GB1082841A - Improvements in or relating to electric lamps having vitreous silica envelopes - Google Patents

Improvements in or relating to electric lamps having vitreous silica envelopes

Info

Publication number
GB1082841A
GB1082841A GB3321164A GB3321164A GB1082841A GB 1082841 A GB1082841 A GB 1082841A GB 3321164 A GB3321164 A GB 3321164A GB 3321164 A GB3321164 A GB 3321164A GB 1082841 A GB1082841 A GB 1082841A
Authority
GB
United Kingdom
Prior art keywords
vitreous silica
relating
electric lamps
lamps
mandrel
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
GB3321164A
Inventor
Maurice Hewlett Mounsdon
Stanley Sutton Beggs
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 PLC
Original Assignee
General Electric Co PLC
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 PLC filed Critical General Electric Co PLC
Priority to GB3321164A priority Critical patent/GB1082841A/en
Publication of GB1082841A publication Critical patent/GB1082841A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels

Landscapes

  • Resistance Heating (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

1,082,841. Electric incandenscent lamps; discharge lamps. GENERAL ELECTRIC CO. Ltd. Oct. 6, 1965 [Aug. 14, 1964], No. 33211/64. Headings H1D and H1F. An incandescent lamp or a tubular discharge lamp has an envelope of vitreous silica, one or both surfaces of which is formed with irregularities to increase the diffusion of the light. They may be in the form of indentations or protuberances and may be random or regular, e.g. longitudinal ribs or grooves. These may be formed by drawing the tube while hot over or through a die or mandrel, or, where they are to be formed on both surfaces, between a die and a mandrel. Alternatively, they may be formed by applying suitable tools to the hot surface. A coating of diffusing material may in addition be applied to one or both surfaces or they may be blasted with alumina.
GB3321164A 1964-08-14 1964-08-14 Improvements in or relating to electric lamps having vitreous silica envelopes Expired GB1082841A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3321164A GB1082841A (en) 1964-08-14 1964-08-14 Improvements in or relating to electric lamps having vitreous silica envelopes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3321164A GB1082841A (en) 1964-08-14 1964-08-14 Improvements in or relating to electric lamps having vitreous silica envelopes

Publications (1)

Publication Number Publication Date
GB1082841A true GB1082841A (en) 1967-09-13

Family

ID=10349998

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3321164A Expired GB1082841A (en) 1964-08-14 1964-08-14 Improvements in or relating to electric lamps having vitreous silica envelopes

Country Status (1)

Country Link
GB (1) GB1082841A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3652892A (en) * 1968-11-04 1972-03-28 Tokyo Shibaura Electric Co Illuminating lamp having concave segments on exterior bulb surface
DE2904864A1 (en) * 1978-02-14 1979-08-16 Philips Nv LOW PRESSURE MERCURY VAPOR DISCHARGE LAMP

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3652892A (en) * 1968-11-04 1972-03-28 Tokyo Shibaura Electric Co Illuminating lamp having concave segments on exterior bulb surface
DE2904864A1 (en) * 1978-02-14 1979-08-16 Philips Nv LOW PRESSURE MERCURY VAPOR DISCHARGE LAMP

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