Patent US4374577A successfully refreshed from Google Patents.
Patent US3594604A successfully refreshed from Google Patents.
US3594604A
Expired / Lapsed
US
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High-power electron tube having two longitudinally displaced cathode sections
Assignee: TDK Micronas GmbH
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Filing: 1968-05-17
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Granted: 1971-07-20
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Expires: 1988-05-17
Abstract
Abstract A split cathode and support structure for a high-power triode permit operation at increased voltages and relatively low currents. Longitudinal conductive support members maintain dimensional stability of the elements while providing a common connection to both portions of the cathode.
Inventors
- 👤 Joseph J Tritchler
- 👤 Paul Merrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:58
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/42; H01J19/28; H01J19/32; H01J19/34; H01J2893/00; H01J2893/0001; H01J2893/0002; H01J2893/0003
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
89 words
An electron discharge device comprising an evacuated envelope including a directly heated tubular wire mesh cathode, a coaxially arranged grid surrounding said cathode in spaced insulating relation thereto, and an anode surrounding said grid, said cathode having two longitudinally displaced tubular mesh sections, a plurality of longitudinal conductive support members for each said section extending within said cathode, one group of said support members forming a common connection between said two cathode sections, and electrical connection means for said anode, grid and cathode support members passing through said envelope.
Claim 2
Dependent Claim
89 words
An electron discharge device comprising an evacuated envelope including a directly heated tubular wire mesh cathode, a coaxially arranged grid surrounding said cathode in spaced insulating relation thereto, and an anode surrounding said grid, said cathode having two longitudinally displaced tubular mesh sections, a plurality of longitudinal conductive support members for each said section extending within said cathode, one group of said support members forming a common connection between said two cathode sections, and electrical connection means for said anode, grid and cathode support members passing through said envelope.
Claim 3
Dependent Claim
69 words
The device of claim 1 wherein said longitudinal support members are metallic rods and said cathode includes lateral supporting plates at upper, lower and intermediate ends of said two sections, groups of said longitudinal support rods being connected to each said lateral plate, said one group passing through and insulated from said plate at said lower end and connecting together two intermediate end plates of said two cathode sections.
Claim 4
Dependent Claim
30 words
The device of claim 2 wherein said electrical connection means includes electrodes at the base of said envelope connected to said two cathode sections and to said common connection respectively.
Claim 5
Dependent Claim
28 words
The device of claim 3 wherein two electrodes are connected to said upper and lower ends of said cathode sections to provide a series arrangement for said cathodes.
Claim 6
Dependent Claim
25 words
The device of claim 4 including longitudinal support means insulatingly connected between said plate at said upper end of said cathode and said control grid.
Claim 7
Dependent Claim
21 words
The device of claim 5 wherein two electrodes are connected respectively between said common connection and one end of said cathode.
Claim 8
Dependent Claim
34 words
The device of claim 5 wherein said control grid comprises a plurality of vertical wire rods, a wire helically wound around said vertical rods, and annular support members along the length of said grid.
Claim 9
Dependent Claim
32 words
The device of claiM 6 including means selectively applying a source of potential to said two electrodes connected between said common connection and one end of said cathode for each cathode section.
Claim 10
Dependent Claim
12 words
The device of claim 7 including anode cooling means surrounding said anode.
Claim 11
Dependent Claim
32 words
The device of claim 7 wherein said envelope includes ceramic spacers and means sealing said spacers between said electric connection means for said anode, grid and cathode members to withstand high-voltage breakdown.
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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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |