FR678731A - Improvements in the production of electron emitting materials - Google Patents

Improvements in the production of electron emitting materials

Info

Publication number
FR678731A
FR678731A FR678731DA FR678731A FR 678731 A FR678731 A FR 678731A FR 678731D A FR678731D A FR 678731DA FR 678731 A FR678731 A FR 678731A
Authority
FR
France
Prior art keywords
production
electron emitting
emitting materials
materials
electron
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
Other languages
French (fr)
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.)
Westinghouse Lamp Co
Original Assignee
Westinghouse Lamp Co
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 Westinghouse Lamp Co filed Critical Westinghouse Lamp Co
Application granted granted Critical
Publication of FR678731A publication Critical patent/FR678731A/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
    • B65H35/0006—Article or web delivery apparatus incorporating cutting or line-perforating devices
    • B65H35/006—Article or web delivery apparatus incorporating cutting or line-perforating devices with means for delivering a predetermined length of tape

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Solid Thermionic Cathode (AREA)
  • Paints Or Removers (AREA)
  • Discharge Lamp (AREA)
FR678731D 1928-07-20 1929-07-18 Improvements in the production of electron emitting materials Expired FR678731A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US294326A US1842161A (en) 1928-07-20 1928-07-20 Electron emission material

Publications (1)

Publication Number Publication Date
FR678731A true FR678731A (en) 1930-04-03

Family

ID=23132929

Family Applications (1)

Application Number Title Priority Date Filing Date
FR678731D Expired FR678731A (en) 1928-07-20 1929-07-18 Improvements in the production of electron emitting materials

Country Status (6)

Country Link
US (1) US1842161A (en)
BE (1) BE362221A (en)
DE (1) DE521050C (en)
FR (1) FR678731A (en)
GB (1) GB316104A (en)
NL (1) NL28930C (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE745742C (en) * 1937-03-09 1944-03-31 Elek Zitaets Ag Process for the manufacture of oxide cathodes
US2600112A (en) * 1948-06-30 1952-06-10 Sylvania Electric Prod Electron emitter
US2673387A (en) * 1951-05-18 1954-03-30 Gen Electric Electron emission coating mixtures
US2985548A (en) * 1957-12-26 1961-05-23 Sylvania Electric Prod Method of making a low density coating for an electron discharge device
US4411827A (en) * 1981-03-18 1983-10-25 Corneille David M Coprecipitation process for thermionic cathode type materials
US4359489A (en) * 1981-03-18 1982-11-16 Corneille David M Coprecipitation process for thermionic cathode type materials

Also Published As

Publication number Publication date
GB316104A (en) 1930-09-25
BE362221A (en)
US1842161A (en) 1932-01-19
NL28930C (en)
DE521050C (en) 1931-03-16

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