GB490736A - Electric incandescent lamp, especially for air raid precaution purposes - Google Patents

Electric incandescent lamp, especially for air raid precaution purposes

Info

Publication number
GB490736A
GB490736A GB5325/38A GB532538A GB490736A GB 490736 A GB490736 A GB 490736A GB 5325/38 A GB5325/38 A GB 5325/38A GB 532538 A GB532538 A GB 532538A GB 490736 A GB490736 A GB 490736A
Authority
GB
United Kingdom
Prior art keywords
bulb
purposes
filament
lamp
precaution
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
GB5325/38A
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.)
Egyesuelt Izzolampa es Villamossagi Rt
Original Assignee
Egyesuelt Izzolampa es Villamossagi Rt
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 Egyesuelt Izzolampa es Villamossagi Rt filed Critical Egyesuelt Izzolampa es Villamossagi Rt
Publication of GB490736A publication Critical patent/GB490736A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K9/00—Lamps having two or more incandescent bodies separately heated
    • H01K9/02—Lamps having two or more incandescent bodies separately heated to provide substitution in the event of failure of one of the bodies
    • H01K9/04—Lamps having two or more incandescent bodies separately heated to provide substitution in the event of failure of one of the bodies with built-in manually operated switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/26—Screens; Filters

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Radiation-Therapy Devices (AREA)
GB5325/38A 1937-02-19 1938-02-19 Electric incandescent lamp, especially for air raid precaution purposes Expired GB490736A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HU490736X 1937-02-19

Publications (1)

Publication Number Publication Date
GB490736A true GB490736A (en) 1938-08-19

Family

ID=10979345

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5325/38A Expired GB490736A (en) 1937-02-19 1938-02-19 Electric incandescent lamp, especially for air raid precaution purposes

Country Status (4)

Country Link
DE (1) DE717963C (fr)
FR (1) FR833684A (fr)
GB (1) GB490736A (fr)
NL (1) NL50134C (fr)

Also Published As

Publication number Publication date
FR833684A (fr) 1938-10-27
DE717963C (de) 1942-02-26
NL50134C (fr)

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