GB573852A - Improvements in and relating to electron discharge devices - Google Patents
Improvements in and relating to electron discharge devicesInfo
- Publication number
- GB573852A GB573852A GB1677843A GB1677843A GB573852A GB 573852 A GB573852 A GB 573852A GB 1677843 A GB1677843 A GB 1677843A GB 1677843 A GB1677843 A GB 1677843A GB 573852 A GB573852 A GB 573852A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anode
- vacuum
- cathode
- envelope
- barium
- 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
- H01J7/00—Details not provided for in the preceding groups and common to two or more basic types of discharge tubes or lamps
- H01J7/14—Means for obtaining or maintaining the desired pressure within the vessel
- H01J7/18—Means for absorbing or adsorbing gas, e.g. by gettering
Abstract
573,852. Discharge apparatus. BRITISH THOMSON-HOUSTON CO., Ltd. (General Electric Co.). Oct. 13, 1943, No. 16778. [Class 39 (i)] [Also in Group XXXVI] An electron discharge device comprises an evacuated envelope 13 containing .an anode 15 and a thoriated cathode 17 and gettering means comprising heating means 51 for evaporating a metal at a controlled rate. The gettering material may be barium and the evaporation takes place in a space 49 enclosed by a head 43 and a skirt 47 to prevent the barium from depositing on the working surfaces of the cathode and anode. The circuit shown below the envelope enables the vacuum in the envelope to be measured as with an ionisation gauge. A battery 69 under the control of a rheostat 73 sets up a fixed electron flow between the cathode and anode which will cause an amount of ionisation in the tube proportional to the degree of vacuum. The head 43 is biassed to collect these ions by battery 75 and the rate at which they are collected, which will be a function of the vacuum, is given by ammeter 77.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1677843A GB573852A (en) | 1943-10-13 | 1943-10-13 | Improvements in and relating to electron discharge devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1677843A GB573852A (en) | 1943-10-13 | 1943-10-13 | Improvements in and relating to electron discharge devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB573852A true GB573852A (en) | 1945-12-10 |
Family
ID=10083493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1677843A Expired GB573852A (en) | 1943-10-13 | 1943-10-13 | Improvements in and relating to electron discharge devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB573852A (en) |
-
1943
- 1943-10-13 GB GB1677843A patent/GB573852A/en not_active Expired
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