US3584513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-calibrating system for navigational instruments
Assignee: Kearfott Guidance and Navigation Corp
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Filing: 1969-01-06
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Granted: 1971-06-15
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Expires: 1989-01-06
Abstract
Abstract A system for recovering the drift coefficients of two navigational gyros for a vehicle, each of the gyros having a rotatable outer casing and two input axes, wherein the gyros are positioned so that their spin axes extend at an angle to each other and a precession torque is applied to the gyros to maintain their spin axes in a predetermined spatial position. The casing of each gyro is rotated about an axis parallel to its spin axis to predetermined angular positions, so that a drift coefficient can be established for each input axis.
Inventors
- 👤 Robert L Gates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:24
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C25/00; G01C25/005; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1221; Y10T74/1293
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
162 words
An apparatus for recovering the drift coefficients of two navigational gyros for a vehicle, each of said gyros having a rotatable outer casing and two input axes, said apparatus comprising means for mounting said gyros with respect to said vehicle so that their spin axes extend at an angle to each other, means for applying a precession torque to said gyros to maintain their spin axes in a predetermined spatial position, and means for rotating the casing of each gyro about an axis parallel to its spin axis to predetermine angular positions, to permit a respective drift coefficient to be established for at least three of the input axis common to said two gyros, said means for mounting said gyros comprising a vehicle platform stabilized with respect to said three axes, and said means for rotating the casing of each gyro comprises a turntable means rotatably mounted on said platform and having stop means engageable therewith to define said predetermined angular positions.
Claim 2
Independent Claim
162 words
An apparatus for recovering the drift coefficients of two navigational gyros for a vehicle, each of said gyros having a rotatable outer casing and two input axes, said apparatus comprising means for mounting said gyros with respect to said vehicle so that their spin axes extend at an angle to each other, means for applying a precession torque to said gyros to maintain their spin axes in a predetermined spatial position, and means for rotating the casing of each gyro about an axis parallel to its spin axis to predetermine angular positions, to permit a respective drift coefficient to be established for at least three of the input axis common to said two gyros, said means for mounting said gyros comprising a vehicle platform stabilized with respect to said three axes, and said means for rotating the casing of each gyro comprises a turntable means rotatably mounted on said platform and having stop means engageable therewith to define said predetermined angular positions.
Claim 3
Dependent Claim
20 words
The apparatus of claim 1 wherein the spin axes of said gyros extend at a 90* angle to each other.
Claim 4
Dependent Claim
121 words
The apparatus of claim 1 wherein each of said gyro casings is attached to each of said turntable means for rotation therewith respectively, and said engaging means comprises a projecting means extending from said turntable, said means for rotating each gyro casing further comprising means for supporting said turntable for rotation about an axis coinciding with the spin axis of each respective gyro so that said projecting means moves in a generally circular path, stop means carried by said support means and extending in said path to engage said projecting means to stop said turntable after a predetermined angular rotation thereof, and means selectively operable to move said stop means out of said path to permit further rotation of said turntable.
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |