US3715561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-consumable electrode configuration having increased arc starting capabilities
Assignee: Studsvik Energiteknik AB
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Filing: 1970-06-15
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Granted: 1973-02-06
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Expires: 1990-06-15
Abstract
Abstract There is disclosed a non-consumable electrode for electric arc welding in a highly controlled inert atmosphere. In order to improve the initiating characteristics the rod-shaped electrode has at least one longitudinal edge starting from the end of the rod facing the arc, the edge angle of at least one of said edges being acute.
Inventors
- 👤 A Hammarlind
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:51
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/02; B23K35/0205; B23K9/00; B23K9/007
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
207 words
In an inert gas arc welding apparatus including a sealed welding chamber filled with an inert gas, the workpiecE to be welded being arranged in said chamber and connected to one terminal of a voltage source, an electrode holder arranged in said chamber and connected to the other terminal of the voltage source, and a non-consumable electrode mounted in said electrode holder so that the electrode does not touch the workpiece, the improvement wherein the electrode has the shape of a rod with an elongated body, said body having a first end portion having an extreme end facing the workpiece and a second end portion attached to the electrode holder so that an arc can be struck between the extreme end of said first end portion and the workpiece, said first end portion having at least one edge formed between two contiguous longitudinally extending surfaces formed by a portion of said rod elongated body and starting from said extreme end and extending along the length of the first end portion, the edge angle formed by the two surfaces diverging from the edge being essentially less than 90*, each cross-section of said first end portion having the shape of an equilateral triangle, whereby the initiating characteristics are improved.
Claim 2
Dependent Claim
207 words
In an inert gas arc welding apparatus including a sealed welding chamber filled with an inert gas, the workpiecE to be welded being arranged in said chamber and connected to one terminal of a voltage source, an electrode holder arranged in said chamber and connected to the other terminal of the voltage source, and a non-consumable electrode mounted in said electrode holder so that the electrode does not touch the workpiece, the improvement wherein the electrode has the shape of a rod with an elongated body, said body having a first end portion having an extreme end facing the workpiece and a second end portion attached to the electrode holder so that an arc can be struck between the extreme end of said first end portion and the workpiece, said first end portion having at least one edge formed between two contiguous longitudinally extending surfaces formed by a portion of said rod elongated body and starting from said extreme end and extending along the length of the first end portion, the edge angle formed by the two surfaces diverging from the edge being essentially less than 90*, each cross-section of said first end portion having the shape of an equilateral triangle, whereby the initiating characteristics are improved.
Claim 3
Dependent Claim
207 words
In an inert gas arc welding apparatus including a sealed welding chamber filled with an inert gas, the workpiecE to be welded being arranged in said chamber and connected to one terminal of a voltage source, an electrode holder arranged in said chamber and connected to the other terminal of the voltage source, and a non-consumable electrode mounted in said electrode holder so that the electrode does not touch the workpiece, the improvement wherein the electrode has the shape of a rod with an elongated body, said body having a first end portion having an extreme end facing the workpiece and a second end portion attached to the electrode holder so that an arc can be struck between the extreme end of said first end portion and the workpiece, said first end portion having at least one edge formed between two contiguous longitudinally extending surfaces formed by a portion of said rod elongated body and starting from said extreme end and extending along the length of the first end portion, the edge angle formed by the two surfaces diverging from the edge being essentially less than 90*, each cross-section of said first end portion having the shape of an equilateral triangle, whereby the initiating characteristics are improved.
Claim 4
Dependent Claim
207 words
In an inert gas arc welding apparatus including a sealed welding chamber filled with an inert gas, the workpiecE to be welded being arranged in said chamber and connected to one terminal of a voltage source, an electrode holder arranged in said chamber and connected to the other terminal of the voltage source, and a non-consumable electrode mounted in said electrode holder so that the electrode does not touch the workpiece, the improvement wherein the electrode has the shape of a rod with an elongated body, said body having a first end portion having an extreme end facing the workpiece and a second end portion attached to the electrode holder so that an arc can be struck between the extreme end of said first end portion and the workpiece, said first end portion having at least one edge formed between two contiguous longitudinally extending surfaces formed by a portion of said rod elongated body and starting from said extreme end and extending along the length of the first end portion, the edge angle formed by the two surfaces diverging from the edge being essentially less than 90*, each cross-section of said first end portion having the shape of an equilateral triangle, whereby the initiating characteristics are improved.
Claim 5
Dependent Claim
214 words
In an inert gas arc welding apparatus including a sealed welding chamber filled with an inert gas, the workpiece to be welded being arranged in said chamber and connected to one terminal of a voltage source, an electrode holder arranged in said chamber and connected to the other terminal of the voltage source, and a non-consumable electrode mounted in said electrode holder so that the electrode does not touch the workpiece, the improvement wherein the electrode has the shape of a rod with an elongated body, said body having a first end portion having an extreme end facing the workpiece and a second end portion attached to the electrode holder so that an arc can be struck between the extreme end of said first end portion and the workpiece, said first end portion having at least one edge formed between two contiguous longitudinally extending surfaces formed by a portion of said rod elongated body and starting from said extreme end and extending along the length of the first end portion, the edge angle formed by the two surfaces diverging from the edge being essentially less than 90*, each cross-section of said first end portion having the shape of a regular figure having four angles connected by concave lines, whereby the initiating characteristics are improved.
Claim 6
Dependent Claim
214 words
In an inert gas arc welding apparatus including a sealed welding chamber filled with an inert gas, the workpiece to be welded being arranged in said chamber and connected to one terminal of a voltage source, an electrode holder arranged in said chamber and connected to the other terminal of the voltage source, and a non-consumable electrode mounted in said electrode holder so that the electrode does not touch the workpiece, the improvement wherein the electrode has the shape of a rod with an elongated body, said body having a first end portion having an extreme end facing the workpiece and a second end portion attached to the electrode holder so that an arc can be struck between the extreme end of said first end portion and the workpiece, said first end portion having at least one edge formed between two contiguous longitudinally extending surfaces formed by a portion of said rod elongated body and starting from said extreme end and extending along the length of the first end portion, the edge angle formed by the two surfaces diverging from the edge being essentially less than 90*, each cross-section of said first end portion having the shape of a regular figure having four angles connected by concave lines, whereby the initiating characteristics are improved.
Claim 7
Dependent Claim
23 words
The apparatus of claim 2 wherein the at least one edge angle formed by two surfaces diverging from the edge is about 60*.
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) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |