GB470093A - Electrical discharge tube - Google Patents
Electrical discharge tubeInfo
- Publication number
- GB470093A GB470093A GB30377/35A GB3037735A GB470093A GB 470093 A GB470093 A GB 470093A GB 30377/35 A GB30377/35 A GB 30377/35A GB 3037735 A GB3037735 A GB 3037735A GB 470093 A GB470093 A GB 470093A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- cathode
- nov
- carries
- webs
- 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
- H01J17/50—Thermionic-cathode tubes
- H01J17/52—Thermionic-cathode tubes with one cathode and one anode
- H01J17/54—Thermionic-cathode tubes with one cathode and one anode having one or more control electrodes
- H01J17/56—Thermionic-cathode tubes with one cathode and one anode having one or more control electrodes for preventing and then permitting ignition, but thereafter having no control
Landscapes
- Electrotherapy Devices (AREA)
- Devices For Medical Bathing And Washing (AREA)
Abstract
470,093. Thermionic valves. EGYESULT IZZOLAMPA ES VILLAMOSSAGI RESZVENYTARSASAG. Nov. 2, 1935, No. 30377. Void. Convention date, Nov. 2, 1934. [Class 39 (i)] In a gas and/or vapour filled discharge tube the grid 3 completely surrounds the cathode and the anode 2 is outside of the grid ; the upper end of the grid is closed by perforated plates 3a, 3b, the grid openings therein being less than 10 per cent of the entire grid surface. The diameter of the grid is less than twice the external diameter of the cathode ; at least the interior of the grid is polished for heat conservation. The lower end of the grid is closed by a solid or gauze annulus 22 which carries a mica annular plate 23 supporting the cathode. The support wires 26, 27 for the grid are broken, glass beads 33 being interposed in the breaks. The distance from the grid to the wall of the envelope 1 exceeds 5 mm. The indirectly heated cathode comprises a central insulating core 6, which carries the heater wires 7, 8 and on which is mounted the cathode body consisting of concentric cylinders 4c, 5 connected by webs, the cylinders and webs supporting emissive material; heat-insulating shields 4a, 4b, are carried by the cathode.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HU470093X | 1934-11-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB470093A true GB470093A (en) | 1937-08-03 |
Family
ID=10979273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30377/35A Expired GB470093A (en) | 1934-11-02 | 1935-11-02 | Electrical discharge tube |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR797031A (en) |
| GB (1) | GB470093A (en) |
-
1935
- 1935-10-29 FR FR797031D patent/FR797031A/en not_active Expired
- 1935-11-02 GB GB30377/35A patent/GB470093A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR797031A (en) | 1936-04-20 |
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