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GB515371A - Improvements in the manufacture of valves having oxide-coated thermionic cathodes - Google Patents

Improvements in the manufacture of valves having oxide-coated thermionic cathodes

Info

Publication number
GB515371A
GB515371A GB1611438A GB1611438A GB515371A GB 515371 A GB515371 A GB 515371A GB 1611438 A GB1611438 A GB 1611438A GB 1611438 A GB1611438 A GB 1611438A GB 515371 A GB515371 A GB 515371A
Authority
GB
United Kingdom
Prior art keywords
valves
oxide
manufacture
thermionic cathodes
class
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
GB1611438A
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.)
MO Valve Co Ltd
Original Assignee
MO Valve Co 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 BE434475D priority Critical patent/BE434475A/xx
Application filed by MO Valve Co Ltd filed Critical MO Valve Co Ltd
Priority to GB1611438A priority patent/GB515371A/en
Priority to FR855142D priority patent/FR855142A/en
Publication of GB515371A publication Critical patent/GB515371A/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)
  • Laminated Bodies (AREA)
  • Sealing Material Composition (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

515,371. Thermionic valves ; oxide coated cathodes. M-O VALVE CO., Ltd., and BENJAMIN, M. May 30, 1938, No. 16114. [Class 39 (i)] [Also in Group XXXVI] Thermionic valves having oxide coated cathodes are prepared by using the carbonatecoated metal cores prepared as described in Specification 514,849 by depositing by cataphoresis, particles of alkaline metal carbonates having diameters between ¢ and 150 Á from a suspension in an organic liquid containing acetone and an organic binder. Specifications 325,317, [Class 39 (i)] and 444,723, [Group XXXVI], also are referred to.
GB1611438A 1938-05-30 1938-05-30 Improvements in the manufacture of valves having oxide-coated thermionic cathodes Expired GB515371A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE434475D BE434475A (en) 1938-05-30
GB1611438A GB515371A (en) 1938-05-30 1938-05-30 Improvements in the manufacture of valves having oxide-coated thermionic cathodes
FR855142D FR855142A (en) 1938-05-30 1939-05-22 Oxide Coated Thermionic Cathode Tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1611438A GB515371A (en) 1938-05-30 1938-05-30 Improvements in the manufacture of valves having oxide-coated thermionic cathodes

Publications (1)

Publication Number Publication Date
GB515371A true GB515371A (en) 1939-12-04

Family

ID=10071429

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1611438A Expired GB515371A (en) 1938-05-30 1938-05-30 Improvements in the manufacture of valves having oxide-coated thermionic cathodes

Country Status (3)

Country Link
BE (1) BE434475A (en)
FR (1) FR855142A (en)
GB (1) GB515371A (en)

Also Published As

Publication number Publication date
FR855142A (en) 1940-05-03
BE434475A (en)

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