US2526559A - Electric discharge lamp and circuit therefor - Google Patents

Electric discharge lamp and circuit therefor Download PDF

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Publication number
US2526559A
US2526559A US3316A US331648A US2526559A US 2526559 A US2526559 A US 2526559A US 3316 A US3316 A US 3316A US 331648 A US331648 A US 331648A US 2526559 A US2526559 A US 2526559A
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US
United States
Prior art keywords
core
lamp
wire
cathode
discharge lamp
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 - Lifetime
Application number
US3316A
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English (en)
Inventor
Frederick G A Haegele
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.)
EKCO ENSIGN ELECTRIC Ltd
EKCO-ENSIGN ELECTRIC Ltd
Original Assignee
EKCO ENSIGN ELECTRIC 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 EKCO ENSIGN ELECTRIC Ltd filed Critical EKCO ENSIGN ELECTRIC Ltd
Application granted granted Critical
Publication of US2526559A publication Critical patent/US2526559A/en
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Expired - Lifetime legal-status Critical Current

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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
    • H01J61/547—Igniting arrangements, e.g. promoting ionisation for starting using an auxiliary electrode outside the vessel
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
    • H05B41/20—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch
    • H05B41/22—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps having an auxiliary starting electrode

Definitions

  • a invention relates charge-lamps-cf the type comprising a pair'oi main operating electrodes thermionically acti- .vated 'andmeans for initiatinga discharge between them; as or-example in -a low pressure discharge, lamp of 1 the. type containing-a fluores- ..centsuhstance excited-by the radiation from the jdischarge.
  • lamps arez'adapte'd for use in circuit with the mains voltages in common use 'in thiscountry, viz.
  • A'fea'ture' of the present invention is a discharge lamp. havinga cathode at each: end of. the
  • j thermionically activematerial on which core are mounted two spaced apart wires, one;end of each wire beingtaken to a terminal at. that end of the lamp, thearrangement.beingi'suchethat the lampjis adapted tobecpnnected so that one-lamp terminal at [each end -thereof..may be connected to., a' source- 017 electric. supply iniseriesnwith a [suitable impedance ,(e, g. choke) whilst5the other two lamp. terminals araccnnected thl'Ollg'hia cur"- rent limiting-device, the construction of the'cathodes being. such that on connection sto the supply source.
  • I the refractory powder may be of tungsten and'the thermionically'active I material be'barium oxide.
  • Ihecomposite, core may be made by compressing a mixture of the tungsten andbarium oxide with or'w'ithout a.
  • removable binder e. g. paraflln wax.
  • This core is held'in two interwound helices b and c each composed of a wire over-' wound with another wire d so that'thissecond wired forms projections on the surface'iof the helices which make contact at isolated points with the core. All the"wiresarepreferably of tung sten.
  • the interwound helices are not in 'electri cal connection, except through the core, andare mounted'rigidly on the lamp-toot so that the core is retained within them'but is not clampedtightly.
  • one helix, say I has one end connectedto one wterminal of the lamp and 'theoth'er 'he'lixlc has one end connected to another termin'a'l'di' the lamp at the same 'end there'of'; Wh lst the other :wends of the helices have no electrical connection betweentthem'except'through the core.
  • auxiliary electrode 'g in the'i'ormof a conand-rieither connected to one electrode heliir di- :rectly, or arranged in close spatial relationship therewith, may be used for thed ssipation of random wall icharges'whichimpede startingl zwhen current is suppliedto this circuit a 1 1ml.
  • the symmetrical structure of the cathode is an advantage in that the lamp may be inserted in an ordinary type of fitting without the possibility of its being connected incorrectly, e, g. the wrong way round, since the spaced apart wires of the cathodes are obviously interchangeable in function.
  • each cathode comprising a core of electrically conductive refractory material incorporating a thermionically active material, two spaced apart wires mounted on each core, one end of each wire connected to a terminal at the corresponding end of the lamp and the other end of each said wire being free and each wire making electrical connection at isolated points with the respective core.
  • each cathode comprising a core of electrically conductive refractory material incorporating a thermionically active material, two helical wires interwound on each core, one end of each wire connected to a terminal at the corresponding end of the lamp and the other end of each said wire being free and each of said wires being separately overwound with a conducting wire making isolated points of contact with the respective core.
  • each cathode comprising a refractory core of high porosity with a rough surface and of high electrical conductivity in a cold state and incorporating thermionically active material, two helical wires interwound on each core, one end of each wire connected to a terminal at the corresponding end of the lamp and the other end of each said wire being free and each of said wires being separately overwound with a conductin wire making isolated points of contact with the respective core.
  • each cathode comprising a core of cylindrical shape with protuberances formed upon it and consisting of electrically conductive refractory material incorporating a thermionically active material, two spaced apart wires wound on each core making contact with said protuberances, one end of each wire being connected to a terminal at the corresponding end of the lamp and the other end of each said wire being free.
  • a cathode at each end of the discharge path comprising a circular cylindrical core of electrically conductive refractory material incorporating a thermionically active material, two separate and intermeshcd wire coils non-clrcular in cross-section mounted on each core and makin isolated points of contact therewith, one end of each wire being connected to a terminal at the corresponding end of the lamp and the other end of each said wire being free.
  • each cathode comprising a core of cylindrical shape non-circular in cross section and consistin of electrically conductive refractory material incorporating a thermlonically active material, two separate and intermeshed wire coils circular in cross-section mounted on each core and making isolated points of contact therewith, one end of each wire being connected to a terminal at the corresponding end of the lamp and the other end of each said wire being free.

