GB965883A - Improved cathode ray tube - Google Patents
Improved cathode ray tubeInfo
- Publication number
- GB965883A GB965883A GB19443/63A GB1944363A GB965883A GB 965883 A GB965883 A GB 965883A GB 19443/63 A GB19443/63 A GB 19443/63A GB 1944363 A GB1944363 A GB 1944363A GB 965883 A GB965883 A GB 965883A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- aperture
- control electrode
- oxide
- insulation
- 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
- H01J29/485—Construction of the gun or of parts thereof
Landscapes
- Electrodes For Cathode-Ray Tubes (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Abstract
965,883. Cathode-ray tubes. RAULAND CORPORATION. May 16, 1963 [May 17, 1962], No. 19443/63. Heading H1D. In a high transconductance electron gun, e.g. for use in a television receiver, in which the control electrode 20, Fig. 2, has an aperture 31 small relative to the emitting surface of the cathode 19 and has a spacing from the cathode which is smaller than the thickness of the control electrode at the aperture, the cathodecontrol electrode space is filled with insulating material 34 except for a region 35 of diameter not less than 1.05 times the diameter of the aperture in order to avoid disturbing effects due to surface charges. The insulation may be a coating on the control electrode, an apertured cup placed over the closed end of the cathode, a ring-shaped insulator of mica or steatite or a protrusion on the cathode formed by spraying on several layers of insulation while masking off the central emitting area. A mesh grid may be fitted across the aperture as at 33 in Fig. 6 where a ring-shaped insulator 39 is formed on the shoulder 43 of a cathode which has a protruding central area 41. The insulator is preferably made of spongy or porous material, e.g. of aluminium oxide, magnesium oxide, barium oxide, zironium oxide or titanium dioxide, to minimize heat loss. Specification 874,212 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US195566A US3278779A (en) | 1962-05-17 | 1962-05-17 | Cathode-ray tube having an insulating spacer between the cathode and the control grid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB965883A true GB965883A (en) | 1964-08-06 |
Family
ID=22721899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19443/63A Expired GB965883A (en) | 1962-05-17 | 1963-05-16 | Improved cathode ray tube |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3278779A (en) |
| GB (1) | GB965883A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0048510A1 (en) * | 1980-09-19 | 1982-03-31 | Koninklijke Philips Electronics N.V. | Cathode ray tube |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3396297A (en) * | 1966-05-31 | 1968-08-06 | Sylvania Electric Prod | Multiple electron gun structure for cathode ray tube |
| US3500110A (en) * | 1967-08-23 | 1970-03-10 | Raytheon Co | Noncurrent intercepting electron beam control element |
| US3617793A (en) * | 1968-10-19 | 1971-11-02 | Okaya Electric Industry Co | Electrode mounting structure for providing insulation |
| US4096406A (en) * | 1976-05-10 | 1978-06-20 | Varian Associates, Inc. | Thermionic electron source with bonded control grid |
| NL8002037A (en) * | 1979-07-12 | 1981-01-14 | Philips Nv | APPARATUS INCLUDING A TELEVISION ROOM TUBE AND TELEVISION ROOM TUBE FOR SUCH A DEVICE. |
| US4413203A (en) * | 1980-04-14 | 1983-11-01 | North American Philips Consumer Electronics Corp. | Cathode-G1 spacing material and method of application |
| AU2002366886A1 (en) * | 2001-12-20 | 2003-07-09 | Koninklijke Philips Electronics N.V. | Cathode ray tube and electron gun |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB476830A (en) * | 1936-09-04 | 1937-12-16 | Gen Electric Co Ltd | Improvements in or relating to cathode ray tubes and the like |
| US2735032A (en) * | 1952-10-09 | 1956-02-14 | bradley | |
| US2712087A (en) * | 1954-10-19 | 1955-06-28 | Plural beam electron discharge devices | |
| US3008064A (en) * | 1957-10-28 | 1961-11-07 | Rauland Corp | Cathode-ray tube |
-
1962
- 1962-05-17 US US195566A patent/US3278779A/en not_active Expired - Lifetime
-
1963
- 1963-05-16 GB GB19443/63A patent/GB965883A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0048510A1 (en) * | 1980-09-19 | 1982-03-31 | Koninklijke Philips Electronics N.V. | Cathode ray tube |
Also Published As
| Publication number | Publication date |
|---|---|
| US3278779A (en) | 1966-10-11 |
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