GB702824A - Improvements relating to the manufacture of electrodes which are sensitised so as tobe emitters of photo-electrons or secondary electrons - Google Patents

Improvements relating to the manufacture of electrodes which are sensitised so as tobe emitters of photo-electrons or secondary electrons

Info

Publication number
GB702824A
GB702824A GB461650A GB461650A GB702824A GB 702824 A GB702824 A GB 702824A GB 461650 A GB461650 A GB 461650A GB 461650 A GB461650 A GB 461650A GB 702824 A GB702824 A GB 702824A
Authority
GB
United Kingdom
Prior art keywords
electrons
bismuth
photo
sensitised
tobe
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
GB461650A
Inventor
Alfred Herman Sommer
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
Priority to GB461650A priority Critical patent/GB702824A/en
Publication of GB702824A publication Critical patent/GB702824A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J40/00—Photoelectric discharge tubes not involving the ionisation of a gas
    • H01J40/02—Details
    • H01J40/04—Electrodes
    • H01J40/06—Photo-emissive cathodes

Landscapes

  • Electrodes Of Semiconductors (AREA)

Abstract

702,824. Cathode materials and processing. ELECTRIC & MUSICAL INDUSTRIES, Ltd. Feb. 21, 1951 [Feb. 23, 1950], No. 4616/50. Class 39(1) A photo-electric or secondary-electron-emitting electrode is prepared by coating a support with layers of bismuth, silver and bismuth and exposing the electrode to oxygen and alkali metal. The first bismuth layer on a transparent support may reduce the light transmission to 75 per cent, the first silver layer to 65, the second bismuth layer to 55 and a second silver layer to 50. Oxidation will restore transmission to 55 before application of caesium during baking. Superficial oxidation may be effected after the envelope has been cooled.
GB461650A 1950-02-23 1950-02-23 Improvements relating to the manufacture of electrodes which are sensitised so as tobe emitters of photo-electrons or secondary electrons Expired GB702824A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB461650A GB702824A (en) 1950-02-23 1950-02-23 Improvements relating to the manufacture of electrodes which are sensitised so as tobe emitters of photo-electrons or secondary electrons

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB461650A GB702824A (en) 1950-02-23 1950-02-23 Improvements relating to the manufacture of electrodes which are sensitised so as tobe emitters of photo-electrons or secondary electrons

Publications (1)

Publication Number Publication Date
GB702824A true GB702824A (en) 1954-01-27

Family

ID=9780531

Family Applications (1)

Application Number Title Priority Date Filing Date
GB461650A Expired GB702824A (en) 1950-02-23 1950-02-23 Improvements relating to the manufacture of electrodes which are sensitised so as tobe emitters of photo-electrons or secondary electrons

Country Status (1)

Country Link
GB (1) GB702824A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3023131A (en) * 1957-06-26 1962-02-27 Emi Ltd Method of forming a photo-emissive surface and coated article
US3254253A (en) * 1960-12-14 1966-05-31 Emi Ltd Photo-electrically sensitive devices

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3023131A (en) * 1957-06-26 1962-02-27 Emi Ltd Method of forming a photo-emissive surface and coated article
US3254253A (en) * 1960-12-14 1966-05-31 Emi Ltd Photo-electrically sensitive devices

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