Patent US3781510A successfully refreshed from Google Patents.
US3781510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for welding interrupted seams
Assignee: SCHIFFBAU ING BUERO VEB
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Filing: 1971-07-09
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Granted: 1973-12-25
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Expires: 1991-07-09
Abstract
Abstract Welding apparatus is traversed along a weld gap to be welded, from one interruption of the required weld seam to another such interruption. Incident thereto, the apparatus is manipulated so that near the first interruption the weld arc is in trailing position but near the second interruption it is in leading position relative to the welding apparatus.
Inventors
- 👤 U Ploetz
- 👤 W Thiesen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:36
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/025; B23K9/0256
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
208 words
An arc welder for welding a workpiece with a seam to be welded extending in a single plane and abutted at each end of the seam by first and second elements each extending in a respective plane intersecting transversely the plane of the seam, comprising an electrode having a tip from which an arc is established, a track generally extending along the length of the seam, means mounting the welder in engagement with the track for movement along the track, and means moving said welder along said track to weld said seam from said first element to said second element while maintaining the electrode tip at a substantially constant distance from the seam, said means for moving comprising, means positioning said welder in a first position to direct said electrode at an acute angle to the plane of the seam at said first end element to initiate said weld, means moving said welder while welding from said first position through a second position in which said electrode is directed normal to the plane of the seam, and means positioning said welder in a third position to direct said electrode at an acute angle to the plane of the seam at said second end element to finish the weld.
Claim 2
Dependent Claim
208 words
An arc welder for welding a workpiece with a seam to be welded extending in a single plane and abutted at each end of the seam by first and second elements each extending in a respective plane intersecting transversely the plane of the seam, comprising an electrode having a tip from which an arc is established, a track generally extending along the length of the seam, means mounting the welder in engagement with the track for movement along the track, and means moving said welder along said track to weld said seam from said first element to said second element while maintaining the electrode tip at a substantially constant distance from the seam, said means for moving comprising, means positioning said welder in a first position to direct said electrode at an acute angle to the plane of the seam at said first end element to initiate said weld, means moving said welder while welding from said first position through a second position in which said electrode is directed normal to the plane of the seam, and means positioning said welder in a third position to direct said electrode at an acute angle to the plane of the seam at said second end element to finish the weld.
Claim 3
Dependent Claim
34 words
An arc welder according to claim 1, in which the mounting means is displaceable in directions toward and away from the tip for maintaining the tip at said substantially constant distance from the seam.
Claim 4
Dependent Claim
31 words
An arc welder according to claim 1, in which the positioning means comprises means for angularly displacing the electrode relative to the mounting means to effect said changing of the orientation.
Claim 5
Dependent Claim
22 words
An arc welder according to claim 1, in which said track is curved in segments thereof closest said first and second elements.
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |