GB239221A - Improvements in and relating to electric incandescent devices - Google Patents

Improvements in and relating to electric incandescent devices

Info

Publication number
GB239221A
GB239221A GB21495/25A GB2149525A GB239221A GB 239221 A GB239221 A GB 239221A GB 21495/25 A GB21495/25 A GB 21495/25A GB 2149525 A GB2149525 A GB 2149525A GB 239221 A GB239221 A GB 239221A
Authority
GB
United Kingdom
Prior art keywords
relating
electric incandescent
incandescent devices
compound
devices
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
GB21495/25A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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
Application filed by British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB239221A publication Critical patent/GB239221A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H01K3/02—Manufacture of incandescent bodies
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Resistance Heating (AREA)

Abstract

239,221. British Thomson-Houston Co., Ltd., (Assignees of Fonda, G. R.). Aug. 30, 1924, [Convention date]. Residual gases. - To prolong the Life of tungsten filaments a zirconium compound is placed within lamp bulbs. The compound may be placed in a capsule 9 secured in the sealing-off tube by means of glasswool 10, or it may be placed loosely in the bulb, or mixed with a binder, for example cellulose acetate, and applied to the filament-supporting or the leading-in wires. Specifications 10918/13 and 182,699 are referred to.
GB21495/25A 1924-08-30 1925-08-27 Improvements in and relating to electric incandescent devices Expired GB239221A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US735074A US1594057A (en) 1924-08-30 1924-08-30 Electric incandescent device

Publications (1)

Publication Number Publication Date
GB239221A true GB239221A (en) 1925-10-22

Family

ID=24954252

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21495/25A Expired GB239221A (en) 1924-08-30 1925-08-27 Improvements in and relating to electric incandescent devices

Country Status (5)

Country Link
US (1) US1594057A (en)
DE (1) DE429115C (en)
FR (1) FR602626A (en)
GB (1) GB239221A (en)
NL (1) NL18450C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3759602A (en) * 1971-08-30 1973-09-18 Gen Electric Inhibiting d-c notching effect in incandescent lamp filaments

Also Published As

Publication number Publication date
NL18450C (en)
US1594057A (en) 1926-07-27
FR602626A (en) 1926-03-23
DE429115C (en) 1926-05-20

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