GB546583A - Improvements in or relating to electric discharge tubes - Google Patents
Improvements in or relating to electric discharge tubesInfo
- Publication number
- GB546583A GB546583A GB965541A GB965541A GB546583A GB 546583 A GB546583 A GB 546583A GB 965541 A GB965541 A GB 965541A GB 965541 A GB965541 A GB 965541A GB 546583 A GB546583 A GB 546583A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrodes
- layer
- thin layer
- photo
- heated
- 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
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/12—Manufacture of electrodes or electrode systems of photo-emissive cathodes; of secondary-emission electrodes
-
- 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
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/08—Electrodes intimately associated with a screen on or from which an image or pattern is formed, picked-up, converted or stored, e.g. backing-plates for storage tubes or collecting secondary electrons
-
- 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
-
- 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
- H01J40/16—Photoelectric discharge tubes not involving the ionisation of a gas having photo- emissive cathode, e.g. alkaline photoelectric cell
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2201/00—Electrodes common to discharge tubes
- H01J2201/32—Secondary emission electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2201/00—Electrodes common to discharge tubes
- H01J2201/34—Photoemissive electrodes
-
- 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
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Discharge Lamp (AREA)
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
Abstract
546,583. Discharge apparatus. PHILIPS LAMPS, Ltd. (Naamlooze Vennootschap Philips' Gloeilampenfabrieken). July 29, 1941, No. 9655. Drawings to Specification. [Class 39 (i)] Silver electrodes, in a discharge tube containing an active layer of alkaline oxide, are coated with a very thin layer (0.01 micron or less) of an oxide of beryllium, magnesium, aluminium, zirconium, thorium or silicon, whereby the formation of active layers on these electrodes is avoided. The active layer may be photo- or secondary-emissive, for example caesium-silveroxide, such as are employed in photo-cells, iconoscopes, multiplier tubes and picture transformers. Usually the electrodes are coatings on the envelope, to form focusing or screening members. The thin layer may be applied by volatilization from a heated tungsten spiral or by heating a layer of ethyl orthosilicate ester sprayed or smeared on the electrode, which when heated to 100‹ C. will decompose leaving a thin layer of silicon dioxide.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL222638X | 1939-08-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB546583A true GB546583A (en) | 1942-07-20 |
Family
ID=19779458
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB965541A Expired GB546583A (en) | 1939-08-24 | 1941-07-29 | Improvements in or relating to electric discharge tubes |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE440589A (en) |
CH (1) | CH222638A (en) |
DK (1) | DK61570C (en) |
FR (1) | FR871206A (en) |
GB (1) | GB546583A (en) |
-
1941
- 1941-02-12 DK DK61570D patent/DK61570C/en active
- 1941-02-15 BE BE440589D patent/BE440589A/xx unknown
- 1941-02-18 CH CH222638D patent/CH222638A/en unknown
- 1941-03-31 FR FR871206D patent/FR871206A/en not_active Expired
- 1941-07-29 GB GB965541A patent/GB546583A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR871206A (en) | 1942-04-17 |
BE440589A (en) | 1941-03-31 |
CH222638A (en) | 1942-07-31 |
DK61570C (en) | 1943-11-15 |
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