GB676009A - Improvements in or relating to indirectly-heated cathodes for electric discharge tubes - Google Patents

Improvements in or relating to indirectly-heated cathodes for electric discharge tubes

Info

Publication number
GB676009A
GB676009A GB6742/49A GB674249A GB676009A GB 676009 A GB676009 A GB 676009A GB 6742/49 A GB6742/49 A GB 6742/49A GB 674249 A GB674249 A GB 674249A GB 676009 A GB676009 A GB 676009A
Authority
GB
United Kingdom
Prior art keywords
indirectly
relating
electric discharge
discharge tubes
heated cathodes
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
GB6742/49A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Philips Electronics 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, Philips Electronics NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB676009A publication Critical patent/GB676009A/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
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/22—Heaters

Landscapes

  • Gas-Filled Discharge Tubes (AREA)
  • Solid Thermionic Cathode (AREA)
  • Discharge Lamp (AREA)
GB6742/49A 1948-03-15 1949-03-11 Improvements in or relating to indirectly-heated cathodes for electric discharge tubes Expired GB676009A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL270976X 1948-03-15

Publications (1)

Publication Number Publication Date
GB676009A true GB676009A (en) 1952-07-23

Family

ID=19781927

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6742/49A Expired GB676009A (en) 1948-03-15 1949-03-11 Improvements in or relating to indirectly-heated cathodes for electric discharge tubes

Country Status (7)

Country Link
US (1) US2593856A (enrdf_load_stackoverflow)
BE (1) BE487889A (enrdf_load_stackoverflow)
CH (1) CH270976A (enrdf_load_stackoverflow)
DE (1) DE809324C (enrdf_load_stackoverflow)
FR (1) FR983147A (enrdf_load_stackoverflow)
GB (1) GB676009A (enrdf_load_stackoverflow)
NL (1) NL68498C (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3869692A (en) * 1973-05-07 1975-03-04 Gte Sylvania Inc Heater for vacuum tube cathode in which the wire of the heater legs has been etched to reduce its diameter

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US247097A (en) * 1881-09-13 Joseph v
USRE19870E (en) * 1927-11-16 1936-02-25 Electron discharge device with
US2075876A (en) * 1927-12-28 1937-04-06 Electrons Inc Cathode organization
US1914883A (en) * 1929-10-22 1933-06-20 Frederick G Cottrell Method and apparatus for producing ions
US1968280A (en) * 1933-05-01 1934-07-31 Grigsby Grunow Co Cathode structure
US2399402A (en) * 1941-04-08 1946-04-30 Bendix Aviat Corp Electrical connecting and radioshielding means
US2403445A (en) * 1941-05-31 1946-07-09 Bell Telephone Labor Inc Electron discharge device
US2403444A (en) * 1941-05-31 1946-07-09 Bell Telephone Labor Inc Electron discharge device

Also Published As

Publication number Publication date
FR983147A (fr) 1951-06-19
BE487889A (enrdf_load_stackoverflow)
DE809324C (de) 1951-07-26
NL68498C (enrdf_load_stackoverflow)
US2593856A (en) 1952-04-22
CH270976A (de) 1950-09-30

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