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Patent US3222795A successfully refreshed from Google Patents.
US3222795A
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Accelerated north-seeking gyrocompassing system
Assignee: General Precision Inc
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Filing: 1960-05-25
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Granted: 1965-12-14
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Expires: 1980-05-25
Abstract
No abstract record available.
Inventors
- 👤 James C Gevas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:22
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/34; G01C19/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A GYROSCOPIC SYSTEM FOR RAPIDLY DETERMINING TRUE NORTH INCLUDING A PLATFORM HAVING AN EAST-WEST INPUT AXIS GYRO THEREON AND CONNECTED IN FEEDBACK RELATION TO THE PLATFORM TO STABILIZE THE SAME, MEANS FOR POSITIONING THE PLATFORM IN AN APPROXIMATED NORTH-SOUTH HEADING, MEANS RESPONSIVE TO THE PROCESSION OF THE EAST-WEST INPUT AXIS GYRO IN A FIRST POSITION RESULTING FROM THE ANGULAR ROTATION OF THE EARTH FOR PRODUCING A FIRST SIGNAL, MEANS FOR ROTATING THE INPUT AXIS OF SAID GYRO TO A SECOND POSITION APPROXIMATELY 180 SPACIAL DEGREES DISPLACED FROM SAID FIRST POSITION, MEANS RESPONSIVE TO PROCESSION OF SAID GYRO IN SAID SECTION POSITION FOR PRODUCING A SECOND SIGNAL, AND COMPUTING MEANS RESPONSIVE TO SAID FIRST AND SECOND SIGNALS AND PROVIDING AN OUTPUT PROPORTIONAL TO THE ERROR BETWEEN THE HEADING ANGLE OF THE PLATFORM AND TRUE NORTH.
Claim 2
Dependent Claim
134 words
A GYROSCOPIC SYSTEM FOR RAPIDLY DETERMINING TRUE NORTH INCLUDING A PLATFORM HAVING AN EAST-WEST INPUT AXIS GYRO THEREON AND CONNECTED IN FEEDBACK RELATION TO THE PLATFORM TO STABILIZE THE SAME, MEANS FOR POSITIONING THE PLATFORM IN AN APPROXIMATED NORTH-SOUTH HEADING, MEANS RESPONSIVE TO THE PROCESSION OF THE EAST-WEST INPUT AXIS GYRO IN A FIRST POSITION RESULTING FROM THE ANGULAR ROTATION OF THE EARTH FOR PRODUCING A FIRST SIGNAL, MEANS FOR ROTATING THE INPUT AXIS OF SAID GYRO TO A SECOND POSITION APPROXIMATELY 180 SPACIAL DEGREES DISPLACED FROM SAID FIRST POSITION, MEANS RESPONSIVE TO PROCESSION OF SAID GYRO IN SAID SECTION POSITION FOR PRODUCING A SECOND SIGNAL, AND COMPUTING MEANS RESPONSIVE TO SAID FIRST AND SECOND SIGNALS AND PROVIDING AN OUTPUT PROPORTIONAL TO THE ERROR BETWEEN THE HEADING ANGLE OF THE PLATFORM AND TRUE NORTH.
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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |