US4326232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightning arrester
Assignee: Toshiba Corp
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Filing: 1980-04-09
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Granted: 1982-04-20
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Expires: 2000-04-09
Abstract
Abstract A lightning arrestor comprising at least two stacks of resistor disks juxtaposed within a housing and electrically connected in parallel. The stacks include the same number of disks, at least 35, and preferably 100 or more. Each stack comprises at least two sub-stacks which are aligned end-to-end and electrically connected. Adjacent sub-stacks of parallel stacks are mechanically connected but electrically insulated from each other.
Inventors
- 👤 Susumu Nishiwaki
- 👤 Toshikazu Satoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:01
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/10; H01C7/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
91 words
A lightning arrestor comprising: a housing; a plurality of elongated electrical resistor stacks disposed in side-by-side relation in said housing and electrically connected in parallel; each of said stacks including a plurality of sub-stacks formed by stacked, non-linear resistor elements of uniform size, said sub-stacks of each stack being aligned end-to-end; means electrically connecting adjacent sub-stacks in each stack; the sub-stacks of each stack having the same number of resistor elements as the adjacent sub-stack of a parallel stack; and means mechanically connecting but electrically insulating adjacent sub-stacks of parallel stacks.
Claim 2
Dependent Claim
91 words
A lightning arrestor comprising: a housing; a plurality of elongated electrical resistor stacks disposed in side-by-side relation in said housing and electrically connected in parallel; each of said stacks including a plurality of sub-stacks formed by stacked, non-linear resistor elements of uniform size, said sub-stacks of each stack being aligned end-to-end; means electrically connecting adjacent sub-stacks in each stack; the sub-stacks of each stack having the same number of resistor elements as the adjacent sub-stack of a parallel stack; and means mechanically connecting but electrically insulating adjacent sub-stacks of parallel stacks.
Claim 3
Dependent Claim
42 words
A lightning arrestor according to claim 1, the adjacent sub-stacks of parellel stacks being connected by plates which sandwich the resistor elements of said sub-stacks, at least one of said plates being constructed of insulating material, and insulating bolts connecting said plates.
Claim 4
Dependent Claim
39 words
A lightning arrestor according to claim 2, the adjacent sub-stacks in each stack being electrically connected by conductors having portions trapped between the adjacent ends of said sub-stacks and the adjacent plate, said conductor portions connected to each other.
Claim 5
Dependent Claim
17 words
A lightning arrestor according to claim 1, said resistor stacks each including at least 35 resistor elements.
Claim 6
Dependent Claim
17 words
A lightning arrestor according to claim 1, said resistor stacks each including at least 100 resistor elements.
Claim 7
Dependent Claim
32 words
A lightning arrestor according to claim 2, the adjacent sub-stacks in each stack being electrically connected by conducting spacers which extend through openings in the plates at adjacent ends of adjacent sub-stacks.
Claim 8
Dependent Claim
31 words
A lightning arrestor according to claim 1, said housing including a plurality of portions each surrounding a respective set of sub-stacks of parallel stacks, and means for connecting adjacent housing portions.
Claim 9
Dependent Claim
18 words
A lightning arrestor according to claim 1, said housing being hermetically sealed and filled with an insulating gas.
Claim 10
Dependent Claim
16 words
A lightning arrestor according to claim 1, said resistor elements comprising disks constructed of zinc oxide.
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) | 1985-04-19 | 1985-10-19 | 1986-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-19 | 1989-10-19 | 1990-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-19 | 1993-10-19 | 1994-04-20 | $7700.00 | Window Closed / Lapsed |