GB492025A - Improved method of manufacturing secondary-emission electrodes - Google Patents

Improved method of manufacturing secondary-emission electrodes

Info

Publication number
GB492025A
GB492025A GB9752/38A GB975238A GB492025A GB 492025 A GB492025 A GB 492025A GB 9752/38 A GB9752/38 A GB 9752/38A GB 975238 A GB975238 A GB 975238A GB 492025 A GB492025 A GB 492025A
Authority
GB
United Kingdom
Prior art keywords
improved method
emission electrodes
manufacturing secondary
electrodes
gloeilampenfabrieken
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
GB9752/38A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB492025A publication Critical patent/GB492025A/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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Cold Cathode And The Manufacture (AREA)
  • Discharge Lamp (AREA)

Abstract

492,025. Electrode materials. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. March 30, 1938, No. 9752. Convention date, April 2, 1937. [Class 39 (i)] In the manufacture of secondary electron emitting electrodes, the support is provided with a layer of carbon on to which is vaporized a coating of an alkali metal, preferably caesium which is then oxidized.
GB9752/38A 1937-04-02 1938-03-30 Improved method of manufacturing secondary-emission electrodes Expired GB492025A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL207265X 1937-04-02

Publications (1)

Publication Number Publication Date
GB492025A true GB492025A (en) 1938-09-13

Family

ID=19778619

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9752/38A Expired GB492025A (en) 1937-04-02 1938-03-30 Improved method of manufacturing secondary-emission electrodes

Country Status (6)

Country Link
US (1) US2190695A (en)
BE (1) BE427303A (en)
CH (1) CH207265A (en)
FR (1) FR836016A (en)
GB (1) GB492025A (en)
NL (1) NL50264C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2530167A (en) * 1944-12-14 1950-11-14 Hartford Nat Bank & Trust Co Discharge tube

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2637002A (en) * 1953-04-28 Television pickup tube
BE446289A (en) * 1941-07-03
GB1200899A (en) * 1967-04-21 1970-08-05 Mullard Ltd Improvements in or relating to photocathodes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2530167A (en) * 1944-12-14 1950-11-14 Hartford Nat Bank & Trust Co Discharge tube

Also Published As

Publication number Publication date
CH207265A (en) 1939-10-15
BE427303A (en)
FR836016A (en) 1939-01-09
NL50264C (en)
US2190695A (en) 1940-02-20

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