GB353394A - Improvements in light sensitive electric discharge devices - Google Patents
Improvements in light sensitive electric discharge devicesInfo
- Publication number
- GB353394A GB353394A GB1744/30A GB174430A GB353394A GB 353394 A GB353394 A GB 353394A GB 1744/30 A GB1744/30 A GB 1744/30A GB 174430 A GB174430 A GB 174430A GB 353394 A GB353394 A GB 353394A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnesium
- metal
- cathode
- barium
- disc
- 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
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract 5
- 229910052749 magnesium Inorganic materials 0.000 abstract 5
- 239000011777 magnesium Substances 0.000 abstract 5
- 229910052783 alkali metal Inorganic materials 0.000 abstract 4
- 150000001340 alkali metals Chemical class 0.000 abstract 4
- 229910052788 barium Inorganic materials 0.000 abstract 3
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 abstract 3
- 239000010410 layer Substances 0.000 abstract 3
- 229910052792 caesium Inorganic materials 0.000 abstract 2
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical group [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 abstract 2
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 abstract 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 abstract 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract 1
- 229910001122 Mischmetal Inorganic materials 0.000 abstract 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 abstract 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 abstract 1
- 150000001342 alkaline earth metals Chemical class 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 229910052734 helium Inorganic materials 0.000 abstract 1
- 239000001307 helium Substances 0.000 abstract 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 abstract 1
- 229910052744 lithium Inorganic materials 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 229910052756 noble gas Inorganic materials 0.000 abstract 1
- 229910052700 potassium Inorganic materials 0.000 abstract 1
- 239000011591 potassium Substances 0.000 abstract 1
- 229910052701 rubidium Inorganic materials 0.000 abstract 1
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 abstract 1
- 150000003839 salts Chemical class 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 229910052709 silver Inorganic materials 0.000 abstract 1
- 239000004332 silver Substances 0.000 abstract 1
- 229910001923 silver oxide Inorganic materials 0.000 abstract 1
- 229910052708 sodium Inorganic materials 0.000 abstract 1
- 239000011734 sodium Substances 0.000 abstract 1
- 238000001228 spectrum Methods 0.000 abstract 1
- 239000002344 surface layer Substances 0.000 abstract 1
- 239000011800 void material Substances 0.000 abstract 1
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
- H01J40/02—Details
- H01J40/04—Electrodes
- H01J40/06—Photo-emissive cathodes
-
- 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
- Vessels And Coating Films For Discharge Lamps (AREA)
- Lasers (AREA)
- Gyroscopes (AREA)
Abstract
353,394. Photo-electric cells. ASSOCIATED ELECTRICAL INDUSTRIES, Ltd., Bush House, Aldwych, London.-(Assignees of Knowles, D. D.; 194, Castlegate Road, Wilkinsburg, Pennsylvania, U.S.A.) Jan. 17, 1930, No. 1744. Convention date, Jan. 18, 1929. Void Published under Sect. 91 of the Acts]. [Class 39 (i).] A photo-electric cell has a cathode consisting of a thin layer of an alkali metal or barium on a layer of magnesium, an alkalineearth metal, misch metal, silver, or silver oxide, and a filling of a noble gas such as helium. A cathode consisting of a layer of barium on magnesium has maximum sensitivity in the red region of the spectrum ; by substituting caesium for barium the maximum is displaced towards the blue-green region, and by using rubidium, potassium or sodium as the surface layer the maximum is moved towards the ultra-violet region. Lithium or two or more alkali metals may be used. The lead 2 for the cathode 8 has an extension carrying a disc 4 on which a piece of magnesium 5 is welded. After evacuation of the envelope, the disc is treated by high frequency current and the magnesium is vaporized and deposited on the wall. Alkali metal may be introduced by heating a tube containing the metal; or caesium trinitride may be painted on a part of the disc 4 removed from the magnesium ; or a salt of the alkali metal may be heated by bombardment. The anode 3 consists of a wire enclosed by a glass sleeve 6, the area of the cathode being at least 10 times the active area of the anode.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US353394XA | 1929-01-18 | 1929-01-18 | |
| US333389A US1955335A (en) | 1929-01-18 | 1929-01-18 | Photoglow tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB353394A true GB353394A (en) | 1931-07-23 |
Family
ID=26712007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1744/30A Expired GB353394A (en) | 1929-01-18 | 1930-01-17 | Improvements in light sensitive electric discharge devices |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1955335A (en) |
| GB (1) | GB353394A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2434622A (en) * | 1942-09-24 | 1948-01-13 | Gen Electric | Light sensitive electric discharge device |
| US2537225A (en) * | 1947-04-22 | 1951-01-09 | Continental Electric Company | Photoelectric tube and method of manufacture |
| US2685531A (en) * | 1948-06-28 | 1954-08-03 | Gen Electric | Light-sensitive electron-emissive electrode |
| BE521169A (en) * | 1948-12-03 | |||
| US2688648A (en) * | 1951-01-10 | 1954-09-07 | Oran T Mcilvaine | Electron-generating element for pilot flame safety controls |
| US2764709A (en) * | 1952-11-10 | 1956-09-25 | Oran T Mcilvaine | Electronic noise generator |
| YU286278A (en) * | 1978-12-07 | 1983-12-31 | Esref Halilovic | Photoactive ionizing high-voltage pulsator of a system for starting engines having carburetors |
-
1929
- 1929-01-18 US US333389A patent/US1955335A/en not_active Expired - Lifetime
-
1930
- 1930-01-17 GB GB1744/30A patent/GB353394A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US1955335A (en) | 1934-04-17 |
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