US3201562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized eddy current seam follower
Assignee: Airco Inc
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Filing: 1963-02-28
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Granted: 1965-08-17
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Expires: 1983-02-28
Abstract
No abstract record available.
Inventors
- 👤 Anderson Nelson Edward
- 👤 Severa B Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:46
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/12; B23K9/127; B23K9/1272; B23K9/1276; B23Q; B23Q35/00; B23Q35/04; B23Q35/08; B23Q35/12; B23Q35/127; B23Q35/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
IN AN EDDY CURRENT SEAM FOLLOWER, IN COMBINATION, A U-SHAPED MAGNETIC CORE, A PAIR OF PICK-UP COILS MOUNTED ON THE TWO OPPOSITE LEGS OF THE SAID CORE, AN EXCITER COIL MOUNTED ON THE MIDDLE PORTION OF THE SAID CORE, THE POSITION OF SAID EXCITER COIL ALONG SAID CORE RELATIVE TO SAID PICK-UP COILS BEING SUCH THAT A MAGNETIC FIELD SET UP IN SAID CORE IN THE ABSENCE OF NEARBY METAL OBJECTS BY SAID EXCITER COIL INDUCES VOLTAGES SUBSTANTIALLY IN PHASE WITH EACH OTHER IN SAID PICK-UP COILS, AND THE RELATIVE POSITIONS OF SAID PICK-UP COILS ALONG SAID CORE RELATIVE TO SAID EXCITER COIL BEING SUCH THAT A MAGNETIC FIELD SET UP IN SAID CORE BY SAID EXCITER COIL IN THE ABSENCE OF NEARBY METAL OBJECTS INDUCES SUBSTANTIALLY EQUAL MAGNITUDES OF VOLTAGES IN SAID TWO PICK-UP COILS, AND MEANS CONNECTING SAID PICK-UP COILS IN PHASE OPPOSING RELATIONSHIP.
Claim 2
Dependent Claim
146 words
IN AN EDDY CURRENT SEAM FOLLOWER, IN COMBINATION, A U-SHAPED MAGNETIC CORE, A PAIR OF PICK-UP COILS MOUNTED ON THE TWO OPPOSITE LEGS OF THE SAID CORE, AN EXCITER COIL MOUNTED ON THE MIDDLE PORTION OF THE SAID CORE, THE POSITION OF SAID EXCITER COIL ALONG SAID CORE RELATIVE TO SAID PICK-UP COILS BEING SUCH THAT A MAGNETIC FIELD SET UP IN SAID CORE IN THE ABSENCE OF NEARBY METAL OBJECTS BY SAID EXCITER COIL INDUCES VOLTAGES SUBSTANTIALLY IN PHASE WITH EACH OTHER IN SAID PICK-UP COILS, AND THE RELATIVE POSITIONS OF SAID PICK-UP COILS ALONG SAID CORE RELATIVE TO SAID EXCITER COIL BEING SUCH THAT A MAGNETIC FIELD SET UP IN SAID CORE BY SAID EXCITER COIL IN THE ABSENCE OF NEARBY METAL OBJECTS INDUCES SUBSTANTIALLY EQUAL MAGNITUDES OF VOLTAGES IN SAID TWO PICK-UP COILS, AND MEANS CONNECTING SAID PICK-UP COILS IN PHASE OPPOSING RELATIONSHIP.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |