CH218223A - Electric low pressure fluorescent tube and process for their manufacture. - Google Patents

Electric low pressure fluorescent tube and process for their manufacture.

Info

Publication number
CH218223A
CH218223A CH218223DA CH218223A CH 218223 A CH218223 A CH 218223A CH 218223D A CH218223D A CH 218223DA CH 218223 A CH218223 A CH 218223A
Authority
CH
Switzerland
Prior art keywords
manufacture
low pressure
fluorescent tube
electric low
pressure fluorescent
Prior art date
Application number
Other languages
German (de)
Inventor
F Patent-Treuhand-Gesellschaft
Original Assignee
Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh
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 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh filed Critical Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh
Publication of CH218223A publication Critical patent/CH218223A/en

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
    • 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
    • H05B41/23—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 not having an auxiliary starting electrode
    • H05B41/232—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 not having an auxiliary starting electrode for low-pressure lamps
    • H05B41/2325—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 not having an auxiliary starting electrode for low-pressure lamps provided with pre-heating electrodes
CH218223D 1940-05-04 1941-04-29 Electric low pressure fluorescent tube and process for their manufacture. CH218223A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE218223X 1940-05-04

Publications (1)

Publication Number Publication Date
CH218223A true CH218223A (en) 1941-11-30

Family

ID=5831184

Family Applications (1)

Application Number Title Priority Date Filing Date
CH218223D CH218223A (en) 1940-05-04 1941-04-29 Electric low pressure fluorescent tube and process for their manufacture.

Country Status (4)

Country Link
BE (1) BE437143A (en)
CH (1) CH218223A (en)
FR (1) FR869463A (en)
GB (1) GB523924A (en)

Also Published As

Publication number Publication date
FR869463A (en) 1942-02-03
BE437143A (en)
GB523924A (en) 1940-07-25

Similar Documents

Publication Publication Date Title
CH223415A (en) Electric discharge tube with quartz wall.
CH207131A (en) Electric discharge tube.
CH249958A (en) Electron-emitting electrode for electric discharge tubes.
CH200824A (en) Electric discharge tube.
CH212515A (en) Electric discharge tube.
CH220323A (en) Fixed electrode barrier electrode system and process for its manufacture.
CH230972A (en) Cathode ray tube and process for making the same.
CH233012A (en) Apparatus comprising an electric discharge tube with an electron mirror electrode.
CH218223A (en) Electric low pressure fluorescent tube and process for their manufacture.
CH224493A (en) Process for the production of an indirectly heated cathode for electrical discharge tubes and cathode produced according to this process.
CH201751A (en) Electric discharge tube.
AT134016B (en) Electric discharge tube.
CH224049A (en) Electric discharge tube.
CH228317A (en) Oxide cathode and process for its manufacture.
CH204073A (en) Electric discharge tube.
CH245531A (en) Electric lamp.
CH221735A (en) Gas-filled electric light bulb for series connection.
CH207012A (en) Process for the manufacture of highly evacuated electrical discharge tubes.
CH233036A (en) Lamp base for an electric incandescent lamp, a discharge tube and the like, and a method for its manufacture.
CH210910A (en) Electric discharge tube.
CH209456A (en) Electric discharge tube.
CH208243A (en) Electric discharge tube.
CH225051A (en) Process for the manufacture of electric discharge tubes which contain an electrode with a photoelectric surface.
CH225065A (en) Process for the production of electrodes for electric cathode glow lamps or tubes.
CH240674A (en) Barrier cell and method of making it.