GB521967A - Gas or metal-vapour electric discharge devices and electrode supports relating thereto - Google Patents
Gas or metal-vapour electric discharge devices and electrode supports relating theretoInfo
- Publication number
- GB521967A GB521967A GB34773/38A GB3477338A GB521967A GB 521967 A GB521967 A GB 521967A GB 34773/38 A GB34773/38 A GB 34773/38A GB 3477338 A GB3477338 A GB 3477338A GB 521967 A GB521967 A GB 521967A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screen
- grid
- cathode
- insulated
- metal
- 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
- Gas-Filled Discharge Tubes (AREA)
Abstract
521,967. Thermionic valves. STANDARD TELEPHONES & CABLES, Ltd. Nov. 29, 1938, No. 34773. Convention date, Dec. 4, 1937. [Class 39 (i)] In a gas-filled valve of the type in which the cathode is arranged within a cylindrical screen over the end of which is mounted a flanged grid insulated from the screen, the grid connection is inside the screen but is protected from the cathode by a channel-shaped shield attached to or forming part of the screen. In the arrangement shown the cathode 20 is of the directlyheated type and is formed of a sheet of metal folded as shown in Fig. 2. It is supported by the leads 19, 21 and supports 22 attached to, but insulated from, the bottom of the cylindrical screen 27. The midpoint of the cathode is connected to the screen by pieces 25, 26. The grid 41 is a flanged plate, which may be of graphite, perforated with holes which may be zig-zag or inclined. It is formed with an inwardly-projecting flange 44 which is bolted to a flange on the upper end of the screen by means of insulated bolts, insulating blocks being placed between the grid and the screen. The grid connection 34 is a rigid wire, or an insulated flexible wire, passing through a channel member 35 fixed inside the screen. The anode 17 is cup-shaped, enclosing the grid. The anode connection passes through a seal protected by the screen 11. A metal screen 8 for protecting the seal for the grid and cathode leads is mounted on, and insulated from, these leads. For attaching the cathode to the posts 22 by which it is supported on the grid then posts are provided with flat surfaces to which the cathode is soldered with the aid of reinforcing metal strips, different arrangements of which are described.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR839389T | 1937-12-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB521967A true GB521967A (en) | 1940-06-05 |
Family
ID=9299486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB34773/38A Expired GB521967A (en) | 1937-12-04 | 1938-11-29 | Gas or metal-vapour electric discharge devices and electrode supports relating thereto |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR839389A (en) |
| GB (1) | GB521967A (en) |
-
1937
- 1937-12-04 FR FR839389D patent/FR839389A/en not_active Expired
-
1938
- 1938-11-29 GB GB34773/38A patent/GB521967A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR839389A (en) | 1939-04-03 |
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