US3610867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrogas welding
Assignee: Welding Institute England
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Filing: 1970-02-09
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Granted: 1971-10-05
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Expires: 1990-02-09
Abstract
Abstract In a method of welding by melting a consumable electrode in a vertical gap between two joint faces, the weld pool being confined by shoes on each side of the gap, a boxlike gas port having an open lower end is placed against the joint face or faces requiring shielding and a shielding gas is passed through the port and is discharged from the open lower end, which extends across the whole width of the joint face. The port may be consumable or may be hoisted as the weld progresses. The consumable electrode or electrodes may be directed towards the joint face or towards opposite joint faces respectively.
Inventors
- 👤 Peter Morley Bartle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:13
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/038
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
158 words
A method of welding together workpieces by arranging that a gap between the faces to be joined is substantially vertical, melting a consumable electrode to form a weld pool in the gap and confining the weld pool by means of shoes bridging the workpieces at each end of the gap, the weld being formed progressively from bottom to top of the gap, comprising the steps of: placing against at least one of the faces to be joined a gasguiding means, said gas-guiding means extending from side to side of said workpiece face and being open at its lower end across substantially the whole width of said workpiece face; and passing shielding gas through said guiding means and releasing it through said open lower end, whereby above said open lower end said workpiece face is covered by said gasguiding means and between said open lower end and the weld pool the workpiece face is shielded by said released gas.
Claim 2
Independent Claim
158 words
A method of welding together workpieces by arranging that a gap between the faces to be joined is substantially vertical, melting a consumable electrode to form a weld pool in the gap and confining the weld pool by means of shoes bridging the workpieces at each end of the gap, the weld being formed progressively from bottom to top of the gap, comprising the steps of: placing against at least one of the faces to be joined a gasguiding means, said gas-guiding means extending from side to side of said workpiece face and being open at its lower end across substantially the whole width of said workpiece face; and passing shielding gas through said guiding means and releasing it through said open lower end, whereby above said open lower end said workpiece face is covered by said gasguiding means and between said open lower end and the weld pool the workpiece face is shielded by said released gas.
Claim 3
Dependent Claim
35 words
A method as defined in claim 1, comprising directing the tip of said consumable electrode fed into the gap towards the face of one of said workpieces below said gas-guiding means against said workpiece face.
Claim 4
Dependent Claim
26 words
A method as defined in claim 1, comprising feeding two consumable electrodes into said gap and directing the tips of said electrodes towards opposite workpiece faces.
Claim 5
Dependent Claim
61 words
A method as defined in claim 1, in which a gas-guiding means is placed against each of the faces to be joined and gas is released through the open lower face of each gas-guiding means, the method comprising feeding two consumable electrodes into said gap and directing the tips of said two electrodes towards opposite workpiece faces below said gas-guiding means.
Claim 6
Dependent Claim
36 words
A method as defined in claim 2, comprising feeding said consumable electrode through a substantially vertical guide within said gap and deflecting the tip of said consumable electrode emerging from said guide towards said workpiece face.
Claim 7
Dependent Claim
21 words
A method as defined in claim 5, in which the angle or deflection is between 5* and 25* from the vertical.
Claim 8
Dependent Claim
21 words
A method as defined in claim 6, in whiCh the angle of deflection is between 7* and 12* from the vertical.
Claim 9
Dependent Claim
23 words
A method as defined in claim 1, in which said gas-guiding means is fixed in place and is consumed as the weld progresses.
Claim 10
Dependent Claim
53 words
A method as defined in claim 1, comprising, prior to the commencement of the weld, placing said workpiece ends to be joined over a starter plate resting in a tray of material of lower thermal conductivity than said starter plate, whereby the starter plate is melted at the beginning of the welding operation.
Claim 11
Dependent Claim
54 words
A method as defined in claim 9, comprising, prior to the commencement of the weld, placing spaces between said workpiece faces and said starter tray, whereby the weld pool is deeper when it reaches the lower surface of the workpieces and the heat sink effect of the workpieces on the weld pool is delayed.
