GB854752A - Improvements in or relating to high-pressure electric discharge tubes - Google Patents

Improvements in or relating to high-pressure electric discharge tubes

Info

Publication number
GB854752A
GB854752A GB25356/58A GB2535658A GB854752A GB 854752 A GB854752 A GB 854752A GB 25356/58 A GB25356/58 A GB 25356/58A GB 2535658 A GB2535658 A GB 2535658A GB 854752 A GB854752 A GB 854752A
Authority
GB
United Kingdom
Prior art keywords
bore
tube
emissive material
aug
electrode
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
GB25356/58A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB854752A publication Critical patent/GB854752A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/43—Solvents
    • 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
    • H01J61/073—Main electrodes for high-pressure discharge lamps
    • H01J61/0732—Main electrodes for high-pressure discharge lamps characterised by the construction of the electrode

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Discharge Lamp (AREA)

Abstract

854,752. Discharge lamps. PHILIPS ELECTRICAL INDUSTRIES Ltd. Aug. 7, 1958 [Aug. 10, 1957], No. 25356/58. Class 39(1). In a high pressure discharge tube of the kind described in Specification 854,751 having an electrode provided with a conical cavity, the apex of which merges into a cylindrical bore, this bore opens into a space having a greater crosssectional area than the bore and containing a material having a higher electron emission than the electrode body and a member in contact with both the emissive material and the wall of the cylindrical bore to promote the migration of the emissive material to the bore. As shown this member is a tungsten wire helix 37. Two layers of helically coiled tungsten wire 34 connect the current supply lead 33 to the tungsten electrode 30. The emissive material 38 may be a mixture of barium oxide and thorium oxide. A tube comprising a quartz envelope and two similar electrodes is described and suitable dimensions are given. The tube may be filled with xenon at a pressure of about ten atmospheres.
GB25356/58A 1957-08-10 1958-08-07 Improvements in or relating to high-pressure electric discharge tubes Expired GB854752A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL219805A NL99793C (en) 1957-08-10 1957-08-10

Publications (1)

Publication Number Publication Date
GB854752A true GB854752A (en) 1960-11-23

Family

ID=42270268

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25356/58A Expired GB854752A (en) 1957-08-10 1958-08-07 Improvements in or relating to high-pressure electric discharge tubes

Country Status (5)

Country Link
US (1) US2951171A (en)
DE (1) DE1084374B (en)
FR (1) FR1201219A (en)
GB (1) GB854752A (en)
NL (1) NL99793C (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3258632A (en) * 1966-06-28 Shielded cathode
NL296948A (en) * 1963-08-21
NL296949A (en) * 1963-08-21
US3419947A (en) * 1965-12-10 1969-01-07 Gen Electric Compact source discharge lamp manufacture
US3989973A (en) * 1971-01-02 1976-11-02 Siemens Aktiengesellschaft Cold-cathode gas-discharge device
DE10301478A1 (en) * 2003-01-16 2004-07-29 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Electrode for a high pressure discharge lamp
WO2005015603A2 (en) * 2003-08-11 2005-02-17 Koninklijke Philips Electronics N.V. High-pressure discharge lamp
US8460045B2 (en) 2007-06-25 2013-06-11 General Electric Company High intensity discharge lamp with enhanced dimming characteristcs

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2304412A (en) * 1939-10-04 1942-12-08 Gen Electric Electric high pressure discharge lamp
DE880360C (en) * 1943-07-14 1953-06-22 Patra Patent Treuhand Electric spherical high pressure discharge lamp
DE887979C (en) * 1944-06-25 1953-08-27 Quarzlampen Gmbh Electrode heated by the discharge for electric discharge lamps, especially high-pressure mercury lamps
US2821647A (en) * 1951-08-09 1958-01-28 Gen Electric High pressure metal vapor lamp
DE1740085U (en) * 1953-03-06 1957-02-21 Felix Dr Ing Mueller ELECTRODE FOR DISCHARGE VESSELS.
NL95307C (en) * 1956-02-24

Also Published As

Publication number Publication date
NL99793C (en) 1961-11-15
FR1201219A (en) 1959-12-29
DE1084374B (en) 1960-06-30
US2951171A (en) 1960-08-30

Similar Documents

Publication Publication Date Title
US2175345A (en) Electric gaseous discharge device
US2449113A (en) Electric discharge device
US2733368A (en) Kolkman
GB854752A (en) Improvements in or relating to high-pressure electric discharge tubes
US2314134A (en) Gaseous discharge device
ES440664A1 (en) Fluorescent lamp with reduced wattage consumption having electrode shield with getter material
US2301670A (en) Low tension lamp tube
GB854751A (en) Improvements in or relating to high-pressure electric discharge tubes
GB499897A (en) Improvements in auxiliary electrodes in electric discharge devices
GB504120A (en) Improvements in electrodes for high-pressure mercury-vapour discharge devices
US2459633A (en) Fluorescent lamp
GB636383A (en) Improvements in and relating to cathodes for electric discharge devices
US2495580A (en) Indirectly heated cathode
US2367579A (en) Gaseous conduction discharge device
GB931059A (en) Improvements in and relating to thermionic cathodes
GB644409A (en) Improvements in electric discharge lamps
US2121591A (en) Grid glow tube with zero temperature effect
US3105917A (en) Electric discharge device comprising an activated cold cathode
GB1107617A (en) An electrode for a high-pressure discharge lamp
EP0254147A3 (en) Hot cathode type discharge lamp apparatus
US4144472A (en) Glow discharge lamp
GB446860A (en) Improvements in and relating to gaseous electric discharge devices
US2874319A (en) Variable voltage regulator
GB982406A (en) Improvements in or relating to ionization manometers
GB923540A (en) Improvements in or relating to low-pressure arc discharge tubes