US3824366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for annealing the weld bead of a welded metallic tube
Assignee: Vallourec Usines a Tubes de Lorraine Escaut SA
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Filing: 1973-10-11
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Granted: 1974-07-16
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Expires: 1993-10-11
Abstract
Abstract An apparatus for treating continuously welded metallic tubes comprises a series of longitudinal inductors mounted on movable carriages which are adapted to be pivotal co-axially with respect to the tube in response to the angular position of the weld bead formed on the tube so that each of the inductors remains centered on this weld bead.
Inventors
- 👤 A Garnier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:04
CPC Classifications
B; B23; B23Q; B23Q35/00; B23Q35/04; B23Q35/08; B23Q35/12; B23Q35/127; B23Q35/13; B21; B21C; B21C37/00; B21C37/06; B21C37/08; B21C37/0807; B21C37/0811; B21C51/00; C; C21; C21D; C21D9/00; C21D9/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
164 words
An annealing apparatus for annealing the weld bead of welded metallic tube which is continuously travelling along a given axis from a welding station, comprising: a plurality of longitudinally extending inductors arranged in series relationship along said axis, each inductor being supported by a movable carriage rotatably mounted on a fixed support for angular displacement around said axis, the arrangement being such that each inductor is adapted to be disposed over the center of the weld bead of a welded tube travelling along said axis, means for supplying AC electric power to each inductor, actuating means for controlling angular displacement of each carriage about said axis, a pair of temperature sensing devices arranged on each carriage for measuring the temperature on either side of the approaching part of the weld bead overwhich the inductor may be disposed, and Control means for comparing the measurements effected by said pair of temperature sensing devices and for operating said actuating means until the measurements are substantially equal.
Claim 2
Dependent Claim
164 words
An annealing apparatus for annealing the weld bead of welded metallic tube which is continuously travelling along a given axis from a welding station, comprising: a plurality of longitudinally extending inductors arranged in series relationship along said axis, each inductor being supported by a movable carriage rotatably mounted on a fixed support for angular displacement around said axis, the arrangement being such that each inductor is adapted to be disposed over the center of the weld bead of a welded tube travelling along said axis, means for supplying AC electric power to each inductor, actuating means for controlling angular displacement of each carriage about said axis, a pair of temperature sensing devices arranged on each carriage for measuring the temperature on either side of the approaching part of the weld bead overwhich the inductor may be disposed, and Control means for comparing the measurements effected by said pair of temperature sensing devices and for operating said actuating means until the measurements are substantially equal.
Claim 3
Dependent Claim
92 words
An annealing apparatus according to claim 1, wherein said means for supplying AC electric power to each inductor comprise: an AC power generator connected to the inductor, a temperature sensing means adapted to measure the temperature of the central portion of the approaching weld bead part of a continuously travelling welded tube overwhich the inductor may be disposed, and control device responsive to the measurement effected by the temperature sensing means and adapted to control the AC power delivered by said generator to the inductor predetermined as a function of said measurement.
Claim 4
Dependent Claim
25 words
An annealing apparatus according to claim 1, in which said actuating means comprise an electric motor connected to said carriage by a gear transmitting mechanism.
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) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |