Vertical reference system
Abstract
Abstract A VERTICAL REFERENCE SYSTEM IS PROVIDED FOR SUPPLYING OUTPUT ELECTRICAL SIGNAL PROPORTIONAL TO THE SINES OF THE ANGLES OF TILT OF A STRUCTURE WITH RESPECT TO THE VERTIAL ABOUT TWO TILT AXES AT RIGHT ANGLES TO EACH OTHER. THE SPECIFIC SYSTEM DISCLOSED INCLUDES A VERTICAL GYROSCOPE HAVING A ROTOR MOUNTED IN INNER AND OUTER GIMBALS ON A GYROSCOPE SUPORT WHICH IN TURN IS RIGIDLY SECURED TO THE STRUCTURE SUBJECT TO BEING TILTED. TWO FORCES BALANCED ACCELEROMETERS ARE SECURED TO THE GYROSCOPE SUPPORT AND EACH IS POSITIONED TO SENSE THE ANGLE OF TILT OF THE STRUCTURE ABOUT ONE OF SUCH TILT AXES. THE ACCELEROMETERS ARE EMPLOYED IN CONJUNCTION WITH PICKOFFS AND TORQUES ON THE AXES OF THE GIMBALS TO MAINTAIN THE SPIN AXES OF THE GYROSCOPE VERTICAL. THE OUTPUT SIGNALS ARE OBTAINED FROM THE PICKOFFS ON THE GIMBAL AXES.
Inventors
- 👤 James W Deer
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |