US3591822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric discharge vessel electrode structure of pyrolytic carbon discs
Assignee: Siemens AG
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Filing: 1968-12-12
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Granted: 1971-07-06
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Expires: 1988-12-12
Abstract
Abstract A high frequency power tube is provided with an electron gun in which the thermally heavy-duty electrodes and other parts thereof are provided as carbon bodies made of pyrolytical carbon interconnected in the form of discs which are coated with rhenium, and which for better conductivity are additionally coated with a metal of high electrical conductivity, preferably copper or silver.
Inventors
- 👤 Helmut Katz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:51
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/52; C04B41/80; C04B41/81; C04B41/89; H; H01; H01J; H01J19/00; H01J19/28; H01J19/30; C04B2111/00; C04B2111/90; C04B2111/94; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0019; H01J2893/002; H01J2893/0021
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
13 words
The improvement according to claim 1, wherein said carbon base comprises pyrolytic carbon.
Claim 2
Dependent Claim
12 words
The improvement according to claim 1, wherein said metal interlinings comprise molybdenum.
Claim 3
Dependent Claim
12 words
The improvement according to claim 1, wherein said metal interlinings comprise tantalum.
Claim 4
Dependent Claim
27 words
The improvement according to claim 1, comprising a metal layer carried on parts of the outer surface of the carbon base for increasing the electrical conductivity thereof.
Claim 5
Dependent Claim
12 words
The improvement according to claim 5, wherein said metal layer comprises rhenium.
Claim 6
Dependent Claim
28 words
The improvement according to claim 6, comprising a second metal layer carried on said metal layer of rhenium and having a higher electrical conductivity than that of rhenium.
Claim 7
Dependent Claim
13 words
The improvement according to claim 7, wherein said second metal layer comprises copper.
Claim 8
Dependent Claim
13 words
The improvement according to claim 8, wherein said second metal layer comprises silver.
Claim 9
Dependent Claim
23 words
The improvement according to claim 1, wherein means are provided for connecting said carbon discs in vacuumtight relation to form a vacuumtight structure.
Claim 10
Dependent Claim
24 words
The improvement according to claim 1, wherein said structure including said carbon base forms a delay-line structure for use in a traveling wave tube.
Claim 11
Dependent Claim
26 words
The improvement according to claim 1 wherein said structure has dimensions greater than 10 mm. in the direction of poor heat conductivity of said carbon base.
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |