GB453223A - Improvements in or relating to cathode ray tubes, preferably for television purposes - Google Patents
Improvements in or relating to cathode ray tubes, preferably for television purposesInfo
- Publication number
- GB453223A GB453223A GB35313/34A GB3531334A GB453223A GB 453223 A GB453223 A GB 453223A GB 35313/34 A GB35313/34 A GB 35313/34A GB 3531334 A GB3531334 A GB 3531334A GB 453223 A GB453223 A GB 453223A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cylinder
- cathode
- diaphragm
- electron
- plate
- 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
- H01J29/58—Arrangements for focusing or reflecting ray or beam
- H01J29/62—Electrostatic lenses
- H01J29/622—Electrostatic lenses producing fields exhibiting symmetry of revolution
- H01J29/624—Electrostatic lenses producing fields exhibiting symmetry of revolution co-operating with or closely associated to an electron gun
Landscapes
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Electrodes For Cathode-Ray Tubes (AREA)
Abstract
453,223. Cathode-ray tubes. RADIOAKT.-GES. D. S. LOEWE, 10, Wiesenweg, Steglitz, Berlin. Dec. 8, 1934, No. 35313. Convention date, Dec. 9, 1933. [Class 39 (i)] An electron - optical lens comprises two cylinders 1, 2, Figs. 1-4, or two pairs of plates, between which is arranged an apertured diaphragm 3, and a concentrating or dispersing lens with acceleration or retardation is obtained by connecting the diaphragm to either of the cylinders &c. which are connected to different positive potentials with respect to the cathode. In an amplifying tube, in which the anode current is controlled by deflection, the lens comprises pairs of plates which are supplemented by metallic members to form boxes. A cathode-ray tube for television comprises a diaphragm 4, Fig. 5, the aperture in which is reproduced on a luminescent screen 5 by means of a dispersing lens formed by plate 18 and cylinders 10, 11 and a concentrating lens formed by the cylinder 11 and the apertured plate 6. The cylinder 10 is connected to the diaphragm 4 and the cylinder 11 is maintained at a positive potential which is greater than that on the cylinder 10 but less than that on the plate 6. In another form, the plate 18 is connected to the cylinder 11 the positive potential on which is lower that that on the cylinder 10. The cathode may comprise a ground metal member into which a spot of electron-emitting oxide is sunk. A control grid and an anode are arranged near to the cathode and the electron beam is concentrated on to the aperture in the diaphragm 4 by the use of electronoptical systems which are shown in Figs. 1-4 or are described in Specification 442,511 or 453,270. One of the members of the system may be connected to the anode. The electrodes of the tube may be assembled by means described in Specification 435,382. Collars may be used to mount the electrodes on glass rods which may be hollow to house the leading-in wires. The Specification as open to inspection under Sect. 91 describes also an electron-optical system which is described in Specification 453,270. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE215764X | 1933-12-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB453223A true GB453223A (en) | 1936-09-08 |
Family
ID=5825664
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19201/36A Expired GB453270A (en) | 1933-12-09 | 1934-12-08 | Improvements in or relating to cathode ray tubes, preferably for television purposes |
| GB35313/34A Expired GB453223A (en) | 1933-12-09 | 1934-12-08 | Improvements in or relating to cathode ray tubes, preferably for television purposes |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19201/36A Expired GB453270A (en) | 1933-12-09 | 1934-12-08 | Improvements in or relating to cathode ray tubes, preferably for television purposes |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2226107A (en) |
| BE (1) | BE406706A (en) |
| CH (1) | CH215764A (en) |
| FR (1) | FR45657E (en) |
| GB (2) | GB453270A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2436833A (en) * | 1942-06-15 | 1948-03-02 | Int Standard Electric Corp | High density beam tube |
| US2792515A (en) * | 1951-06-22 | 1957-05-14 | Thomas Electrics Inc | Cathode ray tube |
| US2597363A (en) * | 1951-06-29 | 1952-05-20 | Ibm | Cathode-ray storage tube |
| US2769115A (en) * | 1951-08-20 | 1956-10-30 | Russell J Callender | Method and means for producing high degree television picture brilliance |
| US2919378A (en) * | 1953-02-18 | 1959-12-29 | Loewe Opta Ag | Static electronic lens for electron beam valves |
| US2911563A (en) * | 1957-04-24 | 1959-11-03 | Westinghouse Electric Corp | Electrostatic lens and deflection system |
| US3863091A (en) * | 1972-12-29 | 1975-01-28 | Hitachi Ltd | Electron gun assembly with improved unitary lens system |
-
0
- BE BE406706D patent/BE406706A/xx unknown
-
1934
- 1934-12-04 CH CH215764D patent/CH215764A/en unknown
- 1934-12-05 US US756126A patent/US2226107A/en not_active Expired - Lifetime
- 1934-12-08 FR FR45657D patent/FR45657E/en not_active Expired
- 1934-12-08 GB GB19201/36A patent/GB453270A/en not_active Expired
- 1934-12-08 GB GB35313/34A patent/GB453223A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB453270A (en) | 1936-09-08 |
| US2226107A (en) | 1940-12-24 |
| FR45657E (en) | 1935-11-13 |
| CH215764A (en) | 1941-07-15 |
| BE406706A (en) |
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