Patent US3896352A successfully refreshed from Google Patents.
US3896352A
Expired / Lapsed
US
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Lightning arresters and surge diverters
Assignee: Bowthorpe Hellerman Ltd
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Filing: 1973-10-23
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Granted: 1975-07-22
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Expires: 1993-10-23
Abstract
Abstract Lightning arresters and surge diverters comprising a casing housing a plurality of series connected components arranged in two or more stacks, each component including non-linear resistors arranged around a spark gap unit and each component in any one of the stacks being electrically connected directly to a component in the other or one of the other stacks.
Inventors
- 👤 William Walter James Miles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:45
CPC Classifications
H; H01; H01T; H01T4/00; H01T4/16; H01T4/18
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
147 words
A high voltage device comprising a casing housing, a plurality of series connected components arranged in two or more stacks, each component in anyone of the stacks being electrically connected directly to a component in the other or one of the other stacks, said components each comprising a central annular ceramic plate, an annular non-linear resistor located on each side of the central plate, a spark gap unit located in the aperture defined by the central plate, two contact plates, one arranged on each side of the central plate so as to cover its surface and the aperture therein, and a cup-shaped insulation member arranged over the central portion of the contact plate on each side of the central plate, the components being separated by circular ceramic plates so that the weight of the whole assembly is taken by the cup-shaped insulation members and the central plates.
Claim 2
Dependent Claim
147 words
A high voltage device comprising a casing housing, a plurality of series connected components arranged in two or more stacks, each component in anyone of the stacks being electrically connected directly to a component in the other or one of the other stacks, said components each comprising a central annular ceramic plate, an annular non-linear resistor located on each side of the central plate, a spark gap unit located in the aperture defined by the central plate, two contact plates, one arranged on each side of the central plate so as to cover its surface and the aperture therein, and a cup-shaped insulation member arranged over the central portion of the contact plate on each side of the central plate, the components being separated by circular ceramic plates so that the weight of the whole assembly is taken by the cup-shaped insulation members and the central plates.
Claim 3
Dependent Claim
56 words
A device according to claim 1, wherein there extend from both sides of the inner and outer edges of said central annular ceramic plates cylindrical flanges, one said non-linear resistor being located between the flanges on each side of the plate, and said gap unit being located in the cylindrical cavity defined by the inner flanges.
Claim 4
Dependent Claim
25 words
A device according to claim 1, comprising a gap contact spring located between one end of each spark gap unit and the adjacent contact plate.
Claim 5
Dependent Claim
42 words
A device according to claim 1, wherein said circular ceramic plates have peripheral flanges, and each side of each ceramic plate supports a respective metal contact disc which is electrically connected to the metal contact disc of a component in another stack.
References Cited (Backward Citations)
US2611107A
Cited
US2611108A
Cited
US2881362A
Cited
US3566197A
Cited
US3611044A
Cited
US3706009A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-21 | 1979-01-20 | 1979-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-21 | 1983-01-20 | 1983-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-21 | 1987-01-20 | 1987-07-22 | $7700.00 | Window Closed / Lapsed |