US3226971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compass alignment system
Assignee: General Precision Inc
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Filing: 1962-12-06
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Granted: 1966-01-04
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Expires: 1982-12-06
Abstract
No abstract record available.
Inventors
- 👤 Peter R Tierney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:35
CPC Classifications
G; G01; G01C; G01C25/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
172 words
APPARATUS FOR ADJUSTING A GYROSCOPIC COMPASS TO INDICATE THE TRUE HEADING OF A VEHICLE ON WHICH IT IS INSTALLED, COMPRISING, A LIGHT SOURCE POSITIONED ON A LINE OF KNOWN AZIMUTH INTERSECTING SAID VEHICLE, A TELESCOPE MOUNTED ON SAID VEHICLE AND ROTATABLE ABOUT A VERTICAL AXIS WHICH AXIS INTERSECTS SAID LINE, A RADIANT ENERGY SENSOR MOUNTED IN THE FOCAL PLANE OF SAID TELESCOPE FOR GENERATING SIGNAL INDICATIVE OF THE POWER AND POSITION OF THE CENTROID OF THE INCIDENT ILLUMINATION, A SERVO MECHANISM FOR ROTATING SAID TELESCOPE IN ACCORDANCE WITH SIGNALS APPLIED THERETO, A FIRST SHAFT ROTATABLE WITH SAID TELESCOPE THE ANGULAR POSITION OF WHICH REPRESENTS THE ANGLE BETWEEN THE LONGITUDINAL AXIS OF SAID VEHICLE AND THE OPTICAL AXIS OF SAID TELESCOPE, A SECOND SHAFT ANGULARLY POSITIONED TO REPRESENT THE KNOWN AZIMUTH OF SAID LINE, MEANS FOR COMBINING THE ANGULAR POSITIONS OF SAID FIRST AND SECOND SHAFTS SO AS TO POSITION A THIRD SHAFT AT AN ANGLE INDICATIVE OF THE TRUE HEADING OF SAID VEHICLE, A FOURTH SHAFT CONNECTED TO SAID COMPASS FOR INDICATING
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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |