US3588466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulsed power welding system with suppressed pulse start
Assignee: Airco Inc
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Filing: 1969-01-16
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Granted: 1971-06-28
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Expires: 1989-01-16
Abstract
Abstract A PULSED POWER ARC, WELDING SYSTEM HAVING BACKGROUND POWER MEANS FOR MAINTGAINING A STABLE ARC COMBINED WITH COMPLEMENTARY PULSING POWER MEANS INCLUDING SILICON CONTROLLED RECTIFIER CIRCUITRY FOR CONTROLLING FLOW OF INDIVIDUAL CURRENT PULSES TO THE ARC FOR PULSED SPRAY ARC WELDING, THE PULSING POWER BEING EXCESSIVE FOR INITIAL ARC STARTING ON SHORT CIRCUIT, A SENSOR FOR DETECTING BACKGROUND STARTING CURRENT, AND TIME-DELAY MEANS RESPONSIVE TO THE SENSOR FOR APPLYING ONLY AFTER PREDETERMINED DELAY TRIGGERING BIAS IN ONE OR MORE STAGES TO THE RECTIFIER CIRCUITRY FOR STARTING THE PULSING CURRENT.
Inventors
- 👤 Evans H Daggett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:25
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/09; B23K9/091
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |