GB649619A - Improvements in or relating to magnetrons - Google Patents
Improvements in or relating to magnetronsInfo
- Publication number
- GB649619A GB649619A GB18247/48A GB1824748A GB649619A GB 649619 A GB649619 A GB 649619A GB 18247/48 A GB18247/48 A GB 18247/48A GB 1824748 A GB1824748 A GB 1824748A GB 649619 A GB649619 A GB 649619A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- magnetron
- july
- heater
- nickel wire
- 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
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/02—Electrodes; Magnetic control means; Screens
- H01J23/04—Cathodes
- H01J23/05—Cathodes having a cylindrical emissive surface, e.g. cathodes for magnetrons
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
- H01J25/50—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
- H01J25/52—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode
- H01J25/54—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode having only one cavity or other resonator, e.g. neutrode tubes
- H01J25/56—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode having only one cavity or other resonator, e.g. neutrode tubes with interdigital arrangements of anodes, e.g. turbator tube
Landscapes
- Microwave Tubes (AREA)
Abstract
649,619. Magnetrons. PATELHOLD PATENTVERWERTUNGS- & ELEKTROHOLDING AKT.-GES. July 7, 1948, No. 18247. Convention date, July 30, 1947. [Class 39 (i)] In a quarter-wave, cavity resonator, magnetron the circuit length of the part of the cathode and/or heater surrounded by the highfrequency magnetic field is made not less than the longest wave-length produced by the magnetron to reduce high-frequency currents in the cathode circuit. A directly heated cathode may be formed as a spiral, Fig. 2 (not shown), and may be overwound with nickel wire 52 covered with an emitting layer ; additional covering may be provided to increase the radiation at the hotter part in the centre of the cathode, Fig. 5. In an indirectly heated cathode the nickel wire may be wound round the ceramic insulator, Fig. 6 (not shown), or the cathode surface formed like a bellows 72, surrounding the heater 71, Fig. 7.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH649619X | 1947-07-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB649619A true GB649619A (en) | 1951-01-31 |
Family
ID=4526015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18247/48A Expired GB649619A (en) | 1947-07-30 | 1948-07-07 | Improvements in or relating to magnetrons |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE483959A (en) |
| CH (1) | CH260193A (en) |
| DE (1) | DE853030C (en) |
| FR (1) | FR969227A (en) |
| GB (1) | GB649619A (en) |
| NL (2) | NL141303B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2172426A (en) * | 1985-02-06 | 1986-09-17 | New Japan Radio Co Ltd | Cathodes for magnetrons |
-
0
- NL NL71691D patent/NL71691C/xx active
- BE BE483959D patent/BE483959A/xx unknown
- NL NL646414484A patent/NL141303B/en unknown
-
1947
- 1947-07-30 CH CH260193D patent/CH260193A/en unknown
-
1948
- 1948-07-07 GB GB18247/48A patent/GB649619A/en not_active Expired
- 1948-07-13 FR FR969227D patent/FR969227A/en not_active Expired
-
1949
- 1949-01-01 DE DEP28947A patent/DE853030C/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2172426A (en) * | 1985-02-06 | 1986-09-17 | New Japan Radio Co Ltd | Cathodes for magnetrons |
| GB2172426B (en) * | 1985-02-06 | 1989-06-14 | New Japan Radio Co Ltd | Cathode for magnetron |
Also Published As
| Publication number | Publication date |
|---|---|
| CH260193A (en) | 1949-02-28 |
| DE853030C (en) | 1952-10-20 |
| FR969227A (en) | 1950-12-15 |
| NL141303B (en) | |
| BE483959A (en) | |
| NL71691C (en) |
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