GB725450A - Improvements in or relating to methods of making electric discharge tubes - Google Patents

Improvements in or relating to methods of making electric discharge tubes

Info

Publication number
GB725450A
GB725450A GB7760/53A GB776053A GB725450A GB 725450 A GB725450 A GB 725450A GB 7760/53 A GB7760/53 A GB 7760/53A GB 776053 A GB776053 A GB 776053A GB 725450 A GB725450 A GB 725450A
Authority
GB
United Kingdom
Prior art keywords
per cent
barium zirconate
nitrocellulose
march
mol
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
GB7760/53A
Other languages
English (en)
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 Electrical Industries Ltd
Original Assignee
Philips Electrical 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB725450A publication Critical patent/GB725450A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/14—Solid thermionic cathodes characterised by the material
    • H01J1/142—Solid thermionic cathodes characterised by the material with alkaline-earth metal oxides, or such oxides used in conjunction with reducing agents, as an emissive material
    • 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)
  • Discharge Lamp (AREA)
GB7760/53A 1952-03-24 1953-03-20 Improvements in or relating to methods of making electric discharge tubes Expired GB725450A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL314779X 1952-03-24

Publications (1)

Publication Number Publication Date
GB725450A true GB725450A (en) 1955-03-02

Family

ID=19783766

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7760/53A Expired GB725450A (en) 1952-03-24 1953-03-20 Improvements in or relating to methods of making electric discharge tubes

Country Status (7)

Country Link
BE (1) BE518639A (de)
CH (1) CH314779A (de)
DE (1) DE974888C (de)
FR (1) FR1073725A (de)
GB (1) GB725450A (de)
IT (1) IT500462A (de)
NL (1) NL168358C (de)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL24414C (de) * 1926-06-09
DE572700C (de) * 1926-06-09 1933-03-22 Friedrich Meyer Dr Gluehkathode fuer Entladungsgefaesse
CH128076A (de) * 1926-06-09 1928-10-01 Philips Nv Glühkathode für Entladungsgefässe.
NL23762C (de) * 1928-04-13
DE597580C (de) * 1928-05-01 1934-05-26 Osram G M B H Komm Ges Elektrische Leucht- oder Ultraviolett-Bestrahlungsroehre
GB311294A (en) * 1928-05-08 1930-08-08 Hans Joachim Spanner Improvements in and relating to electric discharge devices
US2249672A (en) * 1936-12-10 1941-07-15 Gen Electric Discharge device
BE482916A (de) * 1947-06-05
GB650730A (en) * 1947-07-16 1951-02-28 British Thomson Houston Co Ltd Improvements in and relating to electron emitting materials

Also Published As

Publication number Publication date
FR1073725A (fr) 1954-09-28
NL168358C (nl)
CH314779A (de) 1956-06-30
IT500462A (de)
DE974888C (de) 1961-05-25
BE518639A (de)

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