Patent US3211885A successfully refreshed from Google Patents.
US3211885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spot welder
Assignee: Individual
•
Filing: 1962-06-28
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Granted: 1965-10-12
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Expires: 1982-06-28
Abstract
No abstract record available.
Inventors
- 👤 Martin N Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:44
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/24; B23K11/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A CAPACITIVE DISCHARGE SYSTEM FOR WELDING WIRES OF DIFFERENT RESISTIVITIES COMPRISING A CAPACITOR, MEANS FOR CHARGING SAID CAPACITOR TO A PREDETERMINED VOLTAGE, A WELDING TRANSFORMER COMPRISING A SATURABLE CORE, A PRIMARY WINDING AND A SECOND WINDING, MEANS FOR AT WILL DISCHARGING SAID CAPACITOR ACROSS SAID PRIMARY WINDING AND MEANS CONNECTING A PAIR OF WELDING ELECTRODES ACROSS SAID SECOND WINDING, SAID TRANSFORMER HAVING A SATURATION CHARACTERISTIC SUCH THAT SUBSTANTIALLY THE SAME AMOUNT OF CURRENT IS SUPPLIED TO WIRES OF SUBSTANTIALLY THE SAME DIAMETER, BUT OF DIFFERENT RESISTIVITY, WHEN
Claim 2
Dependent Claim
87 words
A CAPACITIVE DISCHARGE SYSTEM FOR WELDING WIRES OF DIFFERENT RESISTIVITIES COMPRISING A CAPACITOR, MEANS FOR CHARGING SAID CAPACITOR TO A PREDETERMINED VOLTAGE, A WELDING TRANSFORMER COMPRISING A SATURABLE CORE, A PRIMARY WINDING AND A SECOND WINDING, MEANS FOR AT WILL DISCHARGING SAID CAPACITOR ACROSS SAID PRIMARY WINDING AND MEANS CONNECTING A PAIR OF WELDING ELECTRODES ACROSS SAID SECOND WINDING, SAID TRANSFORMER HAVING A SATURATION CHARACTERISTIC SUCH THAT SUBSTANTIALLY THE SAME AMOUNT OF CURRENT IS SUPPLIED TO WIRES OF SUBSTANTIALLY THE SAME DIAMETER, BUT OF DIFFERENT RESISTIVITY, WHEN
References Cited (Backward Citations)
US1108050A
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US1252144A
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US1836615A
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US2184628A
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US2651701A
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US2708219A
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US2760041A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |