US3248599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dirt-proof multiple-gap device for lightning arresters
Assignee: Hitachi Ltd
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Filing: 1963-02-11
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Granted: 1966-04-26
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Expires: 1983-02-11
Abstract
No abstract record available.
Inventors
- 👤 Masuda Junichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:29
CPC Classifications
H; H01; H01T; H01T4/00; H01T4/16; H01T4/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A DIRT-PROOF MULTIPLE-GAP DEVICE FOR A LIGHTNING ARRESTER OF THE TYPE INCLUDING A PORCELAIN HOUSING AND A STACKED MULTIPLE-GAP ASSEMBLY ENCLOSED IN SAID HOUSING WITH AN ANNULAR SPACED DEFINED THEREBETWEEN, COMPRISING AN ANNULAR CAPACITOR INSERTED IN SAID SPACE AND SUBSTANTIALLY FILLING SAID SPACE AND INCLUDING A SERIES CONNECTION OF ELEMENTARY CAPACITORS BETWEEN THE HIGH AND LOW POTENTIAL SIDES OF THE ARRESTER, SAID ANNULAR CAPACITOR BEING EFFECTIVE TO INTERCEPT THE STRAY CAPACITIES BETWEEN THE SURFACE OF THE PORCELAIN HOUSING AND THE STACKED MULTIPLEGAP ASSEMBLY.
Claim 2
Dependent Claim
83 words
A DIRT-PROOF MULTIPLE-GAP DEVICE FOR A LIGHTNING ARRESTER OF THE TYPE INCLUDING A PORCELAIN HOUSING AND A STACKED MULTIPLE-GAP ASSEMBLY ENCLOSED IN SAID HOUSING WITH AN ANNULAR SPACED DEFINED THEREBETWEEN, COMPRISING AN ANNULAR CAPACITOR INSERTED IN SAID SPACE AND SUBSTANTIALLY FILLING SAID SPACE AND INCLUDING A SERIES CONNECTION OF ELEMENTARY CAPACITORS BETWEEN THE HIGH AND LOW POTENTIAL SIDES OF THE ARRESTER, SAID ANNULAR CAPACITOR BEING EFFECTIVE TO INTERCEPT THE STRAY CAPACITIES BETWEEN THE SURFACE OF THE PORCELAIN HOUSING AND THE STACKED MULTIPLEGAP ASSEMBLY.
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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |