US3135199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetometer
Assignee: Individual
•
Filing: 1945-08-03
•
Granted: 1964-06-02
•
Expires: 1965-08-03
Abstract
No abstract record available.
Inventors
- 👤 Thomas B Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:30
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
117 words
A TOTAL FIELD FIRING CONTROL SYSTEM ADAPTED TO DETECT A VESSEL MOVING RELATIVELY WITH RESPECT THERETO AND TO OPERATE A FIRING CIRCUIT AS THE VESSEL IS DETECTED COMPRISING, IN COMBINATION, A TOTAL FIELD MAGNETOMETER DETECTOR COMPRISING A PLURALITY OF MATCHED INDUCTORS ADAPTED TO YIELD AN INDUCTANCE DEPRESSION SUBSTANTIALLY PROPORTIONAL TO THE SQUARE OF THE SCALAR VALUE OF THE AMBIENT MAGNETIC FIELD CAUSED BY THE VESSEL MOVING RELATIVELY WITH RESPECT THERETO, SAID INDUCTANCE DEPRESSION BEING YIELDED SUBSTANTIALLY INDEPENDENTLY OF THE DIRECTION OF THE FIELD, A CIRCUIT FOR PRODUCING A SIGNAL VARIABLY IN ACCORDANCE WITH VARIATIONS IN SAID INDUCTANCE DEPRESSION, AND A CIRCUIT CONTROLLED BY SAID SIGNAL FOR OPERATING SAID FIRING CIRCUIT WHEN THE SIGNAL REACHES A PREDETERMINED VALUE.
References Cited (Backward Citations)
US1665397A
Cited
US2252059A
Cited
US2241499A
Cited
US2436394A
Cited
US2390051A
Cited
US2374166A
Cited
US2438964A
Cited
US2403347A
Cited
US2427666A
Cited
US2485931A
Cited
US2412046A
Cited
US2379716A
Cited
US2477337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |