GB514849A - Improvements in or relating to oxide coated cathodes and to their manufacture - Google Patents

Improvements in or relating to oxide coated cathodes and to their manufacture

Info

Publication number
GB514849A
GB514849A GB1469038A GB1469038A GB514849A GB 514849 A GB514849 A GB 514849A GB 1469038 A GB1469038 A GB 1469038A GB 1469038 A GB1469038 A GB 1469038A GB 514849 A GB514849 A GB 514849A
Authority
GB
United Kingdom
Prior art keywords
manufacture
oxide coated
cataphoresis
class
relating
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
GB1469038A
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.)
General Electric Co PLC
Original Assignee
General Electric Co 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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB1469038A priority Critical patent/GB514849A/en
Publication of GB514849A publication Critical patent/GB514849A/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

Abstract

514,849. Coating metals by cataphoresis. GENERAL ELECTRIC CO., Ltd., and BENJAMIN, M. May 17,1938, No. 14690. [Class 41] Carbonate coated metal cores for use in the manufacture of oxide coated cathodes for electric discharge lamps are prepared by depositing by cataphoresis, particles of alkaline metal carbonates having diameters between ¢Á and 150Á from a suspension in an organic liquid containing acetone and an organic binder. A suitable mixture consists of acetone, ethylene glycol and nitro-cellulose. Preferably mixed barium and strontium carbonates are deposited on nickel or tungsten, either as anode or cathode, direction of movement of the particles depending on the nature of the liquid. The coating may be removed from part of the core by partly removing it from the bath, and reversing the current. Specifications 325,317, [Class 41], and 444,723 are referred to.
GB1469038A 1938-05-17 1938-05-17 Improvements in or relating to oxide coated cathodes and to their manufacture Expired GB514849A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1469038A GB514849A (en) 1938-05-17 1938-05-17 Improvements in or relating to oxide coated cathodes and to their manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1469038A GB514849A (en) 1938-05-17 1938-05-17 Improvements in or relating to oxide coated cathodes and to their manufacture

Publications (1)

Publication Number Publication Date
GB514849A true GB514849A (en) 1939-11-20

Family

ID=10045819

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1469038A Expired GB514849A (en) 1938-05-17 1938-05-17 Improvements in or relating to oxide coated cathodes and to their manufacture

Country Status (1)

Country Link
GB (1) GB514849A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2442864A (en) * 1944-11-23 1948-06-08 Sylvania Electric Prod Electrophoresis coating of electron tube parts
US2442863A (en) * 1944-11-23 1948-06-08 Sylvania Electric Prod Electrophoresis coating of electron tube parts
US2462125A (en) * 1943-07-23 1949-02-22 Int Standard Electric Corp Electrophoretic coating of metal articles
US3392101A (en) * 1963-07-26 1968-07-09 Goodlass Wall & Co Ltd Process of electrophoretic deposition using symmetrical alternating current

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2462125A (en) * 1943-07-23 1949-02-22 Int Standard Electric Corp Electrophoretic coating of metal articles
US2442864A (en) * 1944-11-23 1948-06-08 Sylvania Electric Prod Electrophoresis coating of electron tube parts
US2442863A (en) * 1944-11-23 1948-06-08 Sylvania Electric Prod Electrophoresis coating of electron tube parts
US3392101A (en) * 1963-07-26 1968-07-09 Goodlass Wall & Co Ltd Process of electrophoretic deposition using symmetrical alternating current

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