US3340718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
One-piece electrode
Assignee: Individual
•
Filing: 1965-03-04
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Granted: 1967-09-12
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Expires: 1985-03-04
Abstract
No abstract record available.
Inventors
- 👤 Raymond A Heisler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:24
CPC Classifications
B; B21; B21K; B21K23/00; F; F23; F23Q; F23Q3/00; F23Q3/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
THE METHOD OF FORMING AN ELECTRODE OF ONE-PIECE CONSTRUCTION FOR USE IN AN IGNITER SYSTEM SUCH AS IS USED IN OIL-BURNERS AND THE LIKE, THE STEPS INCLUDING: (1) CUTTING A BAR OF METAL ALLOY OF PRESELECTED DIAMETER TO A PREDETERMINED LENGTH; (2) FORMING AN ELECTRICAL CONDUCTOR ATTACHING MEANS ON ONE END OF THE BAR; (3) REDUCING AND EXTENDING THE END AND ADJACENT PORTION OF THE OTHER END OF THE BAR BY COLD HAMMERING THIS END PORTION TO REDUCE THIS DIAMETER OF THE BAR AND TO CAUSE THE DISPLACED METAL TO FLOW FORWARDLY; (4) COLD WORKING THE SURFACE OF THE REDUCED DIAMETER TO HARDEN THIS SURFACE OF THE TIP TO RESIST EROSION BY ELECTRICAL DISCHARGE; AND (5) FORMING SHOULDERED LIP PORTIONS ON THE SHANK TO PROVIDE RETAINING MEANS FOR MOUNTING OF THE ELECTRODE IN AN ELECTRODE HOLDER.
Claim 2
Independent Claim
136 words
THE METHOD OF FORMING AN ELECTRODE OF ONE-PIECE CONSTRUCTION FOR USE IN AN IGNITER SYSTEM SUCH AS IS USED IN OIL-BURNERS AND THE LIKE, THE STEPS INCLUDING: (1) CUTTING A BAR OF METAL ALLOY OF PRESELECTED DIAMETER TO A PREDETERMINED LENGTH; (2) FORMING AN ELECTRICAL CONDUCTOR ATTACHING MEANS ON ONE END OF THE BAR; (3) REDUCING AND EXTENDING THE END AND ADJACENT PORTION OF THE OTHER END OF THE BAR BY COLD HAMMERING THIS END PORTION TO REDUCE THIS DIAMETER OF THE BAR AND TO CAUSE THE DISPLACED METAL TO FLOW FORWARDLY; (4) COLD WORKING THE SURFACE OF THE REDUCED DIAMETER TO HARDEN THIS SURFACE OF THE TIP TO RESIST EROSION BY ELECTRICAL DISCHARGE; AND (5) FORMING SHOULDERED LIP PORTIONS ON THE SHANK TO PROVIDE RETAINING MEANS FOR MOUNTING OF THE ELECTRODE IN AN ELECTRODE HOLDER.
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) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |