GB820915A - Improvements in or relating to the manufacture of thermionic cathodes - Google Patents

Improvements in or relating to the manufacture of thermionic cathodes

Info

Publication number
GB820915A
GB820915A GB2965057A GB2965057A GB820915A GB 820915 A GB820915 A GB 820915A GB 2965057 A GB2965057 A GB 2965057A GB 2965057 A GB2965057 A GB 2965057A GB 820915 A GB820915 A GB 820915A
Authority
GB
United Kingdom
Prior art keywords
cathode
layer
suspension
sheet
binder
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
GB2965057A
Inventor
Eric Stanley Hall
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.)
Philips Components Ltd
Original Assignee
Mullard 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
Priority to FR1179378D priority Critical patent/FR1179378A/en
Priority to BE558059D priority patent/BE558059A/xx
Application filed by Mullard Ltd filed Critical Mullard Ltd
Priority to GB2965057A priority patent/GB820915A/en
Publication of GB820915A publication Critical patent/GB820915A/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
    • H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
    • H01J9/042—Manufacture, activation of the emissive part

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)

Abstract

820,915. Cathode materials and processing. MULLARD Ltd. May 5, 1958 [Sept. 20, 1957], No. 29650/57. Class 39(1). A cathode is provided with an alkaline earth metal carbonate coating by making a suspension of the carbonate in a binder solution, forming the suspension into a layer, drying said layer to produce a sheet or strip, compressing, and then adhering the sheet to the cathode body. A suitable resin may be used as the adherent, or alternatively the cathode may be wetted with a binder for the solvent, and then brought into contact with the sheet so that the latter wraps itself around the cathode. Suitable organic materials for constituting the binder, and the wetting solvent, are given. The layer of suspension may be formed by spreading over a glass plate, or a spinning disc, or alternatively by extrusion. The layer may be compressed between flat surfaces or between rollers, to a final thickness of about 50 microns. The carbonates may have a loading of powdered nickel, or other specified metals. Two specific examples are given. Specification 717,231 is referred to.
GB2965057A 1957-09-20 1957-09-20 Improvements in or relating to the manufacture of thermionic cathodes Expired GB820915A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR1179378D FR1179378A (en) 1957-09-20 1957-06-03 Process for applying layers of alkaline earth carbonates to cathode bodies and emissive cathodes produced according to this process
BE558059D BE558059A (en) 1957-09-20 1957-06-03
GB2965057A GB820915A (en) 1957-09-20 1957-09-20 Improvements in or relating to the manufacture of thermionic cathodes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2965057A GB820915A (en) 1957-09-20 1957-09-20 Improvements in or relating to the manufacture of thermionic cathodes

Publications (1)

Publication Number Publication Date
GB820915A true GB820915A (en) 1959-09-30

Family

ID=10294916

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2965057A Expired GB820915A (en) 1957-09-20 1957-09-20 Improvements in or relating to the manufacture of thermionic cathodes

Country Status (3)

Country Link
BE (1) BE558059A (en)
FR (1) FR1179378A (en)
GB (1) GB820915A (en)

Also Published As

Publication number Publication date
BE558059A (en) 1957-12-03
FR1179378A (en) 1959-05-22

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