GB295293A - Improvements in or relating to gasfilled electric discharge tubes - Google Patents
Improvements in or relating to gasfilled electric discharge tubesInfo
- Publication number
- GB295293A GB295293A GB587727A GB587727A GB295293A GB 295293 A GB295293 A GB 295293A GB 587727 A GB587727 A GB 587727A GB 587727 A GB587727 A GB 587727A GB 295293 A GB295293 A GB 295293A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- anodes
- helix
- coated
- diameter
- 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
- Discharge Lamp (AREA)
Abstract
295,293. Wade, H., (Naamlooze Vennootschap Philips' Glocilampenfabrieken). March 2, 1927. Vacuum tubes.-In gasfilled rectifiers having an incandescent cathode constituted by a helically wound wire containing at least superficially a substance of high electron emission relative to tungsten, the diameter of and distance between the turns of the helix are so large that both the inner and outer surfaces of the cathode emit electrons and are covered with a discharge glow. The cathode may be coated with, or contain, active material or may be entirely of such material, for example, of hafnium. The diameter of the helix is preferably greater than 4 mm. but may be 3 mm. The cathode may comprise a helical tungsten wire 2 around which is wound helically a nickel wire, the whole being coated with barium oxide. This cathode cooperates with anodes 7, 8 separated by a screen 9 preventing discharges between the anodes. Pressures of fillings of argon and dimensions of corresponding cathodes are specified
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE348018D BE348018A (en) | 1927-03-02 | ||
| GB587727A GB295293A (en) | 1927-03-02 | 1927-03-02 | Improvements in or relating to gasfilled electric discharge tubes |
| FR646663D FR646663A (en) | 1927-03-02 | 1927-12-31 | Gas discharge tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB587727A GB295293A (en) | 1927-03-02 | 1927-03-02 | Improvements in or relating to gasfilled electric discharge tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB295293A true GB295293A (en) | 1928-08-02 |
Family
ID=9804277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB587727A Expired GB295293A (en) | 1927-03-02 | 1927-03-02 | Improvements in or relating to gasfilled electric discharge tubes |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE348018A (en) |
| FR (1) | FR646663A (en) |
| GB (1) | GB295293A (en) |
-
0
- BE BE348018D patent/BE348018A/xx unknown
-
1927
- 1927-03-02 GB GB587727A patent/GB295293A/en not_active Expired
- 1927-12-31 FR FR646663D patent/FR646663A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR646663A (en) | 1928-11-14 |
| BE348018A (en) |
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