CH208438A - Electric light bulb with a 4 atm. excess operating pressure. - Google Patents

Electric light bulb with a 4 atm. excess operating pressure.

Info

Publication number
CH208438A
CH208438A CH208438DA CH208438A CH 208438 A CH208438 A CH 208438A CH 208438D A CH208438D A CH 208438DA CH 208438 A CH208438 A CH 208438A
Authority
CH
Switzerland
Prior art keywords
atm
operating pressure
light bulb
electric light
excess operating
Prior art date
Application number
Other languages
German (de)
Inventor
Gloeilampenfabrieken N Philips
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Publication of CH208438A publication Critical patent/CH208438A/en

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
CH208438D 1937-11-29 1938-11-26 Electric light bulb with a 4 atm. excess operating pressure. CH208438A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE208438X 1937-11-29

Publications (1)

Publication Number Publication Date
CH208438A true CH208438A (en) 1940-01-31

Family

ID=5794241

Family Applications (1)

Application Number Title Priority Date Filing Date
CH208438D CH208438A (en) 1937-11-29 1938-11-26 Electric light bulb with a 4 atm. excess operating pressure.

Country Status (5)

Country Link
US (1) US2203896A (en)
BE (1) BE431317A (en)
CH (1) CH208438A (en)
FR (1) FR846696A (en)
GB (1) GB502078A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2749462A (en) * 1952-05-31 1956-06-05 Gen Electric High pressure mercury vapor lamp with zirconium getter
US3149716A (en) * 1959-09-29 1964-09-22 Dick Co Ab Evaporator vacuum pump
US3133224A (en) * 1960-11-25 1964-05-12 Gen Electric Electric discharge device
US3167678A (en) * 1961-06-19 1965-01-26 Gen Electric Getter operating at various temperatures to occlude various gases
DE2659609A1 (en) * 1976-12-30 1978-07-20 Patra Patent Treuhand ELECTRIC LIGHT BULB
US5128106A (en) * 1990-07-12 1992-07-07 Gte Products Corporation Lamp with an oxygen detector
EP2665046A1 (en) * 2012-05-18 2013-11-20 Proindumar S.L. Self-turning device with the ability to mix and identify balls, located in a portable compartment with auxiliary control elements

Also Published As

Publication number Publication date
GB502078A (en) 1939-03-10
BE431317A (en)
US2203896A (en) 1940-06-11
FR846696A (en) 1939-09-21

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