 | 1982-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-02 | 1986-04-03 | 1986-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-02 | 1990-04-03 | 1990-10-03 | $7700.00 | Window Closed / Lapsed |