GB417192A - Improvements in thermionic valves - Google Patents
Improvements in thermionic valvesInfo
- Publication number
- GB417192A GB417192A GB973633A GB973633A GB417192A GB 417192 A GB417192 A GB 417192A GB 973633 A GB973633 A GB 973633A GB 973633 A GB973633 A GB 973633A GB 417192 A GB417192 A GB 417192A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screen
- clapton
- road
- thermionic valves
- london
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
- H01J19/28—Non-electron-emitting electrodes; Screens
- H01J19/30—Non-electron-emitting electrodes; Screens characterised by the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
- H01J2893/0012—Constructional arrangements
- H01J2893/0019—Chemical composition and manufacture
- H01J2893/002—Chemical composition and manufacture chemical
Landscapes
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
Abstract
417,192. Thermionic valves. NORTH LONDON VALVE & B.U.R.T.S., Ltd., Stoneham Road, and THOMAS, A. E. F., 125, Upper Clapton Road, both in Clapton, London. March 31, 1933, No. 9736. [Class 39 (i).] An electrostatic screen for a valve consists of carbon mixed with gum tragacanth and applied to the envelope ; this screen is connected to the cathode. To protect this screen it may be covered by an insulating coating consisting of aluminium mixed with an insulating binding material such as nitro-cellulose ; both coatings may be applied by a paint spray.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB973633A GB417192A (en) | 1933-03-31 | 1933-03-31 | Improvements in thermionic valves |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB973633A GB417192A (en) | 1933-03-31 | 1933-03-31 | Improvements in thermionic valves |
Publications (1)
Publication Number | Publication Date |
---|---|
GB417192A true GB417192A (en) | 1934-10-01 |
Family
ID=9877775
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB973633A Expired GB417192A (en) | 1933-03-31 | 1933-03-31 | Improvements in thermionic valves |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB417192A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2449397A (en) * | 1945-01-31 | 1948-09-14 | American Bosch Corp | Electric spark gap |
-
1933
- 1933-03-31 GB GB973633A patent/GB417192A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2449397A (en) * | 1945-01-31 | 1948-09-14 | American Bosch Corp | Electric spark gap |
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