EP0123844A2 - Lampe de projection à incandescence à bas voltage - Google Patents

Lampe de projection à incandescence à bas voltage Download PDF

Info

Publication number
EP0123844A2
EP0123844A2 EP84102813A EP84102813A EP0123844A2 EP 0123844 A2 EP0123844 A2 EP 0123844A2 EP 84102813 A EP84102813 A EP 84102813A EP 84102813 A EP84102813 A EP 84102813A EP 0123844 A2 EP0123844 A2 EP 0123844A2
Authority
EP
European Patent Office
Prior art keywords
filament
pitch
helix
low
voltage halogen
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
EP84102813A
Other languages
German (de)
English (en)
Other versions
EP0123844A3 (en
EP0123844B1 (fr
Inventor
Axel Bunk
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP0123844A2 publication Critical patent/EP0123844A2/fr
Publication of EP0123844A3 publication Critical patent/EP0123844A3/de
Application granted granted Critical
Publication of EP0123844B1 publication Critical patent/EP0123844B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/02—Incandescent bodies
    • H01K1/14—Incandescent bodies characterised by the shape

Definitions

  • the invention relates to a low-voltage halogen projection light bulb with a filament filament made of tungsten.
  • a filament filament made of tungsten