GB542488A - Improvements in or relating to electron discharge devices - Google Patents
Improvements in or relating to electron discharge devicesInfo
- Publication number
- GB542488A GB542488A GB7892/40A GB789240A GB542488A GB 542488 A GB542488 A GB 542488A GB 7892/40 A GB7892/40 A GB 7892/40A GB 789240 A GB789240 A GB 789240A GB 542488 A GB542488 A GB 542488A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ray
- plates
- electrode
- aperture
- deflection
- 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
- H01J29/52—Arrangements for controlling intensity of ray or beam, e.g. for modulation
-
- 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
- H01J29/70—Arrangements for deflecting ray or beam
- H01J29/72—Arrangements for deflecting ray or beam along one straight line or along two perpendicular straight lines
- H01J29/74—Deflecting by electric fields only
-
- 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
- H01J29/84—Traps for removing or diverting unwanted particles, e.g. negative ions, fringing electrons; Arrangements for velocity or mass selection
Landscapes
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
Abstract
542,488. Cathode-ray tubes. McGEE, J. D., MILLER, H., and FREEMAN, G. S. P. May 2, 1940, No. 7892. [Class 39 (i)] In a cathode-ray tube wherein the ray is subjected to a uniform longitudinal magnetic field as described in Specification 530,409, the ray is modulated by subjecting it to the action of an electrostatic field between deflecting electrodes, so that the deflected ray emerges substantially parallel to its original direction and is then interrupted by an electrode through an aperture in which it passes by an extent depending on the amount of deflection. Fig. 1 shows an arrangement in which the plate 10 has a wedge-shaped aperture 9 as shown in Fig. 2 and the ray is directed towards the apex of the wedge by the deflection produced by plates 7, 8. 5, 6 are plates for producing scanning deflection. The electrode 4, which acts as a stop for defining the ray, and the electrode 10 are preferably arranged as described in Specification 542,496. After the ray has passed through the aperture 19 it may be restored to its original line by a second pair of plates carrying potentials equal and opposite to those of the plates 7, 8. The ray may be centred between the electrodes 5, 6 by the means described in Specification 542,497. Fig. 7 shows an arrangement in which the ray is caused to be compacted to a greater or less extent into the plane of the lower edges of the plates 14 and more or less interrupted accordingly by an electrode with an aperture 16 through which the ray passages. Plates 17 diminish the fringing effect at the edges of the plates 14.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB233060X | 1940-05-02 | ||
GB290441X | 1941-04-29 | ||
GB10541X | 1941-05-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB542488A true GB542488A (en) | 1942-01-12 |
Family
ID=27253814
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5441/41A Expired GB542497A (en) | 1940-05-02 | 1940-05-02 | Improvements in or relating to electron discharge devices |
GB7892/40A Expired GB542488A (en) | 1940-05-02 | 1940-05-02 | Improvements in or relating to electron discharge devices |
GB5440/41A Expired GB542496A (en) | 1940-05-02 | 1940-05-02 | Improvements in or relating to electron discharge devices |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5441/41A Expired GB542497A (en) | 1940-05-02 | 1940-05-02 | Improvements in or relating to electron discharge devices |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5440/41A Expired GB542496A (en) | 1940-05-02 | 1940-05-02 | Improvements in or relating to electron discharge devices |
Country Status (4)
Country | Link |
---|---|
US (1) | US2302786A (en) |
CH (1) | CH233060A (en) |
FR (1) | FR907691A (en) |
GB (3) | GB542497A (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2551810A (en) * | 1947-07-09 | 1951-05-08 | Rca Corp | Deflection beam tube |
US2969478A (en) * | 1949-06-10 | 1961-01-24 | Sperry Rand Corp | Information storage system |
NL85805C (en) * | 1950-04-12 | |||
US2609516A (en) * | 1950-10-31 | 1952-09-02 | Rca Corp | Art of forming and utilizing electron-beams of noncircular cross section |
BE519629A (en) * | 1952-05-02 | |||
US2811668A (en) * | 1956-05-29 | 1957-10-29 | Gen Dynamics Corp | Electron beam deflection control system |
US2888606A (en) * | 1956-08-27 | 1959-05-26 | Rca Corp | Modulation control for cathode ray tubes |
FR1281982A (en) * | 1960-11-23 | 1962-01-19 | Csf | Deflection modulator for cathode ray tubes |
GB1087323A (en) * | 1964-05-22 | 1967-10-18 | English Electric Valve Co Ltd | Improvements in or relating to electron beam discharge tubes |
US4549113A (en) * | 1981-02-06 | 1985-10-22 | U.S. Philips Corporation | Low noise electron gun |
GB2137802B (en) * | 1983-01-27 | 1986-06-04 | Thor Cryogenics Ltd | Electron filter |
-
1940
- 1940-05-02 GB GB5441/41A patent/GB542497A/en not_active Expired
- 1940-05-02 GB GB7892/40A patent/GB542488A/en not_active Expired
- 1940-05-02 GB GB5440/41A patent/GB542496A/en not_active Expired
-
1941
- 1941-07-05 US US401132A patent/US2302786A/en not_active Expired - Lifetime
- 1941-08-18 FR FR907691D patent/FR907691A/en not_active Expired
- 1941-08-19 CH CH233060D patent/CH233060A/en unknown
Also Published As
Publication number | Publication date |
---|---|
GB542497A (en) | 1942-01-12 |
CH233060A (en) | 1944-06-30 |
FR907691A (en) | 1946-03-19 |
GB542496A (en) | 1942-01-12 |
US2302786A (en) | 1942-11-24 |
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