GB2005657A - Making incandescent lamps - Google Patents

Making incandescent lamps

Info

Publication number
GB2005657A
GB2005657A GB7833706A GB7833706A GB2005657A GB 2005657 A GB2005657 A GB 2005657A GB 7833706 A GB7833706 A GB 7833706A GB 7833706 A GB7833706 A GB 7833706A GB 2005657 A GB2005657 A GB 2005657A
Authority
GB
United Kingdom
Prior art keywords
envelope
exhaust tube
incandescent lamps
pinch
tube
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.)
Granted
Application number
GB7833706A
Other versions
GB2005657B (en
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken 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 Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB2005657A publication Critical patent/GB2005657A/en
Application granted granted Critical
Publication of GB2005657B publication Critical patent/GB2005657B/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
    • H01K3/12—Joining of mount or stem to vessel; Joining parts of the vessel, e.g. by butt sealing

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

In incandescent lamps having a pinched seal surrounding an exhaust tube, it is customary to heat the exhaust tube in situ in the surrounding glass envelope and then to pinch the softened envelope on to the tube. This involves complex heating arrangements. According to the method of invention the envelope (1) and exhaust tube (2) are heated separately by respective burner assemblies (7, 8) and are moved into their relative positions, and the pinch formed, when each has reached the required temperature. This provides a simpler and more rapid manufacturing operation. <IMAGE>
GB7833706A 1977-08-20 1978-08-17 Method of manufacturing electric incandescent lamps Expired GB2005657B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772737681 DE2737681A1 (en) 1977-08-20 1977-08-20 METHOD OF MANUFACTURING ELECTRIC LIGHT BULBS WITH AT LEAST ONE PISTON CRUSH

Publications (2)

Publication Number Publication Date
GB2005657A true GB2005657A (en) 1979-04-25
GB2005657B GB2005657B (en) 1982-02-10

Family

ID=6016950

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7833706A Expired GB2005657B (en) 1977-08-20 1978-08-17 Method of manufacturing electric incandescent lamps

Country Status (5)

Country Link
JP (1) JPS5442876A (en)
DE (1) DE2737681A1 (en)
FR (1) FR2400770A1 (en)
GB (1) GB2005657B (en)
IT (1) IT1098152B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57163946A (en) * 1981-03-31 1982-10-08 Toshiba Corp Manufacture of tubular bulb
DE19621329C1 (en) * 1996-05-28 1997-12-04 Schott Glaswerke Process for producing a lamp and lamp produced by the process
DE19621330C1 (en) * 1996-05-28 1998-01-02 Schott Glaswerke Process for producing a lamp and lamp produced by the process
JP4857456B2 (en) * 2000-05-29 2012-01-18 凸版印刷株式会社 Vacuum deposition system

Also Published As

Publication number Publication date
FR2400770A1 (en) 1979-03-16
GB2005657B (en) 1982-02-10
JPS5442876A (en) 1979-04-05
IT7826805A0 (en) 1978-08-17
IT1098152B (en) 1985-09-07
DE2737681A1 (en) 1979-02-22

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee