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GB670607A - Improvements in or relating to electron discharge devices employing secondary electron emission and electrodes for use therein - Google Patents

Improvements in or relating to electron discharge devices employing secondary electron emission and electrodes for use therein

Info

Publication number
GB670607A
GB670607A GB1610350A GB1610350A GB670607A GB 670607 A GB670607 A GB 670607A GB 1610350 A GB1610350 A GB 1610350A GB 1610350 A GB1610350 A GB 1610350A GB 670607 A GB670607 A GB 670607A
Authority
GB
United Kingdom
Prior art keywords
oxide
gold
relating
electrodes
magnesium
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
GB1610350A
Inventor
Cabot Seaton Bull
Albert Horace Atherton
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical 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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Publication of GB670607A publication Critical patent/GB670607A/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
    • H01J1/32—Secondary-electron-emitting electrodes

Landscapes

  • Discharge Lamp (AREA)

Abstract

670,607. Electrode materials. ELECTRIC & MUSICAL INDUSTRIES, Ltd. Oct. 26, 1946 [Nov. 7, 1945], No. 16103/50. Divided out of 670,561. Class 39 (i). A secondary electron emitting material comprises an oxide or oxides selected from the group magnesium oxide, aluminium oxide and beryllium oxide in which is dispersed a metal, e.g. gold, silver or copper, which is removed by electron bombardment when exposed thereto so that the selected oxide or oxides is continually exposed. The base of the electrode may comprise nickel, gold-plated molybdenum or platinum. Nickel is usually coated with magnesium to a thickness of 10<SP>-6</SP> inches. Magnesium oxide added to a colloidal suspension of gold in water is sprayed on to a thickness of at least 10<SP>-4</SP> inches, or magnesium oxide added to an oily suspension of gold is burnt on the base, the coating being afterwards formed at red heat in air. Specifications 601,966, 670,554 and 670,561 are referred to.
GB1610350A 1945-11-07 1945-11-07 Improvements in or relating to electron discharge devices employing secondary electron emission and electrodes for use therein Expired GB670607A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3180946A GB670561A (en) 1945-11-07 1945-11-07 Improvements in or relating to electron discharge devices employing secondary-electron emission and electrodes for use therein

Publications (1)

Publication Number Publication Date
GB670607A true GB670607A (en) 1952-04-23

Family

ID=10328741

Family Applications (2)

Application Number Title Priority Date Filing Date
GB3180946A Expired GB670561A (en) 1945-11-07 1945-11-07 Improvements in or relating to electron discharge devices employing secondary-electron emission and electrodes for use therein
GB1610350A Expired GB670607A (en) 1945-11-07 1945-11-07 Improvements in or relating to electron discharge devices employing secondary electron emission and electrodes for use therein

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB3180946A Expired GB670561A (en) 1945-11-07 1945-11-07 Improvements in or relating to electron discharge devices employing secondary-electron emission and electrodes for use therein

Country Status (1)

Country Link
GB (2) GB670561A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3117713A (en) * 1957-11-28 1964-01-14 Degussa Vacuum pump
US3308324A (en) * 1962-03-30 1967-03-07 Rca Corp Electron multiplier and method of manufacturing dynodes
CN113471034A (en) * 2021-05-29 2021-10-01 南京三乐集团有限公司 Preparation method of magnesium oxide secondary emitter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3117713A (en) * 1957-11-28 1964-01-14 Degussa Vacuum pump
US3308324A (en) * 1962-03-30 1967-03-07 Rca Corp Electron multiplier and method of manufacturing dynodes
CN113471034A (en) * 2021-05-29 2021-10-01 南京三乐集团有限公司 Preparation method of magnesium oxide secondary emitter
CN113471034B (en) * 2021-05-29 2023-11-14 南京三乐集团有限公司 Preparation method of magnesium oxide secondary emitter

Also Published As

Publication number Publication date
GB670561A (en) 1952-04-23

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