GB803225A - Improvements in or relating to electron tubes having ceramic envelopes - Google Patents
Improvements in or relating to electron tubes having ceramic envelopesInfo
- Publication number
- GB803225A GB803225A GB24850/55A GB2485055A GB803225A GB 803225 A GB803225 A GB 803225A GB 24850/55 A GB24850/55 A GB 24850/55A GB 2485055 A GB2485055 A GB 2485055A GB 803225 A GB803225 A GB 803225A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pair
- metal rings
- rings
- cathode
- ceramic
- 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
- H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
- H01J19/28—Non-electron-emitting electrodes; Screens
- H01J19/32—Anodes
- H01J19/34—Anodes forming part of the envelope
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
- H01J2893/0002—Construction arrangements of electrode systems
- H01J2893/0003—Anodes forming part of vessel walls
Landscapes
- Ceramic Products (AREA)
Abstract
803,225. Thermionic valves. EITELMcCULLOUGH, Inc. Aug. 30, 1955 [Feb. 4, 1955], No. 24850/55. Class 39(1). A double-diode, -triode, -tetrode or -pentode comprises a generally cylindrical envelope having side and end walls, the side wall comprising metallised ceramic rings 1-5, 22 and 23 with a metal ring 6-9, 19 and 21 sandwiched between each adjacent pair of ceramic rings, metallic bonds uniting the ceramic and metal rings, a double cathode and heater structure comprising a pair of electron emitting cathode discs 13 and a common heater 16, opposite ends of the heater being connected to different ones of a first pair 7 and 8 of the metal rings, and a pair of conductive supports 14, one for each of the cathode discs 13, which supports extend inwardly from a second pair 6 and 9 of the metal rings, the first pair 7 and 8 of metal rings having terminal tabs H<SP>2</SP> and H<SP>1</SP> for the heater 16 and the second pair 6 and 9 of metal rings having terminal tabs K<SP>2</SP> and K<SP>1</SP> for the cathode discs 13, and the end walls 11, 12 of the envelope being of stamped-out dish-shaped copper discs forming anodes and having terminal tabs P<SP>2</SP> and P<SP>1</SP>. In the double-triode construction shown in Figs. 7 and 9 a pair of conductive supports 18 for the disc-shaped grids 17 extend inwardly from a third pair 19 and 21 of the metal rings, the grid supports being of conical shape and having nested in them the anodes 11, which are dished to form conical surfaces. The metal rings 19 and 21 have terminal tabs G<SP>2</SP> and G<SP>1</SP> for the grids 17. All the electrodes can be of slightly domed formation. The ceramic rings can be of alumina metallised by a molybdenum-manganese sintering process and the metal rings are about À020. inch thick or less and can be of copper. The ceramic and metal rings are brazed together using high temperature brazing alloys such as copper-gold, some of the parts preferably being first brazed together in subassemblies. The brazing material can be in the form of thin flat rings À005 in. thick. Flanges 24 and up-turned lips 26 are provided on the metal rings to facilitate assembly. The structure can be evacuated through an exhaust tubulation or the parts, held apart, can be placed in a vacuum furnace and outgassed, the cathode activated, and finally the parts brought together and the final brazing, e.g., with copper-silver alloy, effected in the vacuum furnace by radiant or induction heating methods. The cathode discs 13 can be of oxide-coated nickel and each cathode support 14 can comprise a number of, e.g., three, spaced wire rods. The heater 16 can be a coil of insulated wire of toroidal formation.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US803225XA | 1955-02-04 | 1955-02-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB803225A true GB803225A (en) | 1958-10-22 |
Family
ID=22156653
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB24850/55A Expired GB803225A (en) | 1955-02-04 | 1955-08-30 | Improvements in or relating to electron tubes having ceramic envelopes |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB803225A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110047806A (en) * | 2019-05-15 | 2019-07-23 | 江阴市赛英电子股份有限公司 | A kind of square ceramic shell and preparation process |
-
1955
- 1955-08-30 GB GB24850/55A patent/GB803225A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110047806A (en) * | 2019-05-15 | 2019-07-23 | 江阴市赛英电子股份有限公司 | A kind of square ceramic shell and preparation process |
CN110047806B (en) * | 2019-05-15 | 2023-12-08 | 江阴市赛英电子股份有限公司 | Square ceramic tube shell and preparation process thereof |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2585582A (en) | Electron gun | |
US2882116A (en) | Method of making electron tubes | |
US2644907A (en) | Electron tube | |
US2727177A (en) | Electrostatic lens system | |
US2740067A (en) | Ceramic vacuum tube | |
US2433813A (en) | Electric discharge tube | |
US2863074A (en) | Thermo-electric generator | |
US2441792A (en) | Stacked electrode assembly for electron discharge devices | |
GB803225A (en) | Improvements in or relating to electron tubes having ceramic envelopes | |
US2814750A (en) | Ceramic electron tube | |
US2880349A (en) | Ceramic electron tube | |
US2404803A (en) | Space discharge device | |
US3571478A (en) | Vacuum furnace | |
GB492983A (en) | Improvements in or relating to electron discharge valves | |
GB804572A (en) | Electron tube and socket therefor | |
US3004185A (en) | Electron tube | |
US2950411A (en) | Power tubes for operation at high frequencies | |
GB1464201A (en) | Electron tube grid structure | |
US2879429A (en) | High power electron tube | |
GB1159105A (en) | Improvements in or relating to Thermionic Cathodes for use in Electric Discharge Tubes | |
US2884553A (en) | Modular electron-discharge tube | |
GB952359A (en) | Brazing jig for electron tube fabrication | |
US3370196A (en) | Envelope geometry for a magnetically controllable field effect tube | |
US2866120A (en) | Method of making an electron tube | |
US1879514A (en) | Means for supporting the electrodes of thermionic devices |