US3707647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High frequency vacuum tube energy coupler
Assignee: Unisys Corp
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Filing: 1971-03-10
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Granted: 1972-12-26
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Expires: 1991-03-10
Abstract
Abstract A high frequency transmission line coupler for transfer of propagating high frequency energy with respect to the interior of a high frequency vacuum tube is characterized by a rugged vacuum envelope system permitting transfer of high power with freedom from the development of electrical arcs and cracking and leaking of vacuum seals. The structure eliminates the need for making a vacuum seal at the inner conductor of the coupling transmission line element and provides greatly increased tolerance to thermal and other shock mechanisms.
Inventors
- 👤 John L Rawls Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:38
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/36; H01J23/40; H01J23/48; H01J23/50
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
181 words
An electron stream device comprising: electron stream forming means, high frequency circuit means in energy exchanging relation with said electron stream, transmission line means in energy exchanging relation with said high frequency circuit means, vacuum envelope means supporting said electron stream forming means, said high frequency circuit means, and said transmission line means, said transmission line means comprising first and second concentric high frequency conductor means extending outwardly through said vacuum envelope means, said first conductor means having an enlarged thick-walled portion remote from said vacuum envelope means and having enlarged planar end surface means substantially perpendicular to said first conductor means, said second conductor means extending beyond said enlarged planar end surface means, and solid dielectric means having planar base surface means sealed in vacuum tight relation to said enlarged planar end surface means, said planar base surface means having an axial bore therein accommodating said second conductor means in sliding fit relation, and said solid dielectric means having a cylindrical diameter substantially greater than said axial bore so as to form a thick dielectric wall directly surrounding said bore.
Claim 2
Dependent Claim
181 words
An electron stream device comprising: electron stream forming means, high frequency circuit means in energy exchanging relation with said electron stream, transmission line means in energy exchanging relation with said high frequency circuit means, vacuum envelope means supporting said electron stream forming means, said high frequency circuit means, and said transmission line means, said transmission line means comprising first and second concentric high frequency conductor means extending outwardly through said vacuum envelope means, said first conductor means having an enlarged thick-walled portion remote from said vacuum envelope means and having enlarged planar end surface means substantially perpendicular to said first conductor means, said second conductor means extending beyond said enlarged planar end surface means, and solid dielectric means having planar base surface means sealed in vacuum tight relation to said enlarged planar end surface means, said planar base surface means having an axial bore therein accommodating said second conductor means in sliding fit relation, and said solid dielectric means having a cylindrical diameter substantially greater than said axial bore so as to form a thick dielectric wall directly surrounding said bore.
Claim 3
Dependent Claim
37 words
Apparatus as described in claim 1 wherein said solid dielectric means and said second conductor means are adapted to extend within hollow high frequency wave guide means for the purpose of transfer of high frequency energy therewithin.
Claim 4
Dependent Claim
35 words
Apparatus as described in claim 2 wherein the height and diameter of said solid dielectric means provide broad band impedance match between said hollow high frequency wave guide means and said concentric transmission line means.
Claim 5
Dependent Claim
14 words
Apparatus as described in claim 1 wherein said solid dielectric means comprises beryllium oxide.
Claim 6
Dependent Claim
36 words
Apparatus as described in claim 4 wherein: said first conductor means comprises a ferro-nickel alloy having a high frequency conductive surface coating, and said second conductor means comprises molybdenum having a high frequency conductive surface coating.
Claim 7
Dependent Claim
25 words
Apparatus as described in claim 1 wherein said solid dielectric means has outer surface means opposite said planar base surface means including an annular bevel.
Claim 8
Dependent Claim
40 words
Apparatus as described in claim 1 wherein: said transmission line means comprises helical slow wave propagation means having an end, and said second conductor is affixed in conductive energy exchanging relation with said ene of said helical wave propagation means.
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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) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |