GB630710A - Improvements in or relating to magnetrons - Google Patents
Improvements in or relating to magnetronsInfo
- Publication number
- GB630710A GB630710A GB5004/47A GB500447A GB630710A GB 630710 A GB630710 A GB 630710A GB 5004/47 A GB5004/47 A GB 5004/47A GB 500447 A GB500447 A GB 500447A GB 630710 A GB630710 A GB 630710A
- Authority
- GB
- United Kingdom
- Prior art keywords
- straps
- magnetron
- capacity
- varied
- anode
- 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
- 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
- H01J25/58—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 a number of resonators; having a composite resonator, e.g. a helix
- H01J25/587—Multi-cavity magnetrons
-
- 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
- H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
- H01J23/18—Resonators
- H01J23/22—Connections between resonators, e.g. strapping for connecting resonators of a magnetron
Landscapes
- Microwave Tubes (AREA)
Abstract
630,710. Magnetrons. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. Feb. 20, 1947, No. 5004. Convention date, Nov. 4, 1944. [Class 39 (i)] A cavity magnetron, of the type provided with anode straps, has means whereby the capacity or capacities between the straps may be varied in order to tune the magnetron. Fig. 3 shows part of a cross-section of a magnetron with a grid 26 surrounding one end of the cathode 14 : this is used to control the number of electrons entering the space between the anode straps 23, 23a and hence the capacity between the straps. Fig. 6 shows a magnetron with straps in the form of cylinders 32 and the capacity between them is varied by insertion of a member 34, which is preferably a dielectric but may be a conductor. Movement of 34 is controlled by a knob 39, rotation of which causes the bellows 37 to contract or expand. In a modification using two cylindrical straps, Fig. 8 (not shown), auxiliary cathodes surrounded by grids are mounted on the. anode segments between the straps. Fig. 9 shows a magnetron using two series of straps 42, each strap connecting two segments. Dielectric members 46 are provided for varying the capacity and may be mounted on a ring 47 in the end space ; the ring 47 may be rotated by a lever 48 which is connected to the outside by a suitable vacuum sealing. In a modification the dielectric members are not used and the straps 42, Fig. 11, carry filaments 51 mounted on insulators 49. The temperature of the filaments controls their electron emission and hence the capacity between the straps. The Specification as open to inspection under Sect. 91 describes a further modification, similar to that shown in Fig. 6, wherein the magnetron has only one strap at the top, the other being at the bottom, and its capacity to earth is varied by moving a metallic plunger in and out. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US561890A US2530185A (en) | 1944-11-04 | 1944-11-04 | Electron discharge device |
Publications (1)
Publication Number | Publication Date |
---|---|
GB630710A true GB630710A (en) | 1949-10-19 |
Family
ID=24243920
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5004/47A Expired GB630710A (en) | 1944-11-04 | 1947-02-20 | Improvements in or relating to magnetrons |
Country Status (5)
Country | Link |
---|---|
US (1) | US2530185A (en) |
BE (1) | BE472353A (en) |
FR (1) | FR945030A (en) |
GB (1) | GB630710A (en) |
NL (1) | NL68023C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2226696A (en) * | 1988-12-19 | 1990-07-04 | Hitachi Ltd | Magnetron |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL104031C (en) * | 1953-07-24 | |||
US2840785A (en) * | 1954-06-29 | 1958-06-24 | Raytheon Mfg Co | Frequency modulated magnetrons |
US3875469A (en) * | 1972-12-20 | 1975-04-01 | Hitachi Ltd | Anode structure for magnetron |
GB9723478D0 (en) * | 1997-11-07 | 1998-01-07 | Eev Ltd | Magnetrons |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB445084A (en) * | 1934-08-21 | 1936-04-02 | Telefunken Gmbh | Improvements in or relating to electron discharge devices |
NL45040C (en) * | 1935-02-28 | |||
US2144222A (en) * | 1935-08-15 | 1939-01-17 | Telefunken Gmbh | Electron discharge device |
US2115521A (en) * | 1936-04-30 | 1938-04-26 | Telefunken Gmbh | Magnetron |
US2243829A (en) * | 1938-11-12 | 1941-06-03 | Rca Corp | Fixed plate variable capacity condenser |
US2241976A (en) * | 1940-04-25 | 1941-05-13 | Gen Electric | High frequency apparatus |
US2408235A (en) * | 1941-12-31 | 1946-09-24 | Raytheon Mfg Co | High efficiency magnetron |
FR954569A (en) * | 1943-02-02 | 1950-01-03 | ||
US2414084A (en) * | 1943-05-11 | 1947-01-14 | Bell Telephone Labor Inc | Tunable resonator and oscillator |
US2408903A (en) * | 1943-06-12 | 1946-10-08 | Sylvania Electric Prod | Ultra high frequency generator |
FR962864A (en) * | 1944-02-14 | 1950-06-22 | ||
US2414085A (en) * | 1944-12-14 | 1947-01-14 | Bell Telephone Labor Inc | Oscillator |
-
0
- BE BE472353D patent/BE472353A/xx unknown
- NL NL68023D patent/NL68023C/xx active
-
1944
- 1944-11-04 US US561890A patent/US2530185A/en not_active Expired - Lifetime
-
1947
- 1947-02-20 GB GB5004/47A patent/GB630710A/en not_active Expired
- 1947-04-11 FR FR945030D patent/FR945030A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2226696A (en) * | 1988-12-19 | 1990-07-04 | Hitachi Ltd | Magnetron |
GB2226696B (en) * | 1988-12-19 | 1993-06-23 | Hitachi Ltd | Magnetron |
Also Published As
Publication number | Publication date |
---|---|
NL68023C (en) | |
BE472353A (en) | |
FR945030A (en) | 1949-04-22 |
US2530185A (en) | 1950-11-14 |
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