GB191202468A - Improvements in and relating to Electric Incandescent Lamps. - Google Patents

Improvements in and relating to Electric Incandescent Lamps.

Info

Publication number
GB191202468A
GB191202468A GB191202468DA GB191202468A GB 191202468 A GB191202468 A GB 191202468A GB 191202468D A GB191202468D A GB 191202468DA GB 191202468 A GB191202468 A GB 191202468A
Authority
GB
United Kingdom
Prior art keywords
tungsten
filaments
exhaustion
lamps
compounds
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
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
Application granted granted Critical
Publication of GB191202468A publication Critical patent/GB191202468A/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
    • 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

  • Resistance Heating (AREA)

Abstract

2468. British Thomson-Houston Co., [General Electric Co.]. Jan. 30. Residual gases. - Lamps with filaments of tungsten or molybdenum contain volatile compounds of these metals such as are decomposed at the incandescent filaments but are reformed from their elements at the temperature inside the bulb to prevent blackening. The pressure of the gases is less than 0À01 mm. and usually less than 0À001 mm. of mercury, and is such that the deposition on the filaments balances the scattering from them. Halogen compounds may be used, such as tungsten hexachloride, oxytetrachloride, or dioxydichloride; or similar compounds of other halogens. They may be introduced before exhaustion, in excess; or after exhaustion, by sublimation; or they may be produced inside the lamps by heating a little tungsten in chlorine. Water-vapour is removed during exhaustion; or afterwards by introducing the halogen compounds preliminarily and condensing-out with liquid-air. The leading-in wires may be of tungsten or platinum. Specification 15,621/10 is referred to.
GB191202468D 1912-01-30 1912-01-30 Improvements in and relating to Electric Incandescent Lamps. Expired GB191202468A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191202468T 1912-01-30

Publications (1)

Publication Number Publication Date
GB191202468A true GB191202468A (en) 1913-01-30

Family

ID=32569769

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191202468D Expired GB191202468A (en) 1912-01-30 1912-01-30 Improvements in and relating to Electric Incandescent Lamps.

Country Status (2)

Country Link
FR (1) FR452472A (en)
GB (1) GB191202468A (en)

Also Published As

Publication number Publication date
FR452472A (en) 1913-05-17

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