GB751251A - Improvements in or relating to electric discharge tubes - Google Patents
Improvements in or relating to electric discharge tubesInfo
- Publication number
- GB751251A GB751251A GB7763/54A GB776354A GB751251A GB 751251 A GB751251 A GB 751251A GB 7763/54 A GB7763/54 A GB 7763/54A GB 776354 A GB776354 A GB 776354A GB 751251 A GB751251 A GB 751251A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anode
- grid
- coated
- march
- nickel
- 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
- 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
- Discharge Lamp (AREA)
Abstract
751,251. Thermionic valves; electrode materials. PHILIPS ELECTRICAL INDUSTRIES, Ltd. March 17, 1954 [March 20, 1953], No. 7763/54. Drawings to Specification. Class 39 (1). A valve for very low-voltage operation has the grid coated with a material of higher work function than the grid material and the anode coated with a material of lower work function than the anode material. The resulting contact potentials give inherent negative bias to the grid, which can thus be worked without external bias; and an increased effective anode voltage, so that the anode supply can be less (e.g. 6 volts). The grid may be molybdenum coated with gold or platinum, while the anode may be nickel, nickel-clad iron, or aluminiumclad iron, coated with barium or caesium. The valve is preferably a tetrode as no secondaryemission dip can occur at such low voltages. Characteristic curves are given.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL751251X | 1953-03-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB751251A true GB751251A (en) | 1956-06-27 |
Family
ID=19824731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7763/54A Expired GB751251A (en) | 1953-03-20 | 1954-03-17 | Improvements in or relating to electric discharge tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB751251A (en) |
-
1954
- 1954-03-17 GB GB7763/54A patent/GB751251A/en not_active Expired
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