GB1004869A - Improvements in sodium-vapour discharge lamps - Google Patents

Improvements in sodium-vapour discharge lamps

Info

Publication number
GB1004869A
GB1004869A GB39449/61A GB3944961A GB1004869A GB 1004869 A GB1004869 A GB 1004869A GB 39449/61 A GB39449/61 A GB 39449/61A GB 3944961 A GB3944961 A GB 3944961A GB 1004869 A GB1004869 A GB 1004869A
Authority
GB
United Kingdom
Prior art keywords
layer
envelope
gold
discharge tube
sodium
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
GB39449/61A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1004869A publication Critical patent/GB1004869A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/35—Vessels; Containers provided with coatings on the walls thereof; Selection of materials for the coatings

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

1,004,869. Discharge lamps. PHILIPS ELECTRONIC ASSOCIATED INDUSTRIES Ltd. Nov. 3, 1961 [Nov. 7, l960] No. 39449/61. Heading H1D. A sodium vapour-rare gas discharge lamp comprises a discharge tube 1 enclosed in a transparent envelope 3, wherein a layer of gold, for reflecting infra-red light, is supported on a surface disposed within the envelope 3, the thickness of the layer is from 60 A to 300 A, preferably from 100 A to 180 A, the specific resistivity of the layer is not more than 2.2 x 10<SP>-5</SP> ohm cm., and wherein in operation the surface loading of the discharge tube is less than 0À35 watts/sq.cm., preferably less than 0À25 watts/sq.cm. The gold layer can be on the inner surface of the envelope 3 or on a transparent cylinder 4 between the discharge tube 1 and the envelope 3. The gold layer can be formed by deposition from vapour in a vacuum using a gold-coated molybdenum wire.
GB39449/61A 1960-11-07 1961-11-03 Improvements in sodium-vapour discharge lamps Expired GB1004869A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEN19153A DE1147316B (en) 1960-11-07 1960-11-07 Sodium Discharge Lamp

Publications (1)

Publication Number Publication Date
GB1004869A true GB1004869A (en) 1965-09-15

Family

ID=7340791

Family Applications (1)

Application Number Title Priority Date Filing Date
GB39449/61A Expired GB1004869A (en) 1960-11-07 1961-11-03 Improvements in sodium-vapour discharge lamps

Country Status (4)

Country Link
DE (1) DE1147316B (en)
GB (1) GB1004869A (en)
NL (1) NL270957A (en)
OA (1) OA00753A (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE613900C (en) * 1933-06-27 1935-05-28 Patra Patent Treuhand Double-walled electric light tube
DE1761684U (en) * 1956-02-03 1958-02-20 Philips Nv ELECTRIC DISCHARGE TUBE.

Also Published As

Publication number Publication date
DE1147316B (en) 1963-04-18
NL270957A (en)
OA00753A (en) 1967-07-15

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