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GB531844A - Improvements in means for illumination comprising both an electric discharge device and an incandescent filament - Google Patents

Improvements in means for illumination comprising both an electric discharge device and an incandescent filament

Info

Publication number
GB531844A
GB531844A GB2253839A GB2253839A GB531844A GB 531844 A GB531844 A GB 531844A GB 2253839 A GB2253839 A GB 2253839A GB 2253839 A GB2253839 A GB 2253839A GB 531844 A GB531844 A GB 531844A
Authority
GB
United Kingdom
Prior art keywords
electrode
discharge device
discharge
illumination
electric discharge
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
GB2253839A
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft 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 Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Priority to GB2253839A priority Critical patent/GB531844A/en
Publication of GB531844A publication Critical patent/GB531844A/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
    • H01J61/96—Lamps with light-emitting discharge path and separately-heated incandescent body within a common envelope, e.g. for simulating daylight

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

531,844. Discharge tamps. GENERAL ELECTRIC CO., Ltd. (Patent-Treuhand-Ges. fur Electrische Gluhlampen.). Aug. 3, 1939, No. 22538. Addition to 485,954.. [Class 39 (i)] In a lamp as described in the parent Specification, an electrode of the discharge device is heated independently of the discharge by connecting the electrode or an indirectly heating element therefore in series with the parallel connected filament. A thermally operated switch or a resistor whose conductivity rises rapidly with temperature may be connected across the electrode or its heating element, so that the heating of the electrode ceases when the full operating condition of the discharge device is attained.
GB2253839A 1939-08-03 1939-08-03 Improvements in means for illumination comprising both an electric discharge device and an incandescent filament Expired GB531844A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2253839A GB531844A (en) 1939-08-03 1939-08-03 Improvements in means for illumination comprising both an electric discharge device and an incandescent filament

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2253839A GB531844A (en) 1939-08-03 1939-08-03 Improvements in means for illumination comprising both an electric discharge device and an incandescent filament

Publications (1)

Publication Number Publication Date
GB531844A true GB531844A (en) 1941-01-13

Family

ID=10181021

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2253839A Expired GB531844A (en) 1939-08-03 1939-08-03 Improvements in means for illumination comprising both an electric discharge device and an incandescent filament

Country Status (1)

Country Link
GB (1) GB531844A (en)

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