Patent US3142183A successfully refreshed from Google Patents.
US3142183A
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US
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Free gyroscope
Assignee: Massachusetts Institute of Technology
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Filing: 1961-04-07
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Granted: 1964-07-28
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Expires: 1981-04-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Ernest B Dane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:31
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/04; G01C19/16; G01C19/18; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1261; Y10T74/1264; Y10T74/1282
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A PRECISION FREE GYROSCOPE COMPRISING (A) AN INSTRUMENT CASE, (B) A SPHERICAL JOURNAL CONTAINED WITHIN SAID CASE, (C) MEANS FOR ROTATING SAID JOURNAL ABOUT AN AXIS OF SAID CASE, (D) MEANS FOR CONSTRAINING THE ROTATION OF SAID JOURNAL TO SAID AXIS, (E) A GYROSCOPE WHEEL HAVING A STABLE SPIN AXIS, (F) A SPHERICAL BUSHING, CENTRALLY FIXED IN SAID WHEEL ENCIRCLING SAID JOURNAL, HAVING A SLIGHTLY GREATER RADIUS OF CURVATURE THAN SAID JOURNAL, (G) MEANS FOR APPLYING A DRAG TORQUE TO SAID WHEEL TO URGE SAID WHEEL TO LAG THE ROTATION OF SAID JOURNAL, CHARACTERIZED IN THAT THE CLEARANCE BETWEEN SAID JOURNAL AND SAID BUSHING IS SUFFICIENT THAT ROLLING CONTACT IS MAINTAINED BETWEEN SAID BUSHING AND SAID JOURNAL AS SAID WHEEL IS DRIVEN BY ROTATION OF SAID JOURNAL AT OPERATING SPEED.
Claim 2
Dependent Claim
130 words
A PRECISION FREE GYROSCOPE COMPRISING (A) AN INSTRUMENT CASE, (B) A SPHERICAL JOURNAL CONTAINED WITHIN SAID CASE, (C) MEANS FOR ROTATING SAID JOURNAL ABOUT AN AXIS OF SAID CASE, (D) MEANS FOR CONSTRAINING THE ROTATION OF SAID JOURNAL TO SAID AXIS, (E) A GYROSCOPE WHEEL HAVING A STABLE SPIN AXIS, (F) A SPHERICAL BUSHING, CENTRALLY FIXED IN SAID WHEEL ENCIRCLING SAID JOURNAL, HAVING A SLIGHTLY GREATER RADIUS OF CURVATURE THAN SAID JOURNAL, (G) MEANS FOR APPLYING A DRAG TORQUE TO SAID WHEEL TO URGE SAID WHEEL TO LAG THE ROTATION OF SAID JOURNAL, CHARACTERIZED IN THAT THE CLEARANCE BETWEEN SAID JOURNAL AND SAID BUSHING IS SUFFICIENT THAT ROLLING CONTACT IS MAINTAINED BETWEEN SAID BUSHING AND SAID JOURNAL AS SAID WHEEL IS DRIVEN BY ROTATION OF SAID JOURNAL AT OPERATING SPEED.
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) | 1967-07-28 | 1968-01-27 | 1968-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-28 | 1972-01-27 | 1972-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-28 | 1976-01-27 | 1976-07-28 | $7700.00 | Window Closed / Lapsed |