GB766829A - Multiple density oxide coated cathodes and filament wire - Google Patents

Multiple density oxide coated cathodes and filament wire

Info

Publication number
GB766829A
GB766829A GB19246/54A GB1924654A GB766829A GB 766829 A GB766829 A GB 766829A GB 19246/54 A GB19246/54 A GB 19246/54A GB 1924654 A GB1924654 A GB 1924654A GB 766829 A GB766829 A GB 766829A
Authority
GB
United Kingdom
Prior art keywords
filament wire
oxide coated
density oxide
multiple density
thick
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
GB19246/54A
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.)
GTE Sylvania Inc
Original Assignee
Sylvania Electric Products Inc
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 Sylvania Electric Products Inc filed Critical Sylvania Electric Products Inc
Publication of GB766829A publication Critical patent/GB766829A/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

Landscapes

  • Solid Thermionic Cathode (AREA)

Abstract

766,829. Cathode materials and processing. SYLVANIA ELECTRIC PRODUCTS, Inc. June 30, 1954 [July 6, 1953], No. 19246/54. Class 39(1). A thermionic cathode has an underlying smooth dense coating 28 of oxide, and an outer layer 42, fluffy and less dense, of the same material. In an example, a filament wire of 0À00045 in. diameter is coated, electrophoretically or by spraying, with a layer of the usual carbonates, about 0À001 in. thick, and density 1-3 gm./cc. A further sprayed layer is then applied, of density about 0À4 to 0À5 gm./cc., and 0À0015 in. thick. Indirectly heated cathodes may be similarly prepared.
GB19246/54A 1953-07-06 1954-06-30 Multiple density oxide coated cathodes and filament wire Expired GB766829A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US766829XA 1953-07-06 1953-07-06

Publications (1)

Publication Number Publication Date
GB766829A true GB766829A (en) 1957-01-23

Family

ID=22133584

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19246/54A Expired GB766829A (en) 1953-07-06 1954-06-30 Multiple density oxide coated cathodes and filament wire

Country Status (1)

Country Link
GB (1) GB766829A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2945150A (en) * 1958-12-11 1960-07-12 Gen Electric Thermionic cathodes and methods of making

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2945150A (en) * 1958-12-11 1960-07-12 Gen Electric Thermionic cathodes and methods of making

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