US3149221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistance monitor
Assignee: Robotron Corp
•
Filing: 1962-03-07
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Granted: 1964-09-15
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Expires: 1982-03-07
Abstract
No abstract record available.
Inventors
- 👤 Watter Michael
- 👤 Edwin M Callender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:14
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/24; B23K11/248
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN THE RESISTANCE WELDING OF WORKPIECES BY MEANS OF PULSATING WELDING CURRENTS THE METHOD OF MONITORING RESISTANCE PARAMETERS OF A WELDING POSITION COMPRISING: APPLYING SAMPLE ELECTRICAL PULSES ACROSS THE SERIES RESISTANCES OF THE WORKPIECE, WHICH PULSES ARE OF A PREDETERMINED AND CONTROLLED REFERENCE VALUE, SAID VALUE BEING OF AN ELECTRICAL CHARACTERISTIC WHICH IS VARIABLE AS A FUNCTION OF RESISTANCE AND WHICH PULSES FURTHER ARE OF SUCH AMPLITUDE AND DURATION AS TO HAVE A HEATING EFFECT LESS THAN THE MINIMUM HEATING EFFECT REQUIRED FOR FUSION OF THE WORKPIECE MATERIAL;
Claim 2
Dependent Claim
88 words
IN THE RESISTANCE WELDING OF WORKPIECES BY MEANS OF PULSATING WELDING CURRENTS THE METHOD OF MONITORING RESISTANCE PARAMETERS OF A WELDING POSITION COMPRISING: APPLYING SAMPLE ELECTRICAL PULSES ACROSS THE SERIES RESISTANCES OF THE WORKPIECE, WHICH PULSES ARE OF A PREDETERMINED AND CONTROLLED REFERENCE VALUE, SAID VALUE BEING OF AN ELECTRICAL CHARACTERISTIC WHICH IS VARIABLE AS A FUNCTION OF RESISTANCE AND WHICH PULSES FURTHER ARE OF SUCH AMPLITUDE AND DURATION AS TO HAVE A HEATING EFFECT LESS THAN THE MINIMUM HEATING EFFECT REQUIRED FOR FUSION OF THE WORKPIECE MATERIAL;
References Cited (Backward Citations)
US2848595A
Cited
US3068350A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |