US3838243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for controlling arc in gas shield arc welding
Assignee: National Institute for Materials Science
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Filing: 1972-12-29
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Granted: 1974-09-24
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Expires: 1992-12-29
Abstract
Abstract In a gas shield arc welding, a stream of a control gas is blown against the end of an electrode generating arc to deflect the arc in the direction of the control gas jet stream. An arc-generating position of a joint to be welded is controlled by changing the momentum and/or direction of the control gas jet stream.
Inventors
- 👤 M Inagaki
- 👤 A Okada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:33
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/16; B23K9/167; B23K9/24; B23K9/28; B23K9/30
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
82 words
A method of controlling the direction of an arc deflecting from the axial direction of an electrode in inert or carbon dioxide gas shielded electric arc welding, which comprises causing a control gas jet stream to flow past the end of an electrode of a welding torch such that the axial extension of the control gas jet stream intersects the axis of the electrode only at the end of the electrode, and varying the flow rate of the control gas jet stream.
Claim 2
Independent Claim
82 words
A method of controlling the direction of an arc deflecting from the axial direction of an electrode in inert or carbon dioxide gas shielded electric arc welding, which comprises causing a control gas jet stream to flow past the end of an electrode of a welding torch such that the axial extension of the control gas jet stream intersects the axis of the electrode only at the end of the electrode, and varying the flow rate of the control gas jet stream.
Claim 3
Dependent Claim
18 words
The method of claim 1 wherein the arc is vibrated by causing the control gas to flow intermittently.
Claim 4
Dependent Claim
31 words
The method of claim 1 wherein the direction of the arc deflecting from the axial direction of the electrode is controlled by changing the direction of the control gas jet stream.
Claim 5
Dependent Claim
32 words
The method of claim 1 wherein the arc is rotated about the electrode as a center by changing the direction of the control gas jet stream about the electrode as a center.
Claim 6
Dependent Claim
15 words
The method of claim 1 wherein an inert gas is used as the control gas.
Claim 7
Dependent Claim
25 words
The method of claim 1 wherein the flow rate of the control gas jet stream is higher than the flow rate of the shield gas.
Claim 8
Dependent Claim
77 words
A welding apparatus for use in gas shield arc welding which comprises an electrode, a shield gas nozzle surrounding the electrode and at least one control gas nozzle located such that the axial extension of the control gas nozzle intersects the axis of the electrode only at the end of the electrode, thus deflecting the arc from the axial direction of the electrode by the jet stream of the control gas issued from the control gas nozzle.
Claim 9
Dependent Claim
77 words
A welding apparatus for use in gas shield arc welding which comprises an electrode, a shield gas nozzle surrounding the electrode and at least one control gas nozzle located such that the axial extension of the control gas nozzle intersects the axis of the electrode only at the end of the electrode, thus deflecting the arc from the axial direction of the electrode by the jet stream of the control gas issued from the control gas nozzle.
Claim 10
Dependent Claim
22 words
The welding apparatus of claim 7 wherein two control gas nozzles are provided symmetrically to each other with respect to the electrode.
Claim 11
Dependent Claim
23 words
The welding apparatus of claim 7, which further includes a mechanism for rotating the control gas nozzle about the electrode as a center.
Claim 12
Dependent Claim
19 words
The welding apparatus of claim 7 which further includes a means for causing the control gas to flow intermittently.
References Cited (Backward Citations)
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US3324278A
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US3534388A
Cited
US3632952A
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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) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |