Patent US3304788A successfully refreshed from Google Patents.
US3304788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Earth rotation compensating in inertia navigation
Assignee: Linde Sverige AB
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Filing: 1961-02-03
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Granted: 1967-02-21
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Expires: 1981-02-03
Abstract
No abstract record available.
Inventors
- 👤 Granqvist Carl-Erik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:58
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/34; G01C19/38; G01C21/00; G01C21/10; G01C21/12; G01C21/16; G01C21/18; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1221; Y10T74/1229; Y10T74/1261; Y10T74/1264
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
APPARATUS FOR OBTAINING A FIXED DIRECTION IN SPACE COMPRISING A GYROSCOPE ROTOR, A FIRST GIMBAL SUPPORTING SAID ROTOR AND A SECOND GIMBAL JOURNALLING SAID FIRST GIMBAL, SAID SECOND GIMBAL BEING SUBJECTED TO A PRECESSIONAL FORCE GENERATED BY SAID ROTOR, MEANS JOURNALLING SAID SECOND GIMBAL ABOUT AN AXIS PERPENDICULAR TO THE JOURNAL AXIS BETWEEN SAID FIRST AND SECOND GIMBALS, RESILIENT MEANS BETWEEN SAID FIRST AND SECOND GIMBALS, FOR COUNTERACTING SAID PRECESSIONAL FORCES, MEANS OPERATIVELY CONNECTED TO SAID SECOND GIMBAL FOR SENSING THE ANGLE OF PROCESSION AND FOR GENERATING A SIGNAL PROPORTIONAL THERETO, AND MOTOR MEANS CONNECTED TO SAID SIGNAL GENERATING
Claim 2
Dependent Claim
99 words
APPARATUS FOR OBTAINING A FIXED DIRECTION IN SPACE COMPRISING A GYROSCOPE ROTOR, A FIRST GIMBAL SUPPORTING SAID ROTOR AND A SECOND GIMBAL JOURNALLING SAID FIRST GIMBAL, SAID SECOND GIMBAL BEING SUBJECTED TO A PRECESSIONAL FORCE GENERATED BY SAID ROTOR, MEANS JOURNALLING SAID SECOND GIMBAL ABOUT AN AXIS PERPENDICULAR TO THE JOURNAL AXIS BETWEEN SAID FIRST AND SECOND GIMBALS, RESILIENT MEANS BETWEEN SAID FIRST AND SECOND GIMBALS, FOR COUNTERACTING SAID PRECESSIONAL FORCES, MEANS OPERATIVELY CONNECTED TO SAID SECOND GIMBAL FOR SENSING THE ANGLE OF PROCESSION AND FOR GENERATING A SIGNAL PROPORTIONAL THERETO, AND MOTOR MEANS CONNECTED TO SAID SIGNAL GENERATING
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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |