US4447703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for arc welding
Assignee: Westinghouse Electric Corp
•
Filing: 1981-11-13
•
Granted: 1984-05-08
•
Expires: 2001-11-13
Abstract
Abstract An arc welding process is provided with a preheating step in which a consumable wire electrode is heated prior to insertion into the electrode stick-out region. This is accomplished by the circulation of current from a preheating power supply through a segment of the wire. Both gas-metal and gas-tungsten arc welding processes are disclosed, along with apparatus used in these processes.
Inventors
- 👤 Israel Stol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:07
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/10; B23K9/1093
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
126 words
An apparatus for welding a metal workpiece comprising: a first source of electric power connected between a first electrode contact tip and the workpiece; a second source of electric power connected between said first electrode contact tip and a second electrode contact tip, wherein said first and second electrode contact tips are spaced apart by a fixed distance; a consumable electrode slidably disposed between said electrode contact tips, wherein the preheat content of said consumable electrode is controlled by adjusting current flowing through a fixed length of said consumable electrode between said first and second contact tips; and a dielectric element between said electrode contact tips, said dielectric element having an opening through which said consumable electrode passes to prevent lateral movement of said consumable electrode.
Claim 2
Independent Claim
126 words
An apparatus for welding a metal workpiece comprising: a first source of electric power connected between a first electrode contact tip and the workpiece; a second source of electric power connected between said first electrode contact tip and a second electrode contact tip, wherein said first and second electrode contact tips are spaced apart by a fixed distance; a consumable electrode slidably disposed between said electrode contact tips, wherein the preheat content of said consumable electrode is controlled by adjusting current flowing through a fixed length of said consumable electrode between said first and second contact tips; and a dielectric element between said electrode contact tips, said dielectric element having an opening through which said consumable electrode passes to prevent lateral movement of said consumable electrode.
Claim 3
Dependent Claim
23 words
An apparatus for welding a metal workpiece as recited in claim 1, further comprising: means for advancing said consumable electrode toward said workpiece.
References Cited (Backward Citations)
SU323212A1
Cited
US3600549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-08 | 1987-11-07 | 1988-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-08 | 1991-11-07 | 1992-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-08 | 1995-11-07 | 1996-05-08 | $7700.00 | Window Closed / Lapsed |