GB811143A - Improvements in or relating to electron discharge devices - Google Patents

Improvements in or relating to electron discharge devices

Info

Publication number
GB811143A
GB811143A GB2240254A GB2240254A GB811143A GB 811143 A GB811143 A GB 811143A GB 2240254 A GB2240254 A GB 2240254A GB 2240254 A GB2240254 A GB 2240254A GB 811143 A GB811143 A GB 811143A
Authority
GB
United Kingdom
Prior art keywords
electrode
evaporator
loop
electrodes
loops
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
GB2240254A
Inventor
Sydney Charles Dowden
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 GB2240254A priority Critical patent/GB811143A/en
Priority to DEE11003A priority patent/DE1034278B/en
Publication of GB811143A publication Critical patent/GB811143A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
    • 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

Abstract

811,143. Coating by vapour deposition. ELECTRIC & MUSICAL INDUSTRIES Ltd. July 7, 1955 [July 31, 1954], No. 22402/54. Class 82(2) [Also in Group XL(a)] A discharge device, particularly a multistage multiplier, has a conducting electrode 4 and a conducting evaporator 9 extending across the electrode, wherein one end 11 of the evaporator 9, e.g. of tape form coated with antimony, is connected to the electrode, at a point near its perimeter and its other end is connected to one end of a conducting loop 10 disposed outside the perimeter of the electrode with the other end 12 of the loop connected to the electrode, the evaporator, electrode, and loop being in series, and the loop lying in a plane which is differnt from e.g. perpendicular to the plane of the electrode whereby by inducing currents into the loop 10 the evaporator 9 is raised to evaporating temperature to cause material to be deposited on the electrode 4 whilst the electrode surface remains at a temperature substantially lower than the evaporating temperature. A multi-stage multiplier has several electrodes 4, each electrode comprisnig a wire mesh 8 and a series of spaced inclined slats 6 to be covered with the evaporated material, the loops 10 of alternate electrodes being on opposite sides of the electrodes. An external H.F. coil is first positioned adjacent the loops 10 of the second and fourth electrodes 4 to cause evaporation thereon and then adjacent the third and fifth loops. Active material for the first electrode 4 and the photo-cathode 2 is deposited from a ring evaporator 13. The photo-cathode and all the electrodes 4 are afterwards sensitized with caesium.
GB2240254A 1954-07-31 1954-07-31 Improvements in or relating to electron discharge devices Expired GB811143A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2240254A GB811143A (en) 1954-07-31 1954-07-31 Improvements in or relating to electron discharge devices
DEE11003A DE1034278B (en) 1954-07-31 1955-07-15 Evaporation device for the production of an electron-emitting surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2240254A GB811143A (en) 1954-07-31 1954-07-31 Improvements in or relating to electron discharge devices

Publications (1)

Publication Number Publication Date
GB811143A true GB811143A (en) 1959-04-02

Family

ID=10178787

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2240254A Expired GB811143A (en) 1954-07-31 1954-07-31 Improvements in or relating to electron discharge devices

Country Status (2)

Country Link
DE (1) DE1034278B (en)
GB (1) GB811143A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4125793A (en) * 1977-02-01 1978-11-14 Dumont Electron Tubes & Devices Corporation Photomultiplier with dynode support structure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4009334C2 (en) * 1990-03-23 2000-11-23 Perkin Elmer Bodenseewerk Zwei Illumination arrangement for applying a photomultiplier to a two-beam photometer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4125793A (en) * 1977-02-01 1978-11-14 Dumont Electron Tubes & Devices Corporation Photomultiplier with dynode support structure

Also Published As

Publication number Publication date
DE1034278B (en) 1958-07-17

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