US3207978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic field detector utilizing res-onant non-linear inductors
Assignee: RTX Corp
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Filing: 1960-05-20
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Granted: 1965-09-21
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Expires: 1980-05-20
Abstract
No abstract record available.
Inventors
- 👤 Hrant H Sarkissian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:16
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A MAGNETIC FIELD DETECTOR INCLUDING IN COMBINATION A NON-LINEAR INDUCTOR HAVING AN INDUCCTANCE WHICH WITHIN A CERTAIN REGION DECREASES WITH INCRESE IN CURRENT THERETHROUGH, A FREQUENCY RESPONSIVE CIRCUIT INCLUDING THE INDUCTOR, A CONSTANT FREQUENCY SOURCE, MEANS CONNECTING THE SOURCE TO THE CIRCUIT, THE SOURCE PROVIDING SUCH OUTPUT TO OPERATE THE INDUCTOR WITHIN SAID REGION, THE CIRCUIT HAVING A FREQUENCY OF MAXIMUM FIELD TO BE DETECTED, AND CIABLY LESS THAN THE SOURCCE FREQUENCY, MEANS FOR COUPLING TO THE INDUCTOR THE MAGNETIC FIELD TO BE DETECTED, AND MMEANS RESPONSIVE TO THE FUNDAMENTAL SOURCE FREQUENCY COMPONENT OF CURRENT THROUGH TTHE CIRCUIT FOR PROVIDING A DETECTION SIGNAL.
Claim 2
Dependent Claim
103 words
A MAGNETIC FIELD DETECTOR INCLUDING IN COMBINATION A NON-LINEAR INDUCTOR HAVING AN INDUCCTANCE WHICH WITHIN A CERTAIN REGION DECREASES WITH INCRESE IN CURRENT THERETHROUGH, A FREQUENCY RESPONSIVE CIRCUIT INCLUDING THE INDUCTOR, A CONSTANT FREQUENCY SOURCE, MEANS CONNECTING THE SOURCE TO THE CIRCUIT, THE SOURCE PROVIDING SUCH OUTPUT TO OPERATE THE INDUCTOR WITHIN SAID REGION, THE CIRCUIT HAVING A FREQUENCY OF MAXIMUM FIELD TO BE DETECTED, AND CIABLY LESS THAN THE SOURCCE FREQUENCY, MEANS FOR COUPLING TO THE INDUCTOR THE MAGNETIC FIELD TO BE DETECTED, AND MMEANS RESPONSIVE TO THE FUNDAMENTAL SOURCE FREQUENCY COMPONENT OF CURRENT THROUGH TTHE CIRCUIT FOR PROVIDING A DETECTION SIGNAL.
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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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |