GB477758A - Improvements in and relating to electric incandescent lamps - Google Patents

Improvements in and relating to electric incandescent lamps

Info

Publication number
GB477758A
GB477758A GB1993437A GB1993437A GB477758A GB 477758 A GB477758 A GB 477758A GB 1993437 A GB1993437 A GB 1993437A GB 1993437 A GB1993437 A GB 1993437A GB 477758 A GB477758 A GB 477758A
Authority
GB
United Kingdom
Prior art keywords
electric incandescent
incandescent lamps
relating
bulb
electric
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
GB1993437A
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.)
MASASUKE IMURA
Original Assignee
MASASUKE IMURA
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 MASASUKE IMURA filed Critical MASASUKE IMURA
Priority to GB1993437A priority Critical patent/GB477758A/en
Publication of GB477758A publication Critical patent/GB477758A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/52—Means for obtaining or maintaining the desired pressure within the vessel
    • H01K1/54—Means for absorbing or absorbing gas, or for preventing or removing efflorescence, e.g. by gettering
    • 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)
  • Optical Elements Other Than Lenses (AREA)

Abstract

477,758. Electric incandescent lamps with internal reflectors. IMURA, M. July 19, 1937, No. 19934. Drawings to Specification. [Class 39 (ii)] An electric incandescent lamp is provided with a concave mirror or reflector made of calcium or magnesium which is mounted above the filament within the bulb. These materials absorb any water vapour or oxygen present within the bulb.
GB1993437A 1937-07-19 1937-07-19 Improvements in and relating to electric incandescent lamps Expired GB477758A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1993437A GB477758A (en) 1937-07-19 1937-07-19 Improvements in and relating to electric incandescent lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1993437A GB477758A (en) 1937-07-19 1937-07-19 Improvements in and relating to electric incandescent lamps

Publications (1)

Publication Number Publication Date
GB477758A true GB477758A (en) 1938-01-05

Family

ID=10137562

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1993437A Expired GB477758A (en) 1937-07-19 1937-07-19 Improvements in and relating to electric incandescent lamps

Country Status (1)

Country Link
GB (1) GB477758A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2321727A1 (en) * 1972-04-27 1973-11-08 Minnesota Mining & Mfg VEHICLE HEADLIGHTS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2321727A1 (en) * 1972-04-27 1973-11-08 Minnesota Mining & Mfg VEHICLE HEADLIGHTS

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