Patent US3973574A successfully refreshed from Google Patents.
Patent US4639633A successfully refreshed from Google Patents.
US4639633A
Expired / Lapsed
US
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Electron tube with cathode cooling device
Assignee: Thales SA
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Filing: 1985-05-07
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Granted: 1987-01-27
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Expires: 2005-05-07
Abstract
Abstract An electron tube with a cathode cooling device comprising an anode, a cathode and at least one grid in which the cathode is connected to an output connection through at least one skirt. Inside said tube, at the level of the connection between said skirt and said output connection, a tubular element is provided comprising a spiral shaped part which is extended by at least one inlet tube and one outlet tube emerging on the outside, said tubular element having a cooling fluid flowing therethrough.
Inventors
- 👤 Roger Hoet
- 👤 Pierre Gerlach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:18
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/74
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
118 words
An electron tube comprising coaxial electrodes including a cathode, an anode and at least a control grid, means forming with said electrodes a tube envelope, skirt means within said envelope having a first end and a second end, said first end connected to the cathode, plate means within said envelope and connected to said second end of said skirt means, output connection means connected to the plate means and extending through the envelope for providing external connection to the cathode, and tubular means having a spiral portion with an inlet and an outlet and included within said plate means for flowing cooling fluid for cooling said plate means and said skirt means with little cooling of the cathode.
Claim 2
Dependent Claim
118 words
An electron tube comprising coaxial electrodes including a cathode, an anode and at least a control grid, means forming with said electrodes a tube envelope, skirt means within said envelope having a first end and a second end, said first end connected to the cathode, plate means within said envelope and connected to said second end of said skirt means, output connection means connected to the plate means and extending through the envelope for providing external connection to the cathode, and tubular means having a spiral portion with an inlet and an outlet and included within said plate means for flowing cooling fluid for cooling said plate means and said skirt means with little cooling of the cathode.
Claim 3
Dependent Claim
25 words
An electron tube in accordance with claim 1 in which the plate means includes a groove for supporting the spiral portion of the tubular means.
References Cited (Backward Citations)
US2731244A
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US3315107A
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US3309556A
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US3401292A
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US3882351A
Cited
FR2517117A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-26 | 1990-07-28 | 1991-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-26 | 1994-07-28 | 1995-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-26 | 1998-07-28 | 1999-01-27 | $7700.00 | Window Closed / Lapsed |