[go: up one dir, main page]

GB1189940A - Magnetron Cathodes - Google Patents

Magnetron Cathodes

Info

Publication number
GB1189940A
GB1189940A GB51710/68A GB5171068A GB1189940A GB 1189940 A GB1189940 A GB 1189940A GB 51710/68 A GB51710/68 A GB 51710/68A GB 5171068 A GB5171068 A GB 5171068A GB 1189940 A GB1189940 A GB 1189940A
Authority
GB
United Kingdom
Prior art keywords
thermal
activated portion
magnetron cathodes
magnetrons
rhenium
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
GB51710/68A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1189940A publication Critical patent/GB1189940A/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

1,189,940. Magnetrons. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 31 Oct., 1968 [3 Nov., 1967], No. 51710/68. Heading H1D. The activated portion 3 of a magnetron cathode consists of a porous tungsten cylinder impregnated with barium calcium aluminate, fitting over a molybdenum tube 1, and held in place by rings 4 and 5, which are of graphite to reduce both thermal and secondary emission. The activated portion 3 may be coated with osmium, indium, ruthenium, or rhenium, to increase the thermal emission therefrom.
GB51710/68A 1967-11-03 1968-10-31 Magnetron Cathodes Expired GB1189940A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL676714947A NL153370B (en) 1967-11-03 1967-11-03 MICROWAVE IN WHICH THE ACTIVATED PART OF THE CATHODE IS ENCLOSED BETWEEN RINGS WHOSE SURFACE CONTACTS THERMAL EMISSIONS.

Publications (1)

Publication Number Publication Date
GB1189940A true GB1189940A (en) 1970-04-29

Family

ID=19801629

Family Applications (1)

Application Number Title Priority Date Filing Date
GB51710/68A Expired GB1189940A (en) 1967-11-03 1968-10-31 Magnetron Cathodes

Country Status (5)

Country Link
US (1) US3555334A (en)
DE (1) DE1803348A1 (en)
FR (1) FR1591244A (en)
GB (1) GB1189940A (en)
NL (1) NL153370B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2166562A5 (en) * 1971-12-30 1973-08-17 Hitachi Ltd
JPS50129763A (en) * 1974-04-02 1975-10-14
US4349424A (en) * 1981-05-15 1982-09-14 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Ion sputter textured graphite

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1897933A (en) * 1928-08-02 1933-02-14 Peoples Gas By Products Corp Electrode for electron discharge tubes and method of forming the same
US2683671A (en) * 1952-07-17 1954-07-13 Westinghouse Electric Corp Low primary and secondary electron emission surface
US3308329A (en) * 1962-11-23 1967-03-07 Litton Industries Inc Thermionic emissive cathode with end structure for emissive suppression

Also Published As

Publication number Publication date
DE1803348A1 (en) 1969-06-19
NL153370B (en) 1977-05-16
FR1591244A (en) 1970-04-27
NL6714947A (en) 1969-05-06
US3555334A (en) 1971-01-12

Similar Documents

Publication Publication Date Title
GB716412A (en) Improvements in cylindrical cathodes
CA940999A (en) Discharge lamp thermionic cathode containing emission material
GB949151A (en) Cold emission point type cathodes
GB1457798A (en) Cathode-ray tube
GB987483A (en) A cathode for a high-pressure discharge lamp
GB1189940A (en) Magnetron Cathodes
GB1193864A (en) Improvements relating to Low-Pressure Mercury-Vapour Discharge Lamps
GB1141495A (en) Improvements in or relating to magnetrons
GB1209078A (en) Improvements in or relating to thermionic dispenser cathodes
GB1100420A (en) Improvements in thermionic valves
GB1281913A (en) A structure for providing controllable electron emission
CA940996A (en) Electron gun having a segmented anode electrode
GB1389620A (en) Discharge tube provided with an electrode comprising nickel and aluminium
GB924595A (en) Method of manufacturing cathodes
GB1069102A (en) Improvements in or relating to cathodes for use in electric discharge tubes
GB1337232A (en) Anodes for rotary anode x-ray tubes and rotary anode x-ray tubes including such anodes
GB1133240A (en) Improvements in or relating to low pressure mercury-vapour discharge lamps
GB829339A (en) Improvements in or relating to equipotential cathodes for electric discharge tubes and discharge tubes containing such cathodes
GB1421406A (en) Gas discharge lamp
GB1070377A (en) Improvements in or relating to thermionic cathodes and to electron discharge devices employing thermionic cathodes
GB1159634A (en) Ion Source
GB1034080A (en) Improvements in or relating to high pressure metal vapour electric discharge lamps and electrodes therefor
GB1034655A (en) Improvements relating to electron-emissive cathodes
GB1177590A (en) Improvements in or relating to Indirectly-Heated Dispenser Cathodes.
GB1049625A (en) Improvements in or relating to electron discharge devices

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee