US3867663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide range pressure controlled spark gap
Assignee: Boeing Co
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Filing: 1973-05-14
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Granted: 1975-02-18
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Expires: 1993-05-14
Abstract
Abstract An adjustable spark gap device in which both the electrode spacing and the gas pressure are adjustable to provide a wide range of breakdown voltages. The electrodes are mounted so that the spacing and the gas pressure are simultaneously adjusted by changing only the gas pressure, so that only a single control is required for adjustment over a wide voltage range.
Inventors
- 👤 Willard E Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:37
CPC Classifications
H; H01; H01T; H01T2/00; H01T2/02; H01T11/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
18 words
A spark gap device as defined in claim 1 in which the bellows is open to atmospheric pressure.
Claim 2
Dependent Claim
17 words
A spark gap device as defined in claim 1 including spring means opposing compression of the bellows.
Claim 3
Dependent Claim
22 words
A spark gap device as defined in claim 3 in which the spring means is a compression spring disposed within the bellows.
Claim 4
Dependent Claim
18 words
A spark gap device as defined in claim 3 in which the bellows is open to atmospheric pressure.
Claim 5
Dependent Claim
21 words
A spark gap device as defined in claim 1 in which one of said electrodes is adjustably mounted in the enclosure.
Claim 6
Dependent Claim
114 words
An adjustable spark gap device for continuous adjustment over a wide range of breakdown voltages comprising a sealed, gas-tight enclosure, a pair of electrodes in said enclosure disposed to form a spark gap therebetween, at least one of said electrodes being mounted for movement toward and away from the other electrode, a compressible bellows device in the enclosure, said one electrode being mounted on said bellows, means for maintaining substantially constant pressure within the bellows device, the bellows device including means for resiliently opposing compression of the bellows, and means for admitting gas into the enclosure at a controlled and adjustable pressure to simultaneously adjust said gas pressure and the spacing between said electrodes.
Claim 7
Dependent Claim
18 words
A spark gap device as defined in claim 7 in which the bellows device includes a compression spring.
Claim 8
Dependent Claim
19 words
A spark gap device as defined in claim 7 in which the bellows device is vented to atmospheric pressure.
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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |