[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

GB1045396A - Thermionic cathodes - Google Patents

Thermionic cathodes

Info

Publication number
GB1045396A
GB1045396A GB3151665A GB3151665A GB1045396A GB 1045396 A GB1045396 A GB 1045396A GB 3151665 A GB3151665 A GB 3151665A GB 3151665 A GB3151665 A GB 3151665A GB 1045396 A GB1045396 A GB 1045396A
Authority
GB
United Kingdom
Prior art keywords
metal
spraying
lanthanum boride
refractory
thermionic cathode
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
GB3151665A
Inventor
John Edward Milne
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.)
STC PLC
Original Assignee
Standard Telephone and Cables 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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB3151665A priority Critical patent/GB1045396A/en
Priority to NL6609814A priority patent/NL6609814A/xx
Priority to DE19661564167 priority patent/DE1564167A1/en
Priority to FR70535A priority patent/FR91957E/en
Publication of GB1045396A publication Critical patent/GB1045396A/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
    • H01J1/14—Solid thermionic cathodes characterised by the material

Landscapes

  • Solid Thermionic Cathode (AREA)

Abstract

1,045,396. Thermionic cathode materials and processing. STANDARD TELEPHONES & CABLES Ltd. July 23, 1965, No. 31516/65. Heading H1D. A thermionic cathode comprises a refractory metal base, a barrier layer of a refractory carbide of a metal having a higher affinity for carbon than does the base metal, and an emissive layer of lanthanum boride. In particular, a directly-heated cathode may comprise a W or Mo filament coated by spraying with a mixture of zirconium carbide. After sintering, an outer layer of lanthanum boride is applied by painting, spraying or electrophoresis. A specific example is given.
GB3151665A 1965-07-23 1965-07-23 Thermionic cathodes Expired GB1045396A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB3151665A GB1045396A (en) 1965-07-23 1965-07-23 Thermionic cathodes
NL6609814A NL6609814A (en) 1965-07-23 1966-07-13
DE19661564167 DE1564167A1 (en) 1965-07-23 1966-07-21 Glow cathode
FR70535A FR91957E (en) 1965-07-23 1966-07-22 Electronic tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3151665A GB1045396A (en) 1965-07-23 1965-07-23 Thermionic cathodes

Publications (1)

Publication Number Publication Date
GB1045396A true GB1045396A (en) 1966-10-12

Family

ID=10324250

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3151665A Expired GB1045396A (en) 1965-07-23 1965-07-23 Thermionic cathodes

Country Status (3)

Country Link
DE (1) DE1564167A1 (en)
GB (1) GB1045396A (en)
NL (1) NL6609814A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2402297A1 (en) * 1977-09-02 1979-03-30 Balzers Hochvakuum ELECTRONIC EMISSION CATHODE
EP0013201B1 (en) * 1978-12-27 1982-05-19 Thomson-Csf Directly heated cathode and high frequency electron tube comprising such a cathode

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2627897B1 (en) * 1988-02-26 1990-06-22 Thomson Csf DIRECT HEATING CATHODE IN THERMOEMISSIF MATERIAL
DE4305558A1 (en) * 1993-02-24 1994-08-25 Asea Brown Boveri Process for the manufacture of wires which are especially suitable for cathodes of electron tubes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2402297A1 (en) * 1977-09-02 1979-03-30 Balzers Hochvakuum ELECTRONIC EMISSION CATHODE
EP0013201B1 (en) * 1978-12-27 1982-05-19 Thomson-Csf Directly heated cathode and high frequency electron tube comprising such a cathode

Also Published As

Publication number Publication date
NL6609814A (en) 1967-01-24
DE1564167A1 (en) 1970-02-12

Similar Documents

Publication Publication Date Title
GB949151A (en) Cold emission point type cathodes
GB793726A (en) Improvements in or relating to dispenser cathodes
GB568962A (en) Improvements in or relating to cathodes for electron discharge devices
GB1469554A (en) Thermionic cathodes
GB1045396A (en) Thermionic cathodes
GB725719A (en) Improvements in and relating to cathodes for electric discharge devices
GB666053A (en) Improvements in or relating to thermionic cathodes
GB1083833A (en) Cathode
SE304558B (en)
GB1015840A (en) Thermionic valves
GB739232A (en) Improvements in or relating to dispenser cathodes
GB1038775A (en) Improvements in or relating to cathode elements
GB1426509A (en) Field-emission electron guns
GB924595A (en) Method of manufacturing cathodes
GB943535A (en) Improvements in or relating to discharge lamps
GB795566A (en) Improvements in or relating to thermionic dispenser cathodes
GB1016067A (en) Electrode structures for electron tubes
GB1170880A (en) Improvements in or relating to thorium-film thermionic cathodes for electrical discharge vessels.
GB1070377A (en) Improvements in or relating to thermionic cathodes and to electron discharge devices employing thermionic cathodes
GB731421A (en) Improvements in or relating to thermionic cathodes
GB1189940A (en) Magnetron Cathodes
Marrian et al. Fast turn-on osmium coated cathode
GB1226627A (en)
GB1167157A (en) Electric Discharge Tube.
GB758182A (en) Improvements in cathodes for electric discharge tubes, such as pulse tubes, and method of making them