GB809607A - Improvements in or relating to electron discharge devices - Google Patents

Improvements in or relating to electron discharge devices

Info

Publication number
GB809607A
GB809607A GB9796/56A GB979656A GB809607A GB 809607 A GB809607 A GB 809607A GB 9796/56 A GB9796/56 A GB 9796/56A GB 979656 A GB979656 A GB 979656A GB 809607 A GB809607 A GB 809607A
Authority
GB
United Kingdom
Prior art keywords
plate
catches
chamber
magnets
march
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
GB9796/56A
Inventor
James Dwyer Mcgee
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Publication of GB809607A publication Critical patent/GB809607A/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
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/50—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output
    • H01J31/503—Image-conversion or image-amplification tubes, i.e. having optical, X-ray, or analogous input, and optical output with an electromagnetic electron-optic system

Landscapes

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

Abstract

809,607. Processing cathodes. NATIONAL RESEARCH DEVELOPMENT CORPORATION. March 21, 1957 [March 29, 1956], No. 9796/56. Class 39(1). The formation of a photo-sensitive surface by condensation of caesium vapour on a cathode plate 4 is carried out in a vessel 1 having two chambers 2, 3 connected by way of an aperture in the metal member 5. The plate 4 is held securely against the flange 5 by catches 9 of magnetic material which are spring loaded by coil'springs 10 arranged in side tubes 11. Caesium vapour is introduced into the chamber 3 and condenses on the surface 6 of plate 4 but is substantially prevented from passing into chamber 2 and condensing on electrodes therein by a coating of collodial graphite on the abutting surfaces of plate 4 and flange 5. After suitable heat treatment the tube 12 is sealed off. The catches 9 are then released with the aid of the magnets 13 and the plate 4 is turned over by careful shaking of the tube so that the coated surface 6 faces into chamber 2 after which the magnets 13 are removed so that the catches re-engage the plate 4 thus holding the photo-cathode in its operative position.
GB9796/56A 1958-02-26 1956-03-29 Improvements in or relating to electron discharge devices Expired GB809607A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB6171/58A GB860551A (en) 1958-02-26 1958-02-26 Improvements in or relating to electron discharge devices

Publications (1)

Publication Number Publication Date
GB809607A true GB809607A (en) 1959-02-25

Family

ID=9809706

Family Applications (2)

Application Number Title Priority Date Filing Date
GB9796/56A Expired GB809607A (en) 1958-02-26 1956-03-29 Improvements in or relating to electron discharge devices
GB6171/58A Expired GB860551A (en) 1958-02-26 1958-02-26 Improvements in or relating to electron discharge devices

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB6171/58A Expired GB860551A (en) 1958-02-26 1958-02-26 Improvements in or relating to electron discharge devices

Country Status (3)

Country Link
US (1) US2899576A (en)
DE (1) DE1040139B (en)
GB (2) GB809607A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL236730A (en) * 1958-03-06
NL240623A (en) * 1958-07-02
NL253424A (en) * 1959-07-06
US3329853A (en) * 1965-06-16 1967-07-04 Rca Corp Image orthicon with cesium getter adjacent electron multiplier

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE695498C (en) * 1935-06-27 1940-08-26 Aeg Process for the production of photocathodes and fluorescent screens in a vacuum vessel
GB469079A (en) * 1936-01-15 1937-07-15 Hans Gerhard Lubszynski Improvements in or relating to electron discharge devices comprising photo-electrically-active electrodes
US2231698A (en) * 1938-06-10 1941-02-11 Rca Corp Electron multiplier
US2283413A (en) * 1940-08-03 1942-05-19 Robert J Cashman Phototube and method of manufacture
US2374287A (en) * 1941-11-19 1945-04-24 Westinghouse Electric & Mfg Co Photoelectric device

Also Published As

Publication number Publication date
DE1040139B (en) 1958-10-02
US2899576A (en) 1959-08-11
GB860551A (en) 1961-02-08

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