GB624344A - Improvements in and relating to light-sensitive electric discharge devices - Google Patents
Improvements in and relating to light-sensitive electric discharge devicesInfo
- Publication number
- GB624344A GB624344A GB17720/47A GB1772047A GB624344A GB 624344 A GB624344 A GB 624344A GB 17720/47 A GB17720/47 A GB 17720/47A GB 1772047 A GB1772047 A GB 1772047A GB 624344 A GB624344 A GB 624344A
- Authority
- GB
- United Kingdom
- Prior art keywords
- control member
- cathode
- light
- anode
- heat shield
- 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
- H01J40/00—Photoelectric discharge tubes not involving the ionisation of a gas
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
624,344. Electron discharge apparatus. BRITISH THOMSON-HOUSTON CO., Ltd. July 4, 1947, No. 17720. Convention date, Sept. 24, 1942. [Class 39 (i)] A light-sensitive electric discharge device comprises an anode, a thermionic cathode, an electrostatic control member having a photosensitive surface facing the anode, and a heat shield for reducing the effect on the control member of the heat and light from the cathode. The heat shield comprises a metal wall member partially surrounding the cathode and a hollow tube-like member perpendicular to the wall member to provide a path for the discharge. Fig. 3 shows an exploded view of the heat shield 27 and control member 19. The cathode 8 may be supported at one end from a vitreous insulator 31 supported by the control member. The anode may be a nickel rod parallel to the cathode and the control member may comprise a nickel base with an oxide surface film on which is deposited antimony and caesium. The filling may be an inert gas such as argon or xenon at a pressure of 100-150 microns. A resistance 39 in series with the control member may be embedded in the filling compound fastening the base to the envelope.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US624344XA | 1942-09-24 | 1942-09-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB624344A true GB624344A (en) | 1949-06-02 |
Family
ID=22042454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB17720/47A Expired GB624344A (en) | 1942-09-24 | 1947-07-04 | Improvements in and relating to light-sensitive electric discharge devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB624344A (en) |
-
1947
- 1947-07-04 GB GB17720/47A patent/GB624344A/en not_active Expired
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