GB369655A - Improvements relating to electron discharge tubes or thermionic valves - Google Patents
Improvements relating to electron discharge tubes or thermionic valvesInfo
- Publication number
- GB369655A GB369655A GB38338/30A GB3833830A GB369655A GB 369655 A GB369655 A GB 369655A GB 38338/30 A GB38338/30 A GB 38338/30A GB 3833830 A GB3833830 A GB 3833830A GB 369655 A GB369655 A GB 369655A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anode
- cathode
- shield
- shields
- respect
- 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
Landscapes
- Lasers (AREA)
- Electrolytic Production Of Metals (AREA)
- Discharge Lamp (AREA)
Abstract
369,655. Discharge rectifiers. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13D, Emmasingel, Eindhoven, Holland. Dec. 19, 1930, No. 38338. Convention date, July 9. [Class 39 (i).] In gas-filled rectifiers with one or more shields between the cathode and one or more anodes, one shield 12 is cylindrical with a closed cross section surrounding the cathode 11 and is shaped or mounted asymmetrically with respect to an anode 6. Different paths for the electron discharge from the cathode to the anode pass through the two open end, of the shield 12 but one is shorter than any other, reverse discharges being thus suppressed. In modfications, the asymmetry is ob tained or increased by additiona shields screening the anode witl respect to parts of the cathode or shield 12, for example, the shield 12 may carry a further shield extending at right-angles to it along the anode 6. As shown, the shield 12 is symmetrical with respect to the cathode and the anode 6 is mounted over one .end of the cathode. Alternatively, the anode may be centrally positioned and asymmetric in shape, or the shield may extend beyond the cathode farther at one end than at the other or may becut away at one end on the side near the anode. The lead 7 to the metal or graphite anode 6 may be covered with baked-on ceramic material or with a steatite tube 8 secured to the anode by such material. The cathode 11 may be coated with oxide or alloyed at its surface with emissive metal or may be indirectly heated. At starting, a discharge may be produced between the screen and the cathode or the screen is connected to the anode through a resistance or condenser. Specifications 345,080 and 357,794 are referred to. The Specification as open to inspection under Sect. 91 (3) (a) comprises also shields not completely surrounding the cathode and having a narrow or wide opening at the side remote from the anode. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL369655X | 1930-07-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB369655A true GB369655A (en) | 1932-03-21 |
Family
ID=19785526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB38338/30A Expired GB369655A (en) | 1930-07-09 | 1930-12-19 | Improvements relating to electron discharge tubes or thermionic valves |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2011981A (en) |
| GB (1) | GB369655A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1092376A (en) * | 1996-09-19 | 1998-04-10 | Tekunetsuto:Kk | Electrode device for discharge tube |
| EP1044462B1 (en) * | 1998-10-23 | 2004-08-18 | Koninklijke Philips Electronics N.V. | Low-pressure mercury vapour discharge lamp |
-
1930
- 1930-12-19 GB GB38338/30A patent/GB369655A/en not_active Expired
-
1931
- 1931-07-07 US US549277A patent/US2011981A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2011981A (en) | 1935-08-20 |
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