GB975023A - Cathode grid assembly for electron gun - Google Patents
Cathode grid assembly for electron gunInfo
- Publication number
- GB975023A GB975023A GB34612/61A GB3461261A GB975023A GB 975023 A GB975023 A GB 975023A GB 34612/61 A GB34612/61 A GB 34612/61A GB 3461261 A GB3461261 A GB 3461261A GB 975023 A GB975023 A GB 975023A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- shield
- secured
- supported
- glass rods
- 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
- 239000011521 glass Substances 0.000 abstract 4
- 239000000463 material Substances 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 abstract 2
- 230000008021 deposition Effects 0.000 abstract 1
- 238000010894 electron beam technology Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
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)
Abstract
975,023. Electron beam apparatus. RADIO CORPORATION OF AMERICA. Sept. 27, 1961 [Nov. 14, 1960], No. 34612/61. Heading H1D. An electron gun comprises an elongated tubular cathode 17 having one end closed and coated with electron - emissive material, a tubular shield 52 coaxially surrounding the cathode and secured to the other end of the cathode, and a control grid cup 18 coaxially surrounding the shield 52 with its open end extending towards the secured ends of the cathode and shield. The control grid 18 and cathodeshield assembly are independently supported from an elongated insulating element 16. As shown, the gun electrodes are supported from glass rods 16 by pairs of U-shaped metal elements 27-32, the cathode heater being supported by straps 34 also embedded in glass rods 16. The cathode is secured to shield 52 by a thin metal ring 56, and electrical connection to the cathode is made via support element 27, to minimize heatloss from the cathode. Shield 52 extends into the grid cup sufficiently far to prevent deposition on glass rods 16 of material evaporated from the cathode. The gun is supported between lead-ins 15 and spring fingers 35 and also includes a getter ring 36. During manufacture, grid cup 18 and shield 52 are secured to glass rods 16 before the cathode is mounted within shield 52, and the grid-cathode spacing is measured by a capacitance bridge technique.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US68977A US3145318A (en) | 1960-11-14 | 1960-11-14 | Cathode grid assembly for electron gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB975023A true GB975023A (en) | 1964-11-11 |
Family
ID=22085913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB34612/61A Expired GB975023A (en) | 1960-11-14 | 1961-09-27 | Cathode grid assembly for electron gun |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3145318A (en) |
| BE (1) | BE610243A (en) |
| DE (1) | DE1214796B (en) |
| GB (1) | GB975023A (en) |
| NL (1) | NL271321A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE634598A (en) * | 1962-07-06 | |||
| US3333138A (en) * | 1965-01-11 | 1967-07-25 | Rauland Corp | Support assembly for a low-wattage cathode |
| US4559468A (en) * | 1982-06-25 | 1985-12-17 | Raytheon Company | Cathode ray tube gun support |
| US4554480A (en) * | 1983-11-29 | 1985-11-19 | Rca Corporation | Cathode-ray tube having an electron gun assembly with emissivity modifying means |
| US4514660A (en) * | 1983-11-29 | 1985-04-30 | Rca Corporation | Cathode-ray tube having an electron gun assembly with a bimetal cathode eyelet structure |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2081942A (en) * | 1933-06-16 | 1937-06-01 | Harry R Lubcke | Cathode ray tube |
| US2383751A (en) * | 1942-05-07 | 1945-08-28 | Int Standard Electric Corp | Electron lens |
| US2510267A (en) * | 1946-10-30 | 1950-06-06 | Rca Corp | Grid cathode assembly for cathoderay tubes |
| DE1005201B (en) * | 1953-05-06 | 1957-03-28 | Telefunken Gmbh | Holder for the indirectly heated cathode of an electrical discharge tube, in particular an electron beam tube |
| DE1738685U (en) * | 1956-11-21 | 1957-01-31 | Gen Electric | BRACKET FOR THE INDIRECTLY HEATED CATHODE OF AN ELECTRIC DISCHARGE TUBE, IN PARTICULAR AN ELECTRON BEAM TUBE. |
| GB827557A (en) * | 1957-07-29 | 1960-02-10 | Pye Ltd | Improvements in or relating to cathodes for electron guns of cathode ray tubes |
| US2914694A (en) * | 1957-10-04 | 1959-11-24 | Rca Corp | Cathode assembly |
-
0
- NL NL271321D patent/NL271321A/xx unknown
-
1960
- 1960-11-14 US US68977A patent/US3145318A/en not_active Expired - Lifetime
-
1961
- 1961-09-27 GB GB34612/61A patent/GB975023A/en not_active Expired
- 1961-11-11 DE DER31443A patent/DE1214796B/en active Pending
- 1961-11-13 BE BE610243A patent/BE610243A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1214796B (en) | 1966-04-21 |
| NL271321A (en) | |
| BE610243A (en) | 1962-03-01 |
| US3145318A (en) | 1964-08-18 |
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