GB499660A - Improvements in or relating to sensitive surfaces of low electronic work function and methods of manufacturing the same - Google Patents

Improvements in or relating to sensitive surfaces of low electronic work function and methods of manufacturing the same

Info

Publication number
GB499660A
GB499660A GB2062737A GB2062737A GB499660A GB 499660 A GB499660 A GB 499660A GB 2062737 A GB2062737 A GB 2062737A GB 2062737 A GB2062737 A GB 2062737A GB 499660 A GB499660 A GB 499660A
Authority
GB
United Kingdom
Prior art keywords
caesium
relating
manufacturing
methods
same
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
GB2062737A
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.)
Baird Television Ltd
Original Assignee
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 Baird Television Ltd filed Critical Baird Television Ltd
Priority to GB2062737A priority Critical patent/GB499660A/en
Publication of GB499660A publication Critical patent/GB499660A/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2201/00—Electrodes common to discharge tubes
    • H01J2201/32—Secondary emission electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2201/00—Electrodes common to discharge tubes
    • H01J2201/34—Photoemissive electrodes

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)

Abstract

499,660. Electrode materials. BAIRD TELEVISION, Ltd., and SOMMER, A. July 26, 1937, No. 20627. [Class 39 (i)] A photoelectrically sensitive and secondary electron emissive surface comprises a base member of oxidized metal carrying a photoelectrically sensitive layer of caesium or an under layer of another alkali metal. On an oxidized silver surface first rubidium and then caesium are deposited ; the surface thus formed is then oxidized until photo-electric sensitivity is substantially destroyed, and is finally heated to distil caesium to the surface. The oxidation and reheating may be repeated, as described in Specification 474,616.
GB2062737A 1937-07-26 1937-07-26 Improvements in or relating to sensitive surfaces of low electronic work function and methods of manufacturing the same Expired GB499660A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2062737A GB499660A (en) 1937-07-26 1937-07-26 Improvements in or relating to sensitive surfaces of low electronic work function and methods of manufacturing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2062737A GB499660A (en) 1937-07-26 1937-07-26 Improvements in or relating to sensitive surfaces of low electronic work function and methods of manufacturing the same

Publications (1)

Publication Number Publication Date
GB499660A true GB499660A (en) 1939-01-26

Family

ID=10149049

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2062737A Expired GB499660A (en) 1937-07-26 1937-07-26 Improvements in or relating to sensitive surfaces of low electronic work function and methods of manufacturing the same

Country Status (1)

Country Link
GB (1) GB499660A (en)

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