GB447428A - Improvements relating to electric lamps - Google Patents

Improvements relating to electric lamps

Info

Publication number
GB447428A
GB447428A GB35343/34A GB3534334A GB447428A GB 447428 A GB447428 A GB 447428A GB 35343/34 A GB35343/34 A GB 35343/34A GB 3534334 A GB3534334 A GB 3534334A GB 447428 A GB447428 A GB 447428A
Authority
GB
United Kingdom
Prior art keywords
lamp
resistance
filament
mercury
voltage
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
GB35343/34A
Other languages
English (en)
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.)
WILLIAM HENRY LE MARECHAL
Siemens Electric Lamps and Supplies Ltd
Original Assignee
WILLIAM HENRY LE MARECHAL
Siemens Electric Lamps and Supplies 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
Priority to BE412488D priority Critical patent/BE412488A/xx
Priority to NL42973D priority patent/NL42973C/xx
Application filed by WILLIAM HENRY LE MARECHAL, Siemens Electric Lamps and Supplies Ltd filed Critical WILLIAM HENRY LE MARECHAL
Priority to GB35343/34A priority patent/GB447428A/en
Priority to US51758A priority patent/US2112993A/en
Priority to DES120616D priority patent/DE679111C/de
Publication of GB447428A publication Critical patent/GB447428A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H05B41/46—Circuits providing for substitution in case of failure of the lamp
    • 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

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Discharge Lamp (AREA)
GB35343/34A 1934-12-08 1934-12-08 Improvements relating to electric lamps Expired GB447428A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE412488D BE412488A (da) 1934-12-08
NL42973D NL42973C (da) 1934-12-08
GB35343/34A GB447428A (en) 1934-12-08 1934-12-08 Improvements relating to electric lamps
US51758A US2112993A (en) 1934-12-08 1935-11-27 Electric lamp
DES120616D DE679111C (de) 1934-12-08 1935-11-29 Elektrische Leuchte, bestehend aus einer Hochdrucklampe mit in Reihe geschaltetem Metallgluehfaden

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB35343/34A GB447428A (en) 1934-12-08 1934-12-08 Improvements relating to electric lamps

Publications (1)

Publication Number Publication Date
GB447428A true GB447428A (en) 1936-05-19

Family

ID=10376670

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35343/34A Expired GB447428A (en) 1934-12-08 1934-12-08 Improvements relating to electric lamps

Country Status (5)

Country Link
US (1) US2112993A (da)
BE (1) BE412488A (da)
DE (1) DE679111C (da)
GB (1) GB447428A (da)
NL (1) NL42973C (da)

Also Published As

Publication number Publication date
US2112993A (en) 1938-04-05
BE412488A (da)
DE679111C (de) 1939-07-29
NL42973C (da)

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