US3250894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for monitoring short circuits in electric arc welding
Assignee: Union Carbide Corp
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Filing: 1963-03-22
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Granted: 1966-05-10
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Expires: 1983-03-22
Abstract
No abstract record available.
Inventors
- 👤 August F Manz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:56
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/09; B23K9/091
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
120 words
A METHOD FOR DERIVING A SIGNAL FROM A SHORT CIRCUITING CONSUMABLE ELECTRODE ARC WELDING CYCLE WHICH COMPRISES PERMITTING CURRENT TO FLOW IN A MONITORING CIRCUIT WHEN THERE IS ANY ARC VOLTAGE WHILE PREVENTING CURRENT FROM FLOWING IN SAID MONITORING CIRCUIT WHEN THERE IS A SHORT CIRCUIT CREATED BY THE PHYSICAL CONTACT OF THE CONSUMABLE ELECTRODE WITH THE WORK, THEREBY MONITORING THE SHORT CIRCUIT CYCLE, DERIVING A SIGNAL FROM SAID MONITORED SHORT CIRCUIT CYCLE, THE MAGNITUDE OF WHICH VARIES AS A FUNCTION OF THE SHORT CIRCUIT DURATION, PROVIDING A TIME BASED REFERENCE THE MAGNITUDE OF SUCH REFERENCE BEING NO GREATER THAN ABOUT THE DURATION OF SAID SHORT-CIRCUITING CYCLE, AND COMPARING SAID DERIVED SIGNAL WITH SAID REFERENCE TO PRODUCE AN OUTPUT SIGNAL.
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) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |