GB931059A - Improvements in and relating to thermionic cathodes - Google Patents

Improvements in and relating to thermionic cathodes

Info

Publication number
GB931059A
GB931059A GB5006/61A GB500661A GB931059A GB 931059 A GB931059 A GB 931059A GB 5006/61 A GB5006/61 A GB 5006/61A GB 500661 A GB500661 A GB 500661A GB 931059 A GB931059 A GB 931059A
Authority
GB
United Kingdom
Prior art keywords
tube
wires
wound
cathode
feb
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
GB5006/61A
Inventor
Basil Antonis
Leonard Charles Wiltshire
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.)
EMI Group Ltd
Original Assignee
Thorn Electrical Industries Ltd
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 Thorn Electrical Industries Ltd filed Critical Thorn Electrical Industries Ltd
Priority to GB5006/61A priority Critical patent/GB931059A/en
Priority to US171658A priority patent/US3250943A/en
Priority to DET14342U priority patent/DE1904105U/en
Publication of GB931059A publication Critical patent/GB931059A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/067—Main electrodes for low-pressure discharge lamps
    • H01J61/0672—Main electrodes for low-pressure discharge lamps characterised by the construction of the electrode

Landscapes

  • Discharge Lamp (AREA)

Abstract

931,059. Thermionic cathodes. THORN ELECTRICAL INDUSTRIES Ltd. Feb. 8, 1962 [Feb. 10, 1961], No. 5006/61. Class 39 (1). A cathode comprises a number of fine tungsten wires braided to form a tube 10 which is filled with thermionically emissive material except for end portions 16, 17 which are secured to lead-in wires 11, 12. The cathode may be used in a lowpressure fluorescent discharge lamp, the tube 10 being wound into a helix transverse to the tube axis, or into a double helix coaxial with the tube axis. The tube 10 may be formed by braiding eight tungsten wires on a mandrel of molybdenum wire, half the wires being wound in one direction and half in the opposite direction, each wire crossing alternately inside and outside those wound in the opposite direction. Dimensions are given. The tube is then set in a desired shape, and, after removal of the core, is filled with a mixture of alkaline earth carbonates. The resistance of the cathode should be between 2.5 and 2.7 ohms at 20‹ C.
GB5006/61A 1961-02-10 1961-02-10 Improvements in and relating to thermionic cathodes Expired GB931059A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB5006/61A GB931059A (en) 1961-02-10 1961-02-10 Improvements in and relating to thermionic cathodes
US171658A US3250943A (en) 1961-02-10 1962-02-07 Braided thermionic cathode having emissive material
DET14342U DE1904105U (en) 1961-02-10 1962-02-10 CATHODE WITH GLOW EMISSION.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5006/61A GB931059A (en) 1961-02-10 1961-02-10 Improvements in and relating to thermionic cathodes

Publications (1)

Publication Number Publication Date
GB931059A true GB931059A (en) 1963-07-10

Family

ID=9787970

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5006/61A Expired GB931059A (en) 1961-02-10 1961-02-10 Improvements in and relating to thermionic cathodes

Country Status (3)

Country Link
US (1) US3250943A (en)
DE (1) DE1904105U (en)
GB (1) GB931059A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3356883A (en) * 1964-12-27 1967-12-05 Sylvania Electric Prod Florescent lamp having electrodes comprising a tubular braid and an additional wire coiled about the same space
GB1107617A (en) * 1966-09-13 1968-03-27 British Lighting Ind Ltd An electrode for a high-pressure discharge lamp
US3546519A (en) * 1968-08-21 1970-12-08 Tokyo Shibaura Electric Co Fluorescent lamps with coil electrodes and electrode support structure
US3710161A (en) * 1970-10-30 1973-01-09 Gen Electric Quick-heating impregnated planar cathode
US3656020A (en) * 1970-11-18 1972-04-11 Spectra Mat Inc Thermionic cathode comprising mixture of barium oxide, calcium oxide and lithium oxide
US4611147A (en) * 1984-04-05 1986-09-09 The United States Of America As Represented By The United States Department Of Energy Thermionic gas switch
DE20016783U1 (en) * 2000-09-28 2000-12-14 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 81543 München Filament electrode for a fluorescent lamp

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US317171A (en) * 1885-05-05 Alexander
US1416623A (en) * 1914-10-01 1922-05-16 Donath Bruno Electric discharging tube
US2161790A (en) * 1933-08-26 1939-06-13 Lumineles Electrode for vacuum tubes
US2107945A (en) * 1934-11-20 1938-02-08 Gen Electric Cathode structure
US2171238A (en) * 1937-09-02 1939-08-29 Westinghouse Electric & Mfg Co Discharge device and electrode
US2201731A (en) * 1938-11-30 1940-05-21 Gen Electric Discharge tube electrode assembly
US2438181A (en) * 1943-05-27 1948-03-23 Westinghouse Electric Corp Fluorescent and/or cathode glow lamp and method
BE477491A (en) * 1943-05-28

Also Published As

Publication number Publication date
US3250943A (en) 1966-05-10
DE1904105U (en) 1964-11-12

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