Patent US3616699A successfully refreshed from Google Patents.
US3616699A
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US
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Gimbal zone transfer apparatus
Assignee: Boeing North American Inc
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Filing: 1969-09-29
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Granted: 1971-11-02
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Expires: 1989-09-29
Abstract
Abstract A FOLLOW-UP CONTROL SYSTEM FOR A THREE GIMBAL FOUR AXIS INERIAL PLATFORM WHICH UTILIZES EULER ANGLE LOGIC AND ELECTRONIC SIGN CHANGING TO AVOID GIMBAL FLIPPING WHEN THE VEHICLE ON WHICH THE PLATFORM SYSTEM IS MOUNTED IS MANEUVERING AT OR NEAR THE PITCH 90* ATTITUDE WITH A LIMITED AMOUNT OF ROLL ATTITUDE AND WHICH ALLOWS GIMBAL FLIPPING WHEN THE AIRCRAFT PITCHES WITH AN AMOUNT OF ROLL THAT ALLOWS SATISFACTORY DYNAMIC CONTROL OF THE GIMBAL.
Inventors
- 👤 Zay C Brand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:24
CPC Classifications
G; G01; G01C; G01C21/00; G01C21/10; G01C21/12; G01C21/16; G01C21/18; G01C19/00; G01C19/02; G01C19/04; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1221; Y10T74/20; Y10T74/20396; Y10T74/20402; Y10T74/2042; Y10T74/20426
Claims Analysis
Total Claims: 0
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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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |