GB462243A - Improvements in or relating to cathode ray tubes - Google Patents
Improvements in or relating to cathode ray tubesInfo
- Publication number
- GB462243A GB462243A GB2444435A GB2444435A GB462243A GB 462243 A GB462243 A GB 462243A GB 2444435 A GB2444435 A GB 2444435A GB 2444435 A GB2444435 A GB 2444435A GB 462243 A GB462243 A GB 462243A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- electrode
- anode
- ray tubes
- oxide
- 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
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/48—Electron guns
- H01J29/487—Replacing parts of the gun; Relative adjustment of the electrodes
Landscapes
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
462,243. Cathode-ray tubes. BARASCH, H. P. Sept. 2, 1935, No. 24444. [Class 39 (i)] In cathode-ray tubes with a cathode c having a flat surface at right angles to the axis of an electrode system which includes an apertured electrode g adjacent the cathode c, the cathode or the system is rotatably mounted about an axis parallel to, and spaced from, the axis of the system so that the operative part of the cathode surface can be changed. As shown, an insulating body i carrying the cathode c and containing a heater therefor is rotatably carried in an extension g<3> of the fixed electrode g serving as control electrode. Clamps p<1>, p2 with interposed insulation j<1> . . . j<3> hold the parts g, g<3> and a first anode a together and are mounted on rods m<1>, m<2>. A second anode b is arranged at the top of the anode a. The cathode c is rotated from outside the tube by means of magnetic pieces w<1>, w<2> on arms kl, k2 or by shaking, a single arm with a weight at its end being then provided, or by means of a ground joint in the wall or foot s of the tube. Instead of coating the cathode uniformly with oxide, separate oxide spots may be provided and brought into operation successively. These spots may be of different size or material and may be applied after assembly of the system through the apertures in the electrodes a, g. Small recesses may be provided in the cathode surface to receive the oxide. The pieces w<1>, w<2> may carry getter evaporated by highfrequency heating. In a modification, the circular groove f in the body i engaged by a finger on the part g<3> is replaced by a spiral groove so that rotation of the cathode also adjusts its distance from the electrode g. In other modifications, the part g<3> is insulated from the electrode g and receives the cathode c which contains or is surrounded by an insulated heater.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2444435A GB462243A (en) | 1935-09-02 | 1935-09-02 | Improvements in or relating to cathode ray tubes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2444435A GB462243A (en) | 1935-09-02 | 1935-09-02 | Improvements in or relating to cathode ray tubes |
Publications (1)
Publication Number | Publication Date |
---|---|
GB462243A true GB462243A (en) | 1937-03-02 |
Family
ID=10211817
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2444435A Expired GB462243A (en) | 1935-09-02 | 1935-09-02 | Improvements in or relating to cathode ray tubes |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB462243A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE750004C (en) * | 1938-09-01 | 1944-12-11 | Incandescent cathode for cathode ray tubes |
-
1935
- 1935-09-02 GB GB2444435A patent/GB462243A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE750004C (en) * | 1938-09-01 | 1944-12-11 | Incandescent cathode for cathode ray tubes |
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