US3741020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic gyro torquer
Assignee: Bendix Corp
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Filing: 1971-08-18
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Granted: 1973-06-26
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Expires: 1991-08-18
Abstract
Abstract An electromagnet is arranged with a gyro so that eddy currents generated by movement of a conductor in the field of the magnet provide a precessionaly torque, a component of which decelerates or opposes gyro rotation when the spin axis of the gyro is not coincident with the magnet axis. When said axes are coincident, no further precessional and decelerating torques are provided.
Inventors
- 👤 C Hurlburt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:38
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/04; G01C19/30; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1229; Y10T74/1232; Y10T74/125; Y10T74/1261; Y10T74/1279
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
152 words
A gyroscopic system, comprising: a housing an outer gimbal journalled in the housing for displacement about a first axis; an inner gimbal pivotally mounted to the outer gimbal for displacement about a second axis; a rotor journalled in the inner gimbal for spinning about a third axis; said first, second and third axes being mutually perpendicular; a conductive member supported for movement in response to spinning of the rotor and having an axis of symmetry coincident with the third axis; a magnet having a symmetrical flux field aNd supported by the inner gimbal below the conductive member so that the magnetic flux intercepts the conductive ember; and the magnet and conductive member arranged so that as the conductive member moves it cuts through the flux filed of the magnet for providing a torque which opposes gyro rotation only when the gyro spin axis and the axis of flux symmetry are not coincident.
Claim 2
Dependent Claim
152 words
A gyroscopic system, comprising: a housing an outer gimbal journalled in the housing for displacement about a first axis; an inner gimbal pivotally mounted to the outer gimbal for displacement about a second axis; a rotor journalled in the inner gimbal for spinning about a third axis; said first, second and third axes being mutually perpendicular; a conductive member supported for movement in response to spinning of the rotor and having an axis of symmetry coincident with the third axis; a magnet having a symmetrical flux field aNd supported by the inner gimbal below the conductive member so that the magnetic flux intercepts the conductive ember; and the magnet and conductive member arranged so that as the conductive member moves it cuts through the flux filed of the magnet for providing a torque which opposes gyro rotation only when the gyro spin axis and the axis of flux symmetry are not coincident.
Claim 3
Dependent Claim
32 words
A gyroscopic system as described by claim 1, wherein: the magnet has an E-shaped cross-section and includes a central magnetic pole of one polarity surrounded by a circular pole of opposite polarity.
Claim 4
Dependent Claim
29 words
A gyroscopic system as described by claim 1, wherein: the conductive member is supported by the rotor for rotating therewith to act as part of the gyro spin inertia.
Claim 5
Dependent Claim
75 words
A gyroscopic system as described by claim 1, wherein: movement of the conductive member through the flux field of the magnet causes eddy currents to be generated which induce an electromotive force in the conductive member; and when the gyro spin axis and axis of flux symmetry are not coincident the electromotive force causes current to flow in the conductive member in a sense so as to create a field opposing motion causing said current.
Claim 6
Dependent Claim
43 words
A gyroscopic system as described by claim 4, wherein: symmetric currents will flow in two halves of the conductive member on either side of an axis normal to the rotor spin axis and the axis of symmetry of the conductive member coincident therewith.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |