GB717362A - Improvements in and relating to electron emission coating mixtures - Google Patents

Improvements in and relating to electron emission coating mixtures

Info

Publication number
GB717362A
GB717362A GB12605/52A GB1260552A GB717362A GB 717362 A GB717362 A GB 717362A GB 12605/52 A GB12605/52 A GB 12605/52A GB 1260552 A GB1260552 A GB 1260552A GB 717362 A GB717362 A GB 717362A
Authority
GB
United Kingdom
Prior art keywords
carbonates
acetate
binder
relating
mixture
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
GB12605/52A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB717362A publication Critical patent/GB717362A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Dental Preparations (AREA)
  • Solid Thermionic Cathode (AREA)

Abstract

717,362. Cathode materials and processing. BRITISH THOMSON-HOUSTON CO., Ltd. May 19, 1952 [May 18, 1951], No. 12605/52. Class 39(1) The cathode is coated with a mixture of alkaline earth carbonates suspended in cellulose dissolved in ethylene glycol monoethyl ether acetate. The mixture may comprise a suspension of 130- 260 grams of alkaline earth carbonates, preferably the triple carbonates, in 115-145 ml. of nitrocellulose dissolved in " Cellosolve Acetate" (Registered Trade Mark) The triple carbonate may consist of barium 38.6 mol per cent, strontium 31 and calcium 30.4, and the binder of 2.1 kg. of nitrocellulose in 147 kg. of acetate to give a specified solid content and viscosity; 17.04 litres of the binder may be mixed with 30 kg of the carbonates and ball-mixed for 20 hours.
GB12605/52A 1951-05-18 1952-05-19 Improvements in and relating to electron emission coating mixtures Expired GB717362A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US227115A US2673387A (en) 1951-05-18 1951-05-18 Electron emission coating mixtures

Publications (1)

Publication Number Publication Date
GB717362A true GB717362A (en) 1954-10-27

Family

ID=22851796

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12605/52A Expired GB717362A (en) 1951-05-18 1952-05-19 Improvements in and relating to electron emission coating mixtures

Country Status (3)

Country Link
US (1) US2673387A (en)
FR (1) FR1066112A (en)
GB (1) GB717362A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2995461A (en) * 1956-04-02 1961-08-08 Libbey Owens Ford Glass Co Protective coatings
US2963450A (en) * 1958-03-17 1960-12-06 Interlectric Corp Filament coating composition
NL278466A (en) * 1961-05-16
NL278653A (en) * 1961-06-01
US4251569A (en) * 1975-10-22 1981-02-17 Gte Products Corporation Method of coating arc discharge lamp electrode
US6713950B2 (en) * 2001-08-22 2004-03-30 General Electric Company Low volatility slurry for emission mix powder

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1791301A (en) * 1926-05-19 1931-02-03 Carbide & Carbon Chem Corp Solution of cellulose derivatives
BE362221A (en) * 1928-07-20
US2083372A (en) * 1934-08-29 1937-06-08 Walter S Guthmann Sympathetic ink
US2223977A (en) * 1939-07-29 1940-12-03 Rca Corp Introducing active metals into envelopes

Also Published As

Publication number Publication date
US2673387A (en) 1954-03-30
FR1066112A (en) 1954-06-02

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