US2802422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Static resistance electric initiator
Assignee: Hercules Powder Co
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Filing: 1953-11-09
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Granted: 1957-08-13
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Expires: 1973-11-09
Abstract
No abstract record available.
Inventors
- 👤 Charles F Horne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:44
CPC Classifications
F; F42; F42B; F42B3/00; F42B3/10; F42B3/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A STATIC RESISTANT ELECTRIC INITATOR HAVING IN COMPBINATION A METALLIC SHELL, A PAIR OF LEAD WIRES, AN IGNITION PLUG OF SEMICONDUCTIVE MATERIAL DISPOSED ABOUT BARED PORTIONS OF THE LEAD WIRES WITHIN THE SHELL, A BRIDGE WIRE JOINING THE TERMINALS OF THE LEAD WIRES BELOW THE LOWER SURFACE OF THE PLUG, AN IGNITION COMPOSITION DIRECTLY BELOW SAID PLUG AND DISPOSED ABOUT THE BRIDGE WIRE, A SPACING BODY OF DIELECTRIC MATERIAL SURROUNDING A LOWER PORTION OF THE PLUG BETWEEN THE PLUG AND SHELL WALL, THE PORTION OF THE PLUG ABOVE THE SPACING BODY APPROACHING THE SHELL WALL BUT BEING SEPARATED THEREFROM BY A DISTANCE SUBSTANTIALLY LESS THAN THAT BETWEEN EITHER LEAD WIRE AND THE SHELL IN THE LOCUS OF THE IGNITION COMPOSITION, AND THE TOTAL RESISTANCE BETWEEN THE SHELL WALL AND PLUG BEING SUBSTANTIALLY LESS ABOVE THE SPACING BODY THAN AT ANY OTHER POINT ON THE PLUG.
Claim 2
Dependent Claim
145 words
A STATIC RESISTANT ELECTRIC INITATOR HAVING IN COMPBINATION A METALLIC SHELL, A PAIR OF LEAD WIRES, AN IGNITION PLUG OF SEMICONDUCTIVE MATERIAL DISPOSED ABOUT BARED PORTIONS OF THE LEAD WIRES WITHIN THE SHELL, A BRIDGE WIRE JOINING THE TERMINALS OF THE LEAD WIRES BELOW THE LOWER SURFACE OF THE PLUG, AN IGNITION COMPOSITION DIRECTLY BELOW SAID PLUG AND DISPOSED ABOUT THE BRIDGE WIRE, A SPACING BODY OF DIELECTRIC MATERIAL SURROUNDING A LOWER PORTION OF THE PLUG BETWEEN THE PLUG AND SHELL WALL, THE PORTION OF THE PLUG ABOVE THE SPACING BODY APPROACHING THE SHELL WALL BUT BEING SEPARATED THEREFROM BY A DISTANCE SUBSTANTIALLY LESS THAN THAT BETWEEN EITHER LEAD WIRE AND THE SHELL IN THE LOCUS OF THE IGNITION COMPOSITION, AND THE TOTAL RESISTANCE BETWEEN THE SHELL WALL AND PLUG BEING SUBSTANTIALLY LESS ABOVE THE SPACING BODY THAN AT ANY OTHER POINT ON THE PLUG.
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) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |