GB474834A - Improvements in or relating to electron discharge devices - Google Patents

Improvements in or relating to electron discharge devices

Info

Publication number
GB474834A
GB474834A GB1330136A GB1330136A GB474834A GB 474834 A GB474834 A GB 474834A GB 1330136 A GB1330136 A GB 1330136A GB 1330136 A GB1330136 A GB 1330136A GB 474834 A GB474834 A GB 474834A
Authority
GB
United Kingdom
Prior art keywords
electrode
hydride
metal
hydrogen
vacuo
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
GB1330136A
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.)
EDWARD BOLTON KING
Baird Television Ltd
Original Assignee
EDWARD BOLTON KING
Baird Television 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 EDWARD BOLTON KING, Baird Television Ltd filed Critical EDWARD BOLTON KING
Priority to GB1330136A priority Critical patent/GB474834A/en
Publication of GB474834A publication Critical patent/GB474834A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/12—Manufacture of electrodes or electrode systems of photo-emissive cathodes; of secondary-emission electrodes
    • H01J9/125—Manufacture of electrodes or electrode systems of photo-emissive cathodes; of secondary-emission electrodes of secondary emission electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2201/00—Electrodes common to discharge tubes
    • H01J2201/32—Secondary emission electrodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

474,834. Electrode materials. BAIRD TELEVISION, Ltd., and KING, E. B. May 11, 1936, No. 13301. [Class 39 (i)] A secondary electron-emitting surface of a metallic hydride is produced on an electrode by enclosing the electrode in an envelope and admitting hydrogen to form the required hydride. Metals of the second and third groups of the periodic table may be used. Metal electrodes may be degassed in vacuo and treated with hydrogen, the formation of hydride being produced by heat or by an electric discharge between the electrode and another electrode within the envelope. The metal of the hydride, for example, potassium or caesium, may be evaporated in vacuo or, for example, in the case of copper, it may be sputtered on to an electrode of another metal, and the thickness of the layer of hydride may be regulated by controlling the temperature or stopping the discharge current. The electrode may be treated with hydrogen in the discharge tube itself or in a separate vessel. The Provisional Specification refers to the formation of secondary electron-emitting surfaces by covering electrodes consisting in the main of metal or other substances with thin layers of non- metallic substances in general.
GB1330136A 1936-05-11 1936-05-11 Improvements in or relating to electron discharge devices Expired GB474834A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1330136A GB474834A (en) 1936-05-11 1936-05-11 Improvements in or relating to electron discharge devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1330136A GB474834A (en) 1936-05-11 1936-05-11 Improvements in or relating to electron discharge devices

Publications (1)

Publication Number Publication Date
GB474834A true GB474834A (en) 1937-11-09

Family

ID=10020458

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1330136A Expired GB474834A (en) 1936-05-11 1936-05-11 Improvements in or relating to electron discharge devices

Country Status (1)

Country Link
GB (1) GB474834A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE895629C (en) * 1940-07-31 1953-11-05 Zeiss Ikon Ag Process for the manufacture of secondary emission cathodes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE895629C (en) * 1940-07-31 1953-11-05 Zeiss Ikon Ag Process for the manufacture of secondary emission cathodes

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