GB202774A - Improvements in and relating to electric incandescent lamps - Google Patents

Improvements in and relating to electric incandescent lamps

Info

Publication number
GB202774A
GB202774A GB1615722A GB1615722A GB202774A GB 202774 A GB202774 A GB 202774A GB 1615722 A GB1615722 A GB 1615722A GB 1615722 A GB1615722 A GB 1615722A GB 202774 A GB202774 A GB 202774A
Authority
GB
United Kingdom
Prior art keywords
filament
carbon
filaments
incandescent lamps
relating
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
GB1615722A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Priority to GB1615722A priority Critical patent/GB202774A/en
Publication of GB202774A publication Critical patent/GB202774A/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
    • H01K1/56—Means for absorbing or absorbing gas, or for preventing or removing efflorescence, e.g. by gettering characterised by the material of the getter

Landscapes

  • Paper (AREA)
  • Inert Electrodes (AREA)

Abstract

202,774. British Thomson-Houston Co., Ltd., (General Electric Co.). June 10, 1922. Addition to 201,629. Residual gases.-Discoloration of the glass of incandescent lamps containing a tungsten filament, as described in the parent Specification, is prevented by applying to the filament carbon, or a solid carbonaceous material, in a finely-divided state. The quantity of carbon usually applied to the filament is about 0.1 per cent by weight of the filament, and is insufficient to change the physical properties of the filament. The filaments may be coated with carbon in various ways, for example, by spraying with water containing graphite in a colloidal form, the filaments being distributed uniformly over a sheet of paper on a rotating hot plate. Red phosphorus may be mixed with the carbon. India ink, lamp black, starch, gum arable, and aniline dyes are given as examples of other carbonaceous substances which may be used.
GB1615722A 1922-06-10 1922-06-10 Improvements in and relating to electric incandescent lamps Expired GB202774A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1615722A GB202774A (en) 1922-06-10 1922-06-10 Improvements in and relating to electric incandescent lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1615722A GB202774A (en) 1922-06-10 1922-06-10 Improvements in and relating to electric incandescent lamps

Publications (1)

Publication Number Publication Date
GB202774A true GB202774A (en) 1923-08-30

Family

ID=10072179

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1615722A Expired GB202774A (en) 1922-06-10 1922-06-10 Improvements in and relating to electric incandescent lamps

Country Status (1)

Country Link
GB (1) GB202774A (en)

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