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GB758182A - Improvements in cathodes for electric discharge tubes, such as pulse tubes, and method of making them - Google Patents

Improvements in cathodes for electric discharge tubes, such as pulse tubes, and method of making them

Info

Publication number
GB758182A
GB758182A GB29752/51A GB2975251A GB758182A GB 758182 A GB758182 A GB 758182A GB 29752/51 A GB29752/51 A GB 29752/51A GB 2975251 A GB2975251 A GB 2975251A GB 758182 A GB758182 A GB 758182A
Authority
GB
United Kingdom
Prior art keywords
tubes
cathodes
dec
making
electric discharge
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
GB29752/51A
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.)
Egyesuelt Izzolampa es Villamossagi Rt
Original Assignee
Egyesuelt Izzolampa es Villamossagi Rt
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 Egyesuelt Izzolampa es Villamossagi Rt filed Critical Egyesuelt Izzolampa es Villamossagi Rt
Publication of GB758182A publication Critical patent/GB758182A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/28—Dispenser-type cathodes, e.g. L-cathode

Landscapes

  • Discharge Lamp (AREA)

Abstract

758,182. Cathode materials and processing. EGYESULT IZZOLAMPA ES VILLAMOSSAGI, R. T. Dec. 19, 1951 [Dec. 19, 1950], No. 29752/51. Class 39 (1). A " supply " cathode having an oxide underlayer to the emissive layer of alkaline earth metal is made by impregnating a porous core body of compressed sintered tungsten with a decomposable compound such as the nitrate, converting to oxide by heating not above 600‹ C. in vacuum, and activating at about 1000‹ C. The work function is less than 1.5 volts. The tungsten body may contain thorium, the starting compound being then a mixture of ammonium tungstate and thorium monoxide which is reduced in hydrogen before sintering. An additional reserve of emissive material may be placed on the non-emitting side of the core body.
GB29752/51A 1950-12-19 1951-12-19 Improvements in cathodes for electric discharge tubes, such as pulse tubes, and method of making them Expired GB758182A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HU307120X 1950-12-19

Publications (1)

Publication Number Publication Date
GB758182A true GB758182A (en) 1956-10-03

Family

ID=10978740

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29752/51A Expired GB758182A (en) 1950-12-19 1951-12-19 Improvements in cathodes for electric discharge tubes, such as pulse tubes, and method of making them

Country Status (2)

Country Link
CH (1) CH307120A (en)
GB (1) GB758182A (en)

Also Published As

Publication number Publication date
CH307120A (en) 1955-05-15

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