Landscapes

  • Discharge Lamp (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
US3316A 1945-11-23 1948-01-20 Electric discharge lamp and circuit therefor Expired - Lifetime US2526559A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB31564/45A GB613847A (en) 1945-11-23 1945-11-23 Improvements in or relating to electric discharge lamps and circuits therefor

Publications (1)

Publication Number Publication Date
US2526559A true US2526559A (en) 1950-10-17

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ID=10325000

Family Applications (1)

Application Number Title Priority Date Filing Date
US3316A Expired - Lifetime US2526559A (en) 1945-11-23 1948-01-20 Electric discharge lamp and circuit therefor

Country Status (5)

Country Link
US (1) US2526559A (es)
BE (1) BE479820A (es)
CH (1) CH273532A (es)
FR (1) FR957886A (es)
GB (1) GB613847A (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2829297A (en) * 1954-04-15 1958-04-01 Machlett Lab Inc Filament structure

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1565565A (en) * 1922-02-02 1925-12-15 Westinghouse Lamp Co Electric gas lamp
US1897642A (en) * 1931-04-16 1933-02-14 Gen Electric Gaseous electric discharge device
US1971890A (en) * 1928-06-14 1934-08-28 Gen Electric Electric discharge tube
US1994306A (en) * 1933-03-10 1935-03-12 Gen Electric Gaseous electric discharge device
US2175345A (en) * 1935-07-12 1939-10-10 Gen Electric Electric gaseous discharge device
US2217438A (en) * 1937-10-18 1940-10-08 Gen Electric Electrode for high-pressure mercury-vapor discharge device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1565565A (en) * 1922-02-02 1925-12-15 Westinghouse Lamp Co Electric gas lamp
US1971890A (en) * 1928-06-14 1934-08-28 Gen Electric Electric discharge tube
US1897642A (en) * 1931-04-16 1933-02-14 Gen Electric Gaseous electric discharge device
US1994306A (en) * 1933-03-10 1935-03-12 Gen Electric Gaseous electric discharge device
US2175345A (en) * 1935-07-12 1939-10-10 Gen Electric Electric gaseous discharge device
US2217438A (en) * 1937-10-18 1940-10-08 Gen Electric Electrode for high-pressure mercury-vapor discharge device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2829297A (en) * 1954-04-15 1958-04-01 Machlett Lab Inc Filament structure

Also Published As

Publication number Publication date
BE479820A (es)
CH273532A (fr) 1951-02-15
GB613847A (en) 1948-12-03
FR957886A (es) 1950-02-28

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