GB505951A - Improvements in or relating to electric discharge devices - Google Patents
Improvements in or relating to electric discharge devicesInfo
- Publication number
- GB505951A GB505951A GB25012/38A GB2501238A GB505951A GB 505951 A GB505951 A GB 505951A GB 25012/38 A GB25012/38 A GB 25012/38A GB 2501238 A GB2501238 A GB 2501238A GB 505951 A GB505951 A GB 505951A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- core
- nickel
- centimetres
- relating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J17/00—Gas-filled discharge tubes with solid cathode
- H01J17/02—Details
- H01J17/04—Electrodes; Screens
- H01J17/06—Cathodes
Landscapes
- Solid Thermionic Cathode (AREA)
- Lasers (AREA)
Abstract
505,951. Thermionic cathodes. WESTINGHOUSE ELECTRIC & MANUFACTUR. ING CO. Aug. 25, 1938, No. 25012. Convention date, Sept. 16, 1937. [Class 39 (i)] A cathode comprises a core formed from ribbon material so shaped as to provide a passage extending therethrough which increases in cross-sectional area along part or the whole of its length. In the form shown, the cathode core 7 is formed by winding up into a helix a tapered nickel or nickel-cobalt ribbon coated with barium and strontium oxides. The core is assembled with a heater 5 embedded in a refractory coating 8 surrounded by metallic sleeves 9, 11 supporting the cathode from the envelope 1 and the sleeve 11 may have a reflecting coating. The tube may contain mercury 12 or a permanent gas and may have fluid cooled surfaces above the cathode. The control electrode 3 may be of carbonized nickel mesh wires À02 centimetres in diameter and be spaced two centimetres from the face of the anode 2. Suitable dimensions of the cathode are given.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US164147A US2210674A (en) | 1937-09-16 | 1937-09-16 | Cathode for electronic tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB505951A true GB505951A (en) | 1939-05-19 |
Family
ID=22593180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25012/38A Expired GB505951A (en) | 1937-09-16 | 1938-08-25 | Improvements in or relating to electric discharge devices |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2210674A (en) |
| FR (1) | FR841997A (en) |
| GB (1) | GB505951A (en) |
| NL (1) | NL50961C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2495831A (en) * | 1947-09-11 | 1950-01-31 | Hartford Nat Bank & Trust Co | Electric discharge tube comprising a liquid cathode and a capacitative ignition electrode provided therein |
| US5170091A (en) * | 1990-12-10 | 1992-12-08 | Ultraviolet Energy Generators, Inc. | Linear ultraviolet flash lamp with self-replenishing cathode |
-
0
- NL NL50961D patent/NL50961C/xx active
-
1937
- 1937-09-16 US US164147A patent/US2210674A/en not_active Expired - Lifetime
-
1938
- 1938-08-11 FR FR841997D patent/FR841997A/en not_active Expired
- 1938-08-25 GB GB25012/38A patent/GB505951A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR841997A (en) | 1939-06-02 |
| US2210674A (en) | 1940-08-06 |
| NL50961C (en) |
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