US3196241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction welding of tubing from hot strip
Assignee: Republic Steel Corp
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Filing: 1962-11-08
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Granted: 1965-07-20
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Expires: 1982-11-08
Abstract
No abstract record available.
Inventors
- 👤 Norbert E Foxx
- 👤 Thomas O Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:43
CPC Classifications
B; B23; B23K; B23K13/00; B23K13/01; B23K13/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
IN APPARATUS FOR INDUCTION HEATING FOR LONGITUDINAL SEAM WELDING OF TUBING OF CONDUCTIVE MATERIAL, THE COMBINATION WITH MEANS FOR FORMING A TUBE BLANK WITH THE TUBE WALL EXTENDING ABOUT THE SPACE WITHIN THE TUBE AND WITH THE EDGE PORTIONS OF THE WALL TO BE WELDED IN ADJACENT BUT SPACED RELATION ALONG THE LENGTH OF THE BLANK, AND MEANS PROVIDING A MAGNETIC FLUX CIRCUIT HAVING A MAIN PORTION EXTERIOR TO SAID TUBE WALL AND AN INNER PORTION DISPOSED WITHIN SAID SPACE DEFINED BY SAID TUBE WALL, A MAGNETIC FLUX BARRIER HAVING AT LEAST THE EDGE PORTION THEREOF DISPOSED ADJACENT TO THE SPACE DEFINED BETWEEN SAID SPACED EDGE PORTIONS OF SAID TUBE WALL SO THAT SAID MAGNETIC CIRCUIT SUBSTANTIALLY IS DETERMINED BY SAID MAIN PORTION THEREOF AND BY SAID INNER PORTION THEREOF, SAID EDGE PORTIONS OF SAID TUBE BLANK BEING DISPOSED IN THE PATH OF THE FLUX BETWEEN SAID MAIN PORTIN OF SAID CIRCUIT AND SAID INNER PORTION THEREOF, AND MEANS FOR VARYING THE MAGNETIC FLUX IN SAID CIRCUIT TO EFFECT INDUCTION HEATING OF SAID EDGE PORTIONS OF SAID TUBE WALL.
Claim 2
Dependent Claim
179 words
IN APPARATUS FOR INDUCTION HEATING FOR LONGITUDINAL SEAM WELDING OF TUBING OF CONDUCTIVE MATERIAL, THE COMBINATION WITH MEANS FOR FORMING A TUBE BLANK WITH THE TUBE WALL EXTENDING ABOUT THE SPACE WITHIN THE TUBE AND WITH THE EDGE PORTIONS OF THE WALL TO BE WELDED IN ADJACENT BUT SPACED RELATION ALONG THE LENGTH OF THE BLANK, AND MEANS PROVIDING A MAGNETIC FLUX CIRCUIT HAVING A MAIN PORTION EXTERIOR TO SAID TUBE WALL AND AN INNER PORTION DISPOSED WITHIN SAID SPACE DEFINED BY SAID TUBE WALL, A MAGNETIC FLUX BARRIER HAVING AT LEAST THE EDGE PORTION THEREOF DISPOSED ADJACENT TO THE SPACE DEFINED BETWEEN SAID SPACED EDGE PORTIONS OF SAID TUBE WALL SO THAT SAID MAGNETIC CIRCUIT SUBSTANTIALLY IS DETERMINED BY SAID MAIN PORTION THEREOF AND BY SAID INNER PORTION THEREOF, SAID EDGE PORTIONS OF SAID TUBE BLANK BEING DISPOSED IN THE PATH OF THE FLUX BETWEEN SAID MAIN PORTIN OF SAID CIRCUIT AND SAID INNER PORTION THEREOF, AND MEANS FOR VARYING THE MAGNETIC FLUX IN SAID CIRCUIT TO EFFECT INDUCTION HEATING OF SAID EDGE PORTIONS OF SAID TUBE WALL.
References Cited (Backward Citations)
US2762892A
Cited
US3038055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-19 | 1969-01-18 | 1969-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-19 | 1973-01-18 | 1973-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-19 | 1977-01-18 | 1977-07-20 | $7700.00 | Window Closed / Lapsed |