US4758766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas discharge devices utilizing electron injection for gas ionization
Assignee: Teledyne UK Ltd
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Filing: 1985-12-18
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Granted: 1988-07-19
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Expires: 2005-12-18
Abstract
Abstract A gas discharge device includes an anode, an enclosure member having an aperture therein and substantially enclosing a volume of a gas filling, and a mechanism for injecting electrons into the volume of gas filling to produce ionization of the gas filling within the volume so that during operation of the device, the enclosure member and the ionization within the enclosure member constitute a cathode, and a conduction path is established between the interior of such cathode and the anode through the aperture of the enclosure member.
Inventors
- 👤 Clifford R. Weatherup
- 👤 Arthur Maitland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:37
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/50; H01J17/52; H01J17/54; H01J17/56
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
90 words
A gas discharge device, including: an anode, an enclosure member having an aperture therein and substantially enclosing a volume of a gas filling, and means for injecting electrons into said volume of gas filling to produce ionization of the gas filling within said volume such that during operation of said device, said enclosure member and the ionization of the gas filling within said enclosure member comprise a cathode, and a conduction path is established between the interior of said cathode and said anode through the aperture of said enclosure member.
Claim 2
Dependent Claim
90 words
A gas discharge device, including: an anode, an enclosure member having an aperture therein and substantially enclosing a volume of a gas filling, and means for injecting electrons into said volume of gas filling to produce ionization of the gas filling within said volume such that during operation of said device, said enclosure member and the ionization of the gas filling within said enclosure member comprise a cathode, and a conduction path is established between the interior of said cathode and said anode through the aperture of said enclosure member.
Claim 3
Dependent Claim
25 words
A device as claimed in claim 1, and wherein said enclosure member is arranged so that electrons injected into said volume pass through said aperture.
Claim 4
Dependent Claim
48 words
A device as claimed in claim 1, and wherein said means for injecting electrons comprises one or more electron emitting members located outside of said enclosure member, each said electron emitting member communicating with said volume via a respective hole in an outside wall of said enclosure member.
Claim 5
Dependent Claim
77 words
A device as claimed in claim 1, and wherein said means for injecting electrons into said volume comprises an electron emitting member having a hole in a surface thereof and wherein, except within the hole, at least substantially the whole of the surface of the electron emitting member is covered with an electrically insulating material, electrons being produced extensive of the hole when a suitably high voltage is applied between said electron emitting member and an anode.
Claim 6
Dependent Claim
21 words
A device as claimed in claim 3, and wherein said enclosure member acts as an anode for the electron emitting member.
Claim 7
Dependent Claim
21 words
A device as claimed in claim 3, and including a plurality of electron emitting members spaced equidistant around said enclosure member.
Claim 8
Dependent Claim
14 words
A device as claimed in claim 1, and wherein said gas filling is hydrogen.
Claim 9
Dependent Claim
15 words
A device as claimed in claim 1, and wherein said enclosure member is of molybdenum.
Claim 10
Dependent Claim
21 words
A device as claimed in claim 1, and wherein said enclosure member is integral with a support structure for another element.
Claim 11
Dependent Claim
20 words
A device as claimed in claim 1 and wherein said gas filling is at a pressure of approximately 0.5 Torr.
Claim 12
Dependent Claim
14 words
A device as claimed in claim 1, and wherein said device is a thyratron.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-19 | 1992-01-18 | 1992-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-19 | 1996-01-18 | 1996-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-19 | 2000-01-18 | 2000-07-19 | $7700.00 | Window Closed / Lapsed |