US3291960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control appliance for sources of welding current
Assignee: Messer Griesheim GmbH
•
Filing: 1964-12-16
•
Granted: 1966-12-13
•
Expires: 1984-12-16
Abstract
No abstract record available.
Inventors
- 👤 E Folkhard
- 👤 Keller Horst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:57
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/09; B23K9/091; B23K9/10; B23K9/1006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
AN ARRANGEMENT FOR INFLUENCING THE SHORT-CIRCUIT TIME SLOPE OF A WELDING PROCEDURE COMPRISING DIRECT CURRENT WELDING MEANS HAVING A FLAT CHARACTERISTIC INCLUDING CIRCUIT MEANS FOR MAKING A SHORT-CIRCUIT ELECTRIC ARC FOR A MELTABLE ELECTRODE, SAID CIRCUIT INCLUDING A MAIN INDUCTOR, A SECONDARY INDUCTOR CONNECTED IN SERIES TO SAID MAIN INDUCTOR, AN OHMIC RESISTANCE IN A SIDE BRANCH CONNECTED IN PARALLEL TO SAID MAIN INDUCTOR, THE INDUCTANCE OF SAID MAIN INDUCTOR BEING GREATER THAN THAT OF THE SECONDARY INDUCTOR, AND THE RESISTANCE VALUE OF THE PARALLEL OHMIC RESISTANCE BEING GREATER THAN THE RESISTANCE OF THE MAIN INDUCTOR AND THE SECONDARY INDUCTOR.
Claim 2
Dependent Claim
100 words
AN ARRANGEMENT FOR INFLUENCING THE SHORT-CIRCUIT TIME SLOPE OF A WELDING PROCEDURE COMPRISING DIRECT CURRENT WELDING MEANS HAVING A FLAT CHARACTERISTIC INCLUDING CIRCUIT MEANS FOR MAKING A SHORT-CIRCUIT ELECTRIC ARC FOR A MELTABLE ELECTRODE, SAID CIRCUIT INCLUDING A MAIN INDUCTOR, A SECONDARY INDUCTOR CONNECTED IN SERIES TO SAID MAIN INDUCTOR, AN OHMIC RESISTANCE IN A SIDE BRANCH CONNECTED IN PARALLEL TO SAID MAIN INDUCTOR, THE INDUCTANCE OF SAID MAIN INDUCTOR BEING GREATER THAN THAT OF THE SECONDARY INDUCTOR, AND THE RESISTANCE VALUE OF THE PARALLEL OHMIC RESISTANCE BEING GREATER THAN THE RESISTANCE OF THE MAIN INDUCTOR AND THE SECONDARY INDUCTOR.
References Cited (Backward Citations)
US1761855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |