GB713942A - Improvements in and relating to grid wires for electron discharge devices - Google Patents

Improvements in and relating to grid wires for electron discharge devices

Info

Publication number
GB713942A
GB713942A GB1013650A GB1013650A GB713942A GB 713942 A GB713942 A GB 713942A GB 1013650 A GB1013650 A GB 1013650A GB 1013650 A GB1013650 A GB 1013650A GB 713942 A GB713942 A GB 713942A
Authority
GB
United Kingdom
Prior art keywords
wire
base metal
electron discharge
molybdenum
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
GB1013650A
Inventor
Derek Oscar Walter
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.)
Johnson Matthey PLC
Original Assignee
Johnson Matthey 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 Johnson Matthey PLC filed Critical Johnson Matthey PLC
Priority to GB1013650A priority Critical patent/GB713942A/en
Publication of GB713942A publication Critical patent/GB713942A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
    • H01J19/28—Non-electron-emitting electrodes; Screens
    • H01J19/30—Non-electron-emitting electrodes; Screens characterised by the material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
    • H01J2893/0012—Constructional arrangements
    • H01J2893/0019—Chemical composition and manufacture
    • H01J2893/002—Chemical composition and manufacture chemical

Abstract

A grid wire for an electron discharge device comprises a wire of base metal or base metal alloy and a surface layer of noble metal or metals, the surface layer having been applied to the wire as a solution of at least one noble metal sulphoresinate or resinate in an organic solvent such as an essential oil and heated to burn away the organic matter. The solvent may also contain more volatile constituents such as chloroform or carbon tetrachloride. Two or more applications of solution may be made to increase the thickness of the layer, the wire being fired after each application or only after the first application. Firing temperatures may be between 300 and 600 DEG C., or between 600 and 1000 DEG C. when using a hydrogen atmosphere. Base metal wires of molybdenum, tungsten, nickel, steel or molybdenum-tungsten alloy, and solutions of silver, gold, platinum and palladium are referred to. The Provisional Specification refers to the coating of metals generally by such treatment.
GB1013650A 1950-04-25 1950-04-25 Improvements in and relating to grid wires for electron discharge devices Expired GB713942A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1013650A GB713942A (en) 1950-04-25 1950-04-25 Improvements in and relating to grid wires for electron discharge devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1013650A GB713942A (en) 1950-04-25 1950-04-25 Improvements in and relating to grid wires for electron discharge devices

Publications (1)

Publication Number Publication Date
GB713942A true GB713942A (en) 1954-08-18

Family

ID=9962175

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1013650A Expired GB713942A (en) 1950-04-25 1950-04-25 Improvements in and relating to grid wires for electron discharge devices

Country Status (1)

Country Link
GB (1) GB713942A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2208874A (en) * 1987-08-20 1989-04-19 Central Glass Co Ltd Method of forming coating film of titanium containing oxide by using alkoxide solution

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2208874A (en) * 1987-08-20 1989-04-19 Central Glass Co Ltd Method of forming coating film of titanium containing oxide by using alkoxide solution

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