GB473789A - Improvements in and relating to cathode-ray and photo electric discharge tubes - Google Patents
Improvements in and relating to cathode-ray and photo electric discharge tubesInfo
- Publication number
- GB473789A GB473789A GB20909/36A GB2090936A GB473789A GB 473789 A GB473789 A GB 473789A GB 20909/36 A GB20909/36 A GB 20909/36A GB 2090936 A GB2090936 A GB 2090936A GB 473789 A GB473789 A GB 473789A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- ray
- gutter
- electric discharge
- tube
- 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
- H01J3/00—Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
- H01J3/02—Electron guns
- H01J3/027—Construction of the gun or parts thereof
Landscapes
- Electrodes For Cathode-Ray Tubes (AREA)
- X-Ray Techniques (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
473,789. Cathode-ray tubes; photoelectric cells. BRITISH THOMSONHOUSTON CO., Ltd. July 28, 1936, No. 20909. Convention date, July 29, 1935. [Class 39 (i)] In a cathode-ray or photo-electric discharge tube the cathode in the form of a fine film is renewed during operation of the tube by a supply of an activating material from an electrode arranged not to disturb the lens system in the tube. The renewing material may be held in a gutter 4, Fig. 1a, mounted inside the shield 3 for the cathode 1, the shield at cathode potential having a slit outlet 7 ; in another form the gutter 4 surrounds an accelerating anode 6, or a part of this anode may form the distribution means for the material. The gutter may be heated electrically or electrolytic means may be used to volatilize the supply material. This may be an alkali metal compound, caesium hydride being an example.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE473789X | 1935-07-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB473789A true GB473789A (en) | 1937-10-20 |
Family
ID=6541619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20909/36A Expired GB473789A (en) | 1935-07-29 | 1936-07-28 | Improvements in and relating to cathode-ray and photo electric discharge tubes |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2189998A (en) |
| GB (1) | GB473789A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2951945A (en) * | 1954-05-26 | 1960-09-06 | Schlumberger Well Surv Corp | Renewable target |
| US2875361A (en) * | 1955-05-31 | 1959-02-24 | Rca Corp | Auxiliary heaters to aid in activation of cathode ray type guns |
| US2880342A (en) * | 1956-10-25 | 1959-03-31 | Gen Dynamics Corp | Electron beam for a cathode ray tube |
| US2919380A (en) * | 1957-07-23 | 1959-12-29 | Philco Corp | Electron discharge devices |
-
1936
- 1936-07-16 US US90837A patent/US2189998A/en not_active Expired - Lifetime
- 1936-07-28 GB GB20909/36A patent/GB473789A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2189998A (en) | 1940-02-13 |
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