Claim 12
Dependent Claim
88 words
Apparatus for welding together workpieces positioned with a vertical gap between the faces to be joined, comprising: shoes for bridging said gap on each side of said workpieces to confine a weld pool between the workpiece faces; a hollow boxlike gas-guiding means for placing against at least one of the faces to be joined, each gas-guiding means having a gas-inlet tube at its upper end and having an open lower end constituting a gas outlet; and an electrode guide for guiding a consumable electrode wire into the gap.
Claim 13
Dependent Claim
88 words
Apparatus for welding together workpieces positioned with a vertical gap between the faces to be joined, comprising: shoes for bridging said gap on each side of said workpieces to confine a weld pool between the workpiece faces; a hollow boxlike gas-guiding means for placing against at least one of the faces to be joined, each gas-guiding means having a gas-inlet tube at its upper end and having an open lower end constituting a gas outlet; and an electrode guide for guiding a consumable electrode wire into the gap.
Claim 14
Dependent Claim
38 words
Apparatus as defined in claim 11, in which said gas-guiding means is internally divided into a number of vertical channels and has lateral flanges which, when said workpiece is in place, extend along the sides of the workpiece.
Claim 15
Dependent Claim
62 words
Apparatus as defined in claim 11, in which said gas-guiding means is to be consumed during the welding operation and in which the wall of said gas-guiding means is thicker along the outer vertical portions of said gas-guiding means than in the central region between said outer portions, whereby the lower end of said gas-guiding means burns back to form an arch.
Claim 16
Dependent Claim
27 words
Apparatus as defined in claim 11, wherein said electrode guides terminate in tip portions having inclined exit surfaces for deflecting said electrode wire towards the work faces.
Claim 17
Dependent Claim
28 words
Apparatus as defined in claim 11, in which each shoe is constructed with upper and lower portions, said lower portion having better heat-absorbing properties than said upper portion.
Claim 18
Dependent Claim
30 words
Apparatus as defined in claim 15, in which the top of each shoe is formed of carbon and the bottom of each shoe is of copper and includes cooling channels.
Claim 19
Dependent Claim
31 words
Apparatus as defined in claim 11, including traversing means for imparting to said electrode guides an oscillating transverse movement, whereby arcs from said electrode wires will scan across said workpiece faces.
Claim 20
Independent Claim
200 words
A method of welding together workpieces by arranging that a gap between the faces to be joined is substantially vertical, melting a consumable electrode to form a weld pool in the gap and confining the weld pool by means of shoes bridging the workpieces at each end of the gap, the weld being formed progressively from bottom to top of the gap, the method comprising the steps of: fixing against each of the faces to be joined a consumable boxlike gas-guiding means, each gas-guiding means extending from side to side of said workpiece face against which it is fixed and being open at its lower end across substantially the whole width of the workpiece face; passing a shielding gas through each gas-guiding means and discharging it through said open lower end, whereby each workpiece face is covered above its lower end by the gas-guiding means and is shielded between said lower end of the gas-guiding means and said weld pool by said discharged shielding gas; feeding two consumable electrode wires into said gap; directing the tips of said two electrode wires towards opposite workpiece faces below said guiding means; and striking arcs from said tips towards said opposite workpiece faces.
Claim 21
Independent Claim
200 words
A method of welding together workpieces by arranging that a gap between the faces to be joined is substantially vertical, melting a consumable electrode to form a weld pool in the gap and confining the weld pool by means of shoes bridging the workpieces at each end of the gap, the weld being formed progressively from bottom to top of the gap, the method comprising the steps of: fixing against each of the faces to be joined a consumable boxlike gas-guiding means, each gas-guiding means extending from side to side of said workpiece face against which it is fixed and being open at its lower end across substantially the whole width of the workpiece face; passing a shielding gas through each gas-guiding means and discharging it through said open lower end, whereby each workpiece face is covered above its lower end by the gas-guiding means and is shielded between said lower end of the gas-guiding means and said weld pool by said discharged shielding gas; feeding two consumable electrode wires into said gap; directing the tips of said two electrode wires towards opposite workpiece faces below said guiding means; and striking arcs from said tips towards said opposite workpiece faces.
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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |