US3290547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure relief and failure indicating means for arrester
Assignee: McGraw Edison Co
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Filing: 1964-10-19
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Granted: 1966-12-06
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Expires: 1984-10-19
Abstract
No abstract record available.
Inventors
- 👤 Edward L Sankey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:32
CPC Classifications
H; H01; H01T; H01T1/00; H01T1/12; H01T1/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
IN A LIGHTNING ARRESTER HAVING A TUBULAR INSULATING HOUSING ENCLOSING SPARK GAP AND VALVE BLOCK RESISTOR ELEMENTS, A RUPTURABLE PRESSURE SENSITIVE DIAPHRAGM SEALING ONE END OF SAID HOUSING, A CUP-SHAPED METALLIC END MEMBER SURROUNDING SAID ONE END OF SAID HOUSING AND SAID DIAPHRAGM AND DEFINING A VENTING CHAMBER SEALED FROM THE INTERIOR OF SAID HOUSING BY SAID DIAPHRAGM AND ALSO HAVING VENTING APERTURES IN THE SIDEWALL THEREOF COMMUNICATING WITH SAID VENTING CHAMBER, AND PLUGS RELEASABLY CLOSING SAID VENTING APERTURES AND BEING ADAPTED TO BE EJECTED THEREFROM IN RESPONSE TO A PREDETERMINED PRESSURE WITHIN SAID VENTING CHAMBER INCIDENT TO RUPTURE OF SAID DIAPHRAGM CAUSED BY FAILURE OF SAID ARRESTER AND BUILDUP OF PRESSURE WITHIN SAID HOUSING, WHERBEY SAID DIAPHRAGM AND PLUGS VENT AND ARRESTER TO PREVENT RUPTURE OF SAID HOUSING AND PROVIDE A POSITIVE VISUAL INDICATION OF ARRESTER FAILURE.
Claim 2
Dependent Claim
138 words
IN A LIGHTNING ARRESTER HAVING A TUBULAR INSULATING HOUSING ENCLOSING SPARK GAP AND VALVE BLOCK RESISTOR ELEMENTS, A RUPTURABLE PRESSURE SENSITIVE DIAPHRAGM SEALING ONE END OF SAID HOUSING, A CUP-SHAPED METALLIC END MEMBER SURROUNDING SAID ONE END OF SAID HOUSING AND SAID DIAPHRAGM AND DEFINING A VENTING CHAMBER SEALED FROM THE INTERIOR OF SAID HOUSING BY SAID DIAPHRAGM AND ALSO HAVING VENTING APERTURES IN THE SIDEWALL THEREOF COMMUNICATING WITH SAID VENTING CHAMBER, AND PLUGS RELEASABLY CLOSING SAID VENTING APERTURES AND BEING ADAPTED TO BE EJECTED THEREFROM IN RESPONSE TO A PREDETERMINED PRESSURE WITHIN SAID VENTING CHAMBER INCIDENT TO RUPTURE OF SAID DIAPHRAGM CAUSED BY FAILURE OF SAID ARRESTER AND BUILDUP OF PRESSURE WITHIN SAID HOUSING, WHERBEY SAID DIAPHRAGM AND PLUGS VENT AND ARRESTER TO PREVENT RUPTURE OF SAID HOUSING AND PROVIDE A POSITIVE VISUAL INDICATION OF ARRESTER FAILURE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |