US3136880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condenser discharge stud welding apparatus
Assignee: Gregory Industries Inc
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Filing: 1961-03-30
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Granted: 1964-06-09
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Expires: 1981-03-30
Abstract
No abstract record available.
Inventors
- 👤 Paul A Glorioso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:50
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/06; B23K9/067; B23K9/0672; B23K9/0678; B23K9/20; B23K9/201
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A STUD WELDING DEVICE, COMPRISING, A STUD HOLDING AND RETRACTING MECHANISM ADAPTED TO SEQUENTIALLY POSITION A STUD AGAINST A SURFACE TO WHICH IT IS TO BE WELDED, TO THEREAFTER RETRACT THE STUD TO PRODUCE A PREDETERMINED GAP, AND FINALLY TO RETURN THE STUD TO THE WELD POSITION, A PILOT ARC CIRCUIT FOR CONNECTING IN SERIES A STUD HELD BY SAID MECHANISM WITH SAID SURFACE, SAID CIRCUIT ADAPTED TO PROVIDE A LOW CURRENT WHICH WILL PRODUCE A PILOT ARC ACROSS SAID GAP AS THE STUD IS RETRACTED, A SERIES INDUCTIVE CAPACITIVE CIRCUIT INCLUDING A CAPACITOR CONNECTED IN SERIES WITH AN INDUCTANCE, AND CONTROL MEANS ADAPTED TO DISCHARGE SAID INDUCTIVE CAPACITIVE CIRCUIT THROUGH SAID GAP UPON SAID PILOT ARC AND IN TIMED RELATIONSHIP WITH SAID RETRACTING, HOLDING AND RETURN MECHANISM MOVEMENT.
Claim 2
Dependent Claim
129 words
A STUD WELDING DEVICE, COMPRISING, A STUD HOLDING AND RETRACTING MECHANISM ADAPTED TO SEQUENTIALLY POSITION A STUD AGAINST A SURFACE TO WHICH IT IS TO BE WELDED, TO THEREAFTER RETRACT THE STUD TO PRODUCE A PREDETERMINED GAP, AND FINALLY TO RETURN THE STUD TO THE WELD POSITION, A PILOT ARC CIRCUIT FOR CONNECTING IN SERIES A STUD HELD BY SAID MECHANISM WITH SAID SURFACE, SAID CIRCUIT ADAPTED TO PROVIDE A LOW CURRENT WHICH WILL PRODUCE A PILOT ARC ACROSS SAID GAP AS THE STUD IS RETRACTED, A SERIES INDUCTIVE CAPACITIVE CIRCUIT INCLUDING A CAPACITOR CONNECTED IN SERIES WITH AN INDUCTANCE, AND CONTROL MEANS ADAPTED TO DISCHARGE SAID INDUCTIVE CAPACITIVE CIRCUIT THROUGH SAID GAP UPON SAID PILOT ARC AND IN TIMED RELATIONSHIP WITH SAID RETRACTING, HOLDING AND RETURN MECHANISM MOVEMENT.
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) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |