GB297028A - Electron emitters and process of making same - Google Patents

Electron emitters and process of making same

Info

Publication number
GB297028A
GB297028A GB17102/28A GB1710228A GB297028A GB 297028 A GB297028 A GB 297028A GB 17102/28 A GB17102/28 A GB 17102/28A GB 1710228 A GB1710228 A GB 1710228A GB 297028 A GB297028 A GB 297028A
Authority
GB
United Kingdom
Prior art keywords
alloy
barium
platinum
heated
strontium
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
GB17102/28A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB297028A publication Critical patent/GB297028A/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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/261—In terms of molecular thickness or light wave length

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Solid Thermionic Cathode (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
GB17102/28A 1927-09-12 1928-06-13 Electron emitters and process of making same Expired GB297028A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US218998A US1921065A (en) 1927-09-12 1927-09-12 Electron emitter and process of making same

Publications (1)

Publication Number Publication Date
GB297028A true GB297028A (en) 1929-08-08

Family

ID=22817366

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17102/28A Expired GB297028A (en) 1927-09-12 1928-06-13 Electron emitters and process of making same

Country Status (5)

Country Link
US (1) US1921065A (en:Method)
BE (1) BE352966A (en:Method)
FR (1) FR658058A (en:Method)
GB (1) GB297028A (en:Method)
NL (1) NL27285C (en:Method)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5022883A (en) * 1990-11-06 1991-06-11 The United States Of America As Represented By The Secretary Of The Army Method of making a long life high current density cathode from aluminum oxide and tungsten oxide powders

Also Published As

Publication number Publication date
FR658058A (fr) 1929-05-30
NL27285C (en:Method)
US1921065A (en) 1933-08-08
BE352966A (en:Method)

Similar Documents

Publication Publication Date Title
US2393803A (en) Method of making long life secondary electron emitters
US2233917A (en) Black coating for electron discharge devices
GB297028A (en) Electron emitters and process of making same
GB182817A (en) Improvements in the cathodes of electric discharge tubes
US1849594A (en) Oxide cathode
US1863342A (en) Electron discharge device
US1691446A (en) Electron-discharge device with oxide-coated filament
GB613946A (en) Improvements in or relating to thermionic tubes having a secondary-emission electrode
US1957486A (en) Electron emitter
US1871352A (en) Electron discharge device and method of manufacture
US1758710A (en) Electron-discharge device
US1668734A (en) Electron-emitting cathode and method of making it
GB405466A (en:Method)
GB459469A (en) Improvements in or relating to vacuum tight seals for electron discharge devices
US1659207A (en) Method of cleaning up residual gases
GB274509A (en) Incandescent cathode for electron discharge tubes
GB285434A (en) Improved process of manufacturing incandescent cathodes for electric discharge devices
GB304396A (en) Improved process for coating metallic or non-metallic bodies with rhodium, iridium, and ruthenium
US1648958A (en) Evacuated device and method of exhaust
GB255090A (en) Improvements in or relating to methods of manufacturing electrodes for electron discharge devices
GB350938A (en) Improvements in vacuum electric tube devices
GB299715A (en) Improvements in vacuum electric tube devices
GB365303A (en) Electron tube with incandescent cathode
GB326334A (en) Improvements relating to electron discharge tubes or thermionic valves
GB404169A (en) Thermionic cathode for electric discharge devices