US3141952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic seam follower
Assignee: RTX Corp
•
Filing: 1961-02-01
•
Granted: 1964-07-21
•
Expires: 1981-02-01
Abstract
No abstract record available.
Inventors
- 👤 Richard J Preston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:17
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/9006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
APPARATUS COMPRISING A CORE HAVING AT LEAST TWO POLE PIECES WITH MAJOR VERTICAL AXIS, MEANS ENERGIZED BY A SOURCE OF ALTERNATING VOLTAGE FOR GENERATING AN ALTERNATING MAGNETIC FLUX BETWEEN THE ENDS OF SAID POLE PIECES, MEANS FOR POSITIONING THE ENDS OF SAID POLE PIECES ADJACENT THE SURFACE OF A METALLIC WORKPIECE TO THEREBY DIRECT SAID MAGNETIC FLUX THROUGH A PORTION OF SAID WORK PIECE, AND A SINGLE PICKUP COIL ELECTRICALLY INSULATED FROM SAID CORE AND POSITIONED ADJACENT SAID WORKPIECE SUBSTANTIALLY BETWEEN SAID POLE PIECE IN A PLANE PASSING THROUGH THE MAJOR AXES OF BOTH POLE PIECES FOR SENSING FLUX INTENSITY VARIATIONS OCCURRING IN THE FLUX FIELD PATTERN ADJACENT SAID WORKPIECE DUE TO DISCONTINUTIES IN SAID WORKPIECE.
Claim 2
Dependent Claim
116 words
APPARATUS COMPRISING A CORE HAVING AT LEAST TWO POLE PIECES WITH MAJOR VERTICAL AXIS, MEANS ENERGIZED BY A SOURCE OF ALTERNATING VOLTAGE FOR GENERATING AN ALTERNATING MAGNETIC FLUX BETWEEN THE ENDS OF SAID POLE PIECES, MEANS FOR POSITIONING THE ENDS OF SAID POLE PIECES ADJACENT THE SURFACE OF A METALLIC WORKPIECE TO THEREBY DIRECT SAID MAGNETIC FLUX THROUGH A PORTION OF SAID WORK PIECE, AND A SINGLE PICKUP COIL ELECTRICALLY INSULATED FROM SAID CORE AND POSITIONED ADJACENT SAID WORKPIECE SUBSTANTIALLY BETWEEN SAID POLE PIECE IN A PLANE PASSING THROUGH THE MAJOR AXES OF BOTH POLE PIECES FOR SENSING FLUX INTENSITY VARIATIONS OCCURRING IN THE FLUX FIELD PATTERN ADJACENT SAID WORKPIECE DUE TO DISCONTINUTIES IN SAID WORKPIECE.
References Cited (Backward Citations)
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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) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |