US3786685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination permanent magnet torquer-eddy current damper for a gyro
Assignee: Bendix Corp
•
Filing: 1971-09-28
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Granted: 1974-01-22
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Expires: 1991-09-28
Abstract
Abstract A permanent magnet torquer-eddy current damper for a gyro includes a copper cylinder supported for rotating with the gyro inner gimbal and a coil assembly mounted on the cylinder. The cylinder is disposed in the magnetic field and relative motion between the field and cylinder is damped to induce currents while torquing is provided through current in the coil assembly. Temperature compensating means are provided for damping and torquing stability.
Inventors
- 👤 E Lademann
- 👤 R Iadarola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:37
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/04; G01C19/30; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1229; Y10T74/1257
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
110 words
A combination torquer-damper device for a gyro having a gimbal which rotates about an axis, comprising: a hollow, cylindrical magnetic stator supported by the gyro and including a plurality of magnetic poles disposed circumferentially around the inside diameter of the stator; a magnetic return path member supported by the gyro and separated from the stator by an air gap; a hollow, cylindrical conductive member supported by the gimbal and rotating therewith, and disposed in the air gap; and a coil assembly supported by the conductive member and including a pluralitY of coils disposed circumferentially around the outside diameter of the conductive member, said coils being disposed between adjacent magnetic poles.
Claim 2
Dependent Claim
110 words
A combination torquer-damper device for a gyro having a gimbal which rotates about an axis, comprising: a hollow, cylindrical magnetic stator supported by the gyro and including a plurality of magnetic poles disposed circumferentially around the inside diameter of the stator; a magnetic return path member supported by the gyro and separated from the stator by an air gap; a hollow, cylindrical conductive member supported by the gimbal and rotating therewith, and disposed in the air gap; and a coil assembly supported by the conductive member and including a pluralitY of coils disposed circumferentially around the outside diameter of the conductive member, said coils being disposed between adjacent magnetic poles.
Claim 3
Dependent Claim
30 words
A device as described by claim 1, including: a temperature compensating element affixed to the stator and providing a magnetic shunt which maintains magnetic flux constant with variations in temperature.
Claim 4
Dependent Claim
35 words
A device as described by claim 1, wherein: a temperature compensating ring is affixed to the outside diameter of the cylinder and provides a magnetic shunt which maintains magnetic flux constant with variations in temperature.
References Cited (Backward Citations)
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Cited
US2805578A
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US2900825A
Cited
US2916919A
Cited
US3031892A
Cited
US3242745A
Cited
US3240075A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |