US3218872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-testing gyroscope
Assignee: Northrop Grumman Corp
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Filing: 1961-09-26
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Granted: 1965-11-23
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Expires: 1981-09-26
Abstract
No abstract record available.
Inventors
- 👤 Edward L Swainson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:34
CPC Classifications
G; G01; G01C; G01C25/00; G01C25/005; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1261; Y10T74/1279
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN A GYROSCOPE HAVING A ROTOR DISPOSED WITHIN A GIMBAL, FOR ROTATION ABOUT A FIRST AXIS, SAID GIMBAL BEING SECURED WITHIN AN OUTER CASING FOR LIMITED ANGULAR ROTATION ABOUT A SECOND AXIS NORMAL TO SAID FIRST AXIS BY A BEARING AT ONE END AND A RESTRAINING SPRING OF FERROMAGNETIC MATERIAL AT AN OPPOSITE END, A COIL WOUND ABOUT SAID RESTRAINING SPRING AND SECURED TO SAID CASING, AND A PLURALITY OF MAGNETS DISPOSED ABOUT THE PERIPHERY OF SAID ROTOR FOR ROTATION THEREWITH TO INDUCE AN ALTERNATING VOLTAGE IN SAID COIL HAVING A FREQUENCY AND MAGNITUDE CORRESPONDING TO THE SPEED OF ROTATION OF THE ROTOR.
Claim 2
Dependent Claim
103 words
IN A GYROSCOPE HAVING A ROTOR DISPOSED WITHIN A GIMBAL, FOR ROTATION ABOUT A FIRST AXIS, SAID GIMBAL BEING SECURED WITHIN AN OUTER CASING FOR LIMITED ANGULAR ROTATION ABOUT A SECOND AXIS NORMAL TO SAID FIRST AXIS BY A BEARING AT ONE END AND A RESTRAINING SPRING OF FERROMAGNETIC MATERIAL AT AN OPPOSITE END, A COIL WOUND ABOUT SAID RESTRAINING SPRING AND SECURED TO SAID CASING, AND A PLURALITY OF MAGNETS DISPOSED ABOUT THE PERIPHERY OF SAID ROTOR FOR ROTATION THEREWITH TO INDUCE AN ALTERNATING VOLTAGE IN SAID COIL HAVING A FREQUENCY AND MAGNITUDE CORRESPONDING TO THE SPEED OF ROTATION OF THE ROTOR.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |