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GB643655A - Improvements in or relating to magnetron electron discharge devices - Google Patents

Improvements in or relating to magnetron electron discharge devices

Info

Publication number
GB643655A
GB643655A GB26426/46A GB2642646A GB643655A GB 643655 A GB643655 A GB 643655A GB 26426/46 A GB26426/46 A GB 26426/46A GB 2642646 A GB2642646 A GB 2642646A GB 643655 A GB643655 A GB 643655A
Authority
GB
United Kingdom
Prior art keywords
cathode
thoria
relating
bombardment
during manufacture
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
Application number
GB26426/46A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ALEXANDER RANGABE
AMHERST FELIX HOME THOMSON
GEORGE PAUL WRIGHT
Original Assignee
ALEXANDER RANGABE
AMHERST FELIX HOME THOMSON
GEORGE PAUL WRIGHT
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ALEXANDER RANGABE, AMHERST FELIX HOME THOMSON, GEORGE PAUL WRIGHT filed Critical ALEXANDER RANGABE
Priority to GB26426/46A priority Critical patent/GB643655A/en
Priority to US771734A priority patent/US2567624A/en
Publication of GB643655A publication Critical patent/GB643655A/en
Expired legal-status Critical Current

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

Landscapes

  • Microwave Tubes (AREA)

Abstract

643,655. Magnetrons. THOMSON, A. F. H., WRIGHT, G. P., RANGABE, A. R., and BUCKINGHAM, J. Sept. 3, 1946, No. 26426. [Class 39 (i)] The cathode 11 of a magnetron is heated by electron bombardment from a separate cathode 22, for emission during operation or for processing or for degassing during manufacture. The cathode is supported on a conical frustum 20 having an internal recess 29 into which the electron beam is directed. The frustum 20 also serves to radiate excess heat developed in the cathode by back-bombardment. Focusing may be by electrode 23 or by the magnetic field of polepieces 15, 16. The cathode 23 is in a separately evacuated space to avoid poisoning during manufacture. In modifications, the recess 29 extends right into the emissive portion of the cathode, which may be wholly of thoria joined to the end supports by graded seals or a tungsten core surrounded by a thoria sleeve, as in Specification 643,656.
GB26426/46A 1946-09-03 1946-09-03 Improvements in or relating to magnetron electron discharge devices Expired GB643655A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB26426/46A GB643655A (en) 1946-09-03 1946-09-03 Improvements in or relating to magnetron electron discharge devices
US771734A US2567624A (en) 1946-09-03 1947-09-02 Cathode arrangement for electron discharge devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB26426/46A GB643655A (en) 1946-09-03 1946-09-03 Improvements in or relating to magnetron electron discharge devices

Publications (1)

Publication Number Publication Date
GB643655A true GB643655A (en) 1950-09-27

Family

ID=10243447

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26426/46A Expired GB643655A (en) 1946-09-03 1946-09-03 Improvements in or relating to magnetron electron discharge devices

Country Status (2)

Country Link
US (1) US2567624A (en)
GB (1) GB643655A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3453480A (en) * 1966-03-29 1969-07-01 Siemens Ag Electron beam production system for electronic discharge vessels
US3474282A (en) * 1965-06-30 1969-10-21 Siemens Ag Electron gun for electron tubes in cathode heater device
US5045749A (en) * 1989-03-07 1991-09-03 Thomson Tubes Electroniques Electron beam generator and electronic devices using such a generator

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB668141A (en) * 1950-08-17 1952-03-12 British Thomson Houston Co Ltd Improvements relating to magnetrons
US2760097A (en) * 1950-12-22 1956-08-21 Westinghouse Electric Corp Cathode structures
US2849633A (en) * 1954-11-16 1958-08-26 Litton Industries Inc Magnetron
US2902653A (en) * 1955-02-18 1959-09-01 Emi Ltd Pulse generating circuits embodying magnetrons
US2900559A (en) * 1957-01-18 1959-08-18 John A Ruetz Double stream growing-wave amplifier
US3054015A (en) * 1959-10-03 1962-09-11 Nippon Electric Co Electron beam tube magnetic focusing device
US3130339A (en) * 1961-06-02 1964-04-21 Sylvania Electric Prod Cathode cooling for electron discharge devices
US3521113A (en) * 1966-05-23 1970-07-21 Ibm Electron beam apparatus incorporating a hollow pyramidal indirectly heated cathode member

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1309704A (en) * 1919-07-15 stoekle
US1419547A (en) * 1918-11-12 1922-06-13 Cornelius D Ehret Electronic apparatus
GB229019A (en) * 1923-11-22 1925-02-19 Amand Isidore Bernard Ghyssaer Electric discharge tubes
US2126894A (en) * 1933-05-04 1938-08-16 Telefunken Gmbh Indirectly heated cathode
GB453214A (en) * 1934-11-29 1935-06-11 Philips Nv Improvements in or relating to indirectly heated cathodes for electron discharge tubes
US2305781A (en) * 1937-10-08 1942-12-22 Helbig Adolf Vacuum electric apparatus
US2414785A (en) * 1942-01-29 1947-01-21 Sperry Gyroscope Co Inc High-frequency tube structure
US2435804A (en) * 1944-01-01 1948-02-10 Rca Corp Cavity resonator magnetron device
US2478534A (en) * 1944-12-13 1949-08-09 Raytheon Mfg Co Electron discharge device of the cavity resonator type
NL66078C (en) * 1946-02-12
BE473942A (en) * 1946-06-18

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3474282A (en) * 1965-06-30 1969-10-21 Siemens Ag Electron gun for electron tubes in cathode heater device
US3453480A (en) * 1966-03-29 1969-07-01 Siemens Ag Electron beam production system for electronic discharge vessels
US5045749A (en) * 1989-03-07 1991-09-03 Thomson Tubes Electroniques Electron beam generator and electronic devices using such a generator

Also Published As

Publication number Publication date
US2567624A (en) 1951-09-11

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