US3102948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric arc welding
Assignee: Individual
•
Filing: 1961-11-08
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Granted: 1963-09-03
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Expires: 1981-11-08
Abstract
No abstract record available.
Inventors
- 👤 William M Mccampbell
- 👤 James C Mccaig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:20
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/007
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
145 words
A METHOD OF ELECTRIC ARC SPOT WELDING BY VARYING THE CURRENT, VOLTAGE, AND LENGTH OF AN ARC STRUCK BETWEEN AN ELECTRODE MEANS AND A METAL WORKPIECE, SAID ELECTRODE MEANS PROVIDING A SOURCE OF FILLER METAL, COMPRISING: (A) PROVIDING A PRESELECTED ARC VOLTAGE AND A PRESELECTED ARC CURRENT AND A PRESELECTED ARC LENGTH TO PREHEAT A FINITE ZONE OF SAID WORKPIECE WHILE DEPOSITING VERY LITTLE METAL FROM SAID ELECTRODE MEANS; (B) INCREASING SAID ARC VOLTAGE AND SAID ARC CURRENT TO A PRESELECTED VALUE AND EXTREMELY SHORTENING SAID ARC LENGTH TO BLOW OUT SUFFICIENT MATERIAL FROM SAID FINITE ZONE TO FORM A RECESS; AND (C) THEN INCREASING SAID ARC LENGTH TO A MEDIUM ARC LENGTH AND HOLDING IT SUBSTANTIALLY CONSTANT WHILE DECREASING SAID ARC VOLTAGE AND SAID ARC CURRENT TO PRESELECTED VALUES FOR A PLURALITY OF SECONDS TO GRADUALLY BUILD UP A MOLTEN PUDDLE WITHIN SAID RECESS.
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) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |