Patent US3140383A successfully refreshed from Google Patents.
US3140383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spot welder
Assignee: Individual
•
Filing: 1961-08-08
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Granted: 1964-07-07
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Expires: 1981-08-08
Abstract
No abstract record available.
Inventors
- 👤 Frank J Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:47
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/24; B23K11/248
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN AN ELECTRICAL SPOT-WELDER FOR WELDING WORK BETWEEN TWO ELECTRODES CONNECTED WITH A WELDING POWER SOURCE: MEANS FOR INTRODUCING A CONTINUOUS AND STEADY SIGNAL ACROSS SAID WELDING ELECTRODES SO THAT THE AMPLITUDE OF SAID SIGNAL VOLTAGE ACROSS SAID ELECTRODES IS AFFECTED BY THE OHMIC RESISTANCE BETWEEN THE ELECTRODES THROUGH THE WORK; MEANS FOR DIRECTLY MEASURING SAID SIGNAL VOLTAGE ACROSS SAID ELECTRODES FOR OBTAINING A VARYING SIGNAL VOLTAGE AS THE PRESSURE OF SAID ELECTRODES ON SAID WORK INCREASES, AND SWITCHING MEANS RESPONSIVE TO SAID MEASURING MEANS AND OPERATED BY A PREDETERMINED VALUE OF SAID SIGNAL VOLTAGE FOR APPLYING SAID WELDING POWER TO SAID ELECTRODES.
Claim 2
Dependent Claim
103 words
IN AN ELECTRICAL SPOT-WELDER FOR WELDING WORK BETWEEN TWO ELECTRODES CONNECTED WITH A WELDING POWER SOURCE: MEANS FOR INTRODUCING A CONTINUOUS AND STEADY SIGNAL ACROSS SAID WELDING ELECTRODES SO THAT THE AMPLITUDE OF SAID SIGNAL VOLTAGE ACROSS SAID ELECTRODES IS AFFECTED BY THE OHMIC RESISTANCE BETWEEN THE ELECTRODES THROUGH THE WORK; MEANS FOR DIRECTLY MEASURING SAID SIGNAL VOLTAGE ACROSS SAID ELECTRODES FOR OBTAINING A VARYING SIGNAL VOLTAGE AS THE PRESSURE OF SAID ELECTRODES ON SAID WORK INCREASES, AND SWITCHING MEANS RESPONSIVE TO SAID MEASURING MEANS AND OPERATED BY A PREDETERMINED VALUE OF SAID SIGNAL VOLTAGE FOR APPLYING SAID WELDING POWER TO SAID ELECTRODES.
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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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |