Magnetometer compass
Abstract
Abstract THIS INVENTION DESCRIBES A MAGNETIC COMPASS SUITABLE FOR USE IN A SMALL CRAFT. THE COMPASS EMPLOYS A SINGLE MAGNETOMETER FOR SENSING THE EARTH''S MAGNETIC FIELD AND ASSOCIATED CIRCUITRY FOR COMPUTING THE MAGNETIC HEADING. THE ASSOCIATED CIRCUITRY INCLUDES A PITCH SENSITIVE SIGNAL GENERATOR WHICH TOGETHER WITH ANALOG CIRCUITS COMPENSATES FOR PITCHING MOTIONS OF THE VESSEL IN WHICH IT IS OPERATED. MANUALLY SET SIGNAL SOURCES PROVIDE SIGNALS FOR COMPENSA- TION OF THE HORIZONTAL AND VERTICAL COMPONENTS OF THE EARTH''S MAGNETIC FIELD OVER THE AREA IN WHICH THE DEVICE IS OPERATED. AN ADJUSTABLE MOUNTING FOR THE MAGNETOMETER SENSOR PLACES THE DEVICE IN A REMOTE LOCATION AND PROVIDES FOR ADJUSTMENT WHICH EFFECTIVELY COMPENSATES THE COMPASS FOR ERRORS CAUSED BY VEHICLE ROLL.
Inventors
- 👤 Wayne E Burt
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |