US3209245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inductive metal detection device
Assignee: General Electric Co
•
Filing: 1961-12-05
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Granted: 1965-09-28
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Expires: 1981-12-05
Abstract
No abstract record available.
Inventors
- 👤 Lee J Hauge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:17
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/08; G01V3/10; G01V3/101; G01V3/102
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A METAL DETECTING SYSTEM COMPRISING, A SOURCE OF ALTERNATING CURRENT HAVING A FREQUENCY EFFECTIVE TO PRODUCE EDDY CURRENTS IN SAID METAL, A HIGH Q CIRCUIT WITH TO RESONATE AT THE FREQUENCY OF SAID ALTERNATING CURRENT, MEANS FOR INDUCTIVELY COUPLING SAID HIGH Q CIRCUITS WITH SAID SOURCE OF ALTERNATING CURRENT THEREBY DEVELOPING A VOLTAGE THEREACROSS, AND AMPLITUDE DETECTING MEANS RESPONSIVE TO SAID VOLTAGE FOR DETECTING A REDUCTION THEREOF DUE TO THE PROXIMITY OF SAID METAL.
Claim 2
Dependent Claim
74 words
A METAL DETECTING SYSTEM COMPRISING, A SOURCE OF ALTERNATING CURRENT HAVING A FREQUENCY EFFECTIVE TO PRODUCE EDDY CURRENTS IN SAID METAL, A HIGH Q CIRCUIT WITH TO RESONATE AT THE FREQUENCY OF SAID ALTERNATING CURRENT, MEANS FOR INDUCTIVELY COUPLING SAID HIGH Q CIRCUITS WITH SAID SOURCE OF ALTERNATING CURRENT THEREBY DEVELOPING A VOLTAGE THEREACROSS, AND AMPLITUDE DETECTING MEANS RESPONSIVE TO SAID VOLTAGE FOR DETECTING A REDUCTION THEREOF DUE TO THE PROXIMITY OF SAID METAL.
References Cited (Backward Citations)
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Cited
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US2580670A
Cited
GB760780A
Cited
US2994015A
Cited
US2819447A
Cited
US2875429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |