Patent US3834002A successfully refreshed from Google Patents.
US3834002A
Expired / Lapsed
US
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Method of manufacturing a composite metal sheathed welding electrode
Assignee: PYROTENOX Ltd
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Filing: 1972-09-08
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Granted: 1974-09-10
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Expires: 1992-09-08
Abstract
Abstract A composite metal sheathed welding electrode is manufactured as a continuous operation by drawing a preformed metallic tube containing a particulate material consisting of or comprising a deoxidizing agent vertically downward through a drawing die. The die is of such a form that the tube is reduced in diameter during its passage through the die and powder or granules are fed into a part of the tube in advance of the die at a rate to maintain the said part substantially full of powder or granules. The height of the column of particles above the die is at least sufficient to avoid ''''push-back'''' of particles. The overall diameter of the filled tube is then further reduced to compact further the particulate core. The preformed tube may be of a composite form comprising inner and outer parts, the outer part being of a different metallic material from that of the inner part.
Inventors
- 👤 A Sissons
- 👤 M Cairns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:16
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/32; B23K35/327; B23K35/02; B23K35/0255; B23K35/0261; B23K35/0272; B23K35/30; B23K35/302; B23K35/40; B23K35/406
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
179 words
A method of manufacturing a composite metal sheathed welding electrode as a continuous operation which comprises drawing a preformed metallic tube containing a material selected from the group of materials consisting of a deoxidizing agent and a mixture of at least two materials including a deoxidizing agent, which material is in particulate form and is suitable for constituting the core of a composiTe metal sheathed welding electrode, substantially vertically downward through a drawing die of such a form that the tube is reduced in diameter during its passage through the die and feeding powder or granules into a part of the tube in advance of the die at a rate to maintain the said part sustantially full of particles, the height of the column of particles above the die being at least sufficient to avoid ''''push-back'''' of particles, and subsequently further reducing the overall diameter of the filled tube so formed to compact further the particulate core and to reduce the filled tube to an overall diameter rendering it suitable for use as a composite metal sheathed welding electrode.
Claim 2
Independent Claim
179 words
A method of manufacturing a composite metal sheathed welding electrode as a continuous operation which comprises drawing a preformed metallic tube containing a material selected from the group of materials consisting of a deoxidizing agent and a mixture of at least two materials including a deoxidizing agent, which material is in particulate form and is suitable for constituting the core of a composiTe metal sheathed welding electrode, substantially vertically downward through a drawing die of such a form that the tube is reduced in diameter during its passage through the die and feeding powder or granules into a part of the tube in advance of the die at a rate to maintain the said part sustantially full of particles, the height of the column of particles above the die being at least sufficient to avoid ''''push-back'''' of particles, and subsequently further reducing the overall diameter of the filled tube so formed to compact further the particulate core and to reduce the filled tube to an overall diameter rendering it suitable for use as a composite metal sheathed welding electrode.
Claim 3
Dependent Claim
36 words
A method as claimed in claim 1, wherein the preformed tube is of a composite form comprising inner and outer parts, the outer part being of a different metallic material from that of the inner part.
Claim 4
Dependent Claim
92 words
A method as claimed in claim 1, wherein before the filled tube is finally reduced to an overall diameter to render it suitable for use as a composite metal sheathed welding electrode a second tube of a metallic material different from that of the first tube is drawn over the filled tube and is reduced in diameter to grip the filled tube and the overall diameter of the filled composite tube so formed is further reduced to an overall diameter rendering it suitable for use as a composite metal sheathed welding electrode.
Claim 5
Dependent Claim
30 words
A method as claimed in claim 1, wherein compaction is effected by subjecting the tube to an operation selected from the group of operations consisting of agitation, vibration and oscillation.
Claim 6
Dependent Claim
29 words
A method as claimed in claim 1, wherein at least one rod of a metallic material is positioned in the tube before it is filled with the particulate material.
Claim 7
Dependent Claim
31 words
A method as claimed in claim 1, wherein the overall diameter of the particulate tube is reduced further by drawing the filled tube through a series of dies of decreasing size.
Claim 8
Dependent Claim
18 words
A method as claimed in claim 6, wherein the filled tube is annealed between passes through the dies.
Claim 9
Dependent Claim
28 words
A method as claimed in claim 1, wherein the overall diameter of the filled tube is reduced further by drawing the filled tube through a series of rolls.
Claim 10
Dependent Claim
16 words
A method as claimed in claim 1, wherein the particulate material includes slag-forming and alloying additives.
Claim 11
Dependent Claim
25 words
A method as claimed in claim 1, wherein the core material comprises particulate aluminium and a particulate fluxing agent and the tube is of copper.
Claim 12
Dependent Claim
38 words
A method as claimed in claim 1, wherein the core material comprises particulate aluminium and a particulate fluxing agent and the tube is of composite form comprising an inner part of aluminium and an outer part of copper.
Claim 13
Dependent Claim
27 words
A method as claimed in claim 1, wherein the core material comprises a particulare refractory carbide and a particulate fluxing agent and the tube is of steel.
Claim 14
Dependent Claim
36 words
A method as claimed in claim 1, wherein the core material comprises a particulate refractory carbide and a particulate fluxing agent, a wire of nickel is embedded in the core, and the tube is of steel.
References Cited (Backward Citations)
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US3122434A
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US3365565A
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US3533152A
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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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |