GB715284A - Improvements in cathodes and method of making them - Google Patents

Improvements in cathodes and method of making them

Info

Publication number
GB715284A
GB715284A GB29720/51A GB2972051A GB715284A GB 715284 A GB715284 A GB 715284A GB 29720/51 A GB29720/51 A GB 29720/51A GB 2972051 A GB2972051 A GB 2972051A GB 715284 A GB715284 A GB 715284A
Authority
GB
United Kingdom
Prior art keywords
caesium
tungsten
cathode
box
porous
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
GB29720/51A
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.)
Egyesuelt Izzolampa es Villamossagi Rt
Original Assignee
Egyesuelt Izzolampa es Villamossagi Rt
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 Egyesuelt Izzolampa es Villamossagi Rt filed Critical Egyesuelt Izzolampa es Villamossagi Rt
Publication of GB715284A publication Critical patent/GB715284A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/28—Dispenser-type cathodes, e.g. L-cathode

Abstract

715,284. Cathode materials and processing. EGYESULT IZZOLAMPA ES VILLAMOSSAGI R. T. Dec. 19, 1951 [Dec. 20, 1950], No. 29720/51. Class 39(1) A caesium and/or rubidium cathode has the active substance contained inside a closed box, of which at least part is of porous tungsten. The caesium may be introduced into the box inside a glass capsule, to be subsequently broken, or in the form of a caesium compound together with a metallic reducing agent; examples given are the chromate or tungstate with tungsten, and the fluoride or chloride with aluminium or iron. The box itself may be of nickel or chromium, with an open end which is closed by a plug of porous sintered tungsten, and may be blackened or ribbed outside. The liberated caesium diffuses slowly through the porous tungsten to the outside in a replenishing action, giving a long life. The use of such cathodes in stroboscope, flash, and fluorescent lamps, and in cold-cathode thyratrons, is mentioned.
GB29720/51A 1950-12-20 1951-12-19 Improvements in cathodes and method of making them Expired GB715284A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HU307121X 1950-12-20

Publications (1)

Publication Number Publication Date
GB715284A true GB715284A (en) 1954-09-08

Family

ID=10978741

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29720/51A Expired GB715284A (en) 1950-12-20 1951-12-19 Improvements in cathodes and method of making them

Country Status (3)

Country Link
CH (1) CH307121A (en)
DE (1) DE883936C (en)
GB (1) GB715284A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2304990A (en) * 1995-09-08 1997-03-26 Eev Ltd Switching arrangements
US5994850A (en) * 1995-09-08 1999-11-30 Eev Limited Switching arrangements wherein a cylindrical trigger electrode is arranged around a gap between an anode and cathode for establishing a discharge therebetween
US7474051B2 (en) 2003-01-17 2009-01-06 Hamamatsu Photonics K.K. Alkali metal generating agent, alkali metal generator, photoelectric surface, secondary electron emission surface, electron tube, method for manufacturing photoelectric surface, method for manufacturing secondary electron emission surface, and method for manufacturing electron tube
US7772771B2 (en) 2003-01-17 2010-08-10 Hamamatsu Photonics K.K. Alkali metal generating agent, alkali metal generator, photoelectric surface, secondary electron emission surface, electron tube, method for manufacturing photoelectric surface, method for manufacturing secondary electron emission surface, and method for manufacturing electron tube
US7842194B2 (en) 2004-11-24 2010-11-30 Saes Getters S.P.A. Dispensing system for alkali metals capable of releasing a high quantity of metals

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH659916A5 (en) * 1983-03-31 1987-02-27 Inst Radiotekh Elektron CATODE AND GAS DISCHARGE TUBES, DESIGNED ON THE BASIS OF THIS CATODE.

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2304990A (en) * 1995-09-08 1997-03-26 Eev Ltd Switching arrangements
GB2304990B (en) * 1995-09-08 1999-09-01 Eev Ltd Switching arrangements
US5994850A (en) * 1995-09-08 1999-11-30 Eev Limited Switching arrangements wherein a cylindrical trigger electrode is arranged around a gap between an anode and cathode for establishing a discharge therebetween
US7474051B2 (en) 2003-01-17 2009-01-06 Hamamatsu Photonics K.K. Alkali metal generating agent, alkali metal generator, photoelectric surface, secondary electron emission surface, electron tube, method for manufacturing photoelectric surface, method for manufacturing secondary electron emission surface, and method for manufacturing electron tube
US7772771B2 (en) 2003-01-17 2010-08-10 Hamamatsu Photonics K.K. Alkali metal generating agent, alkali metal generator, photoelectric surface, secondary electron emission surface, electron tube, method for manufacturing photoelectric surface, method for manufacturing secondary electron emission surface, and method for manufacturing electron tube
US7842194B2 (en) 2004-11-24 2010-11-30 Saes Getters S.P.A. Dispensing system for alkali metals capable of releasing a high quantity of metals

Also Published As

Publication number Publication date
DE883936C (en) 1953-07-23
CH307121A (en) 1955-05-15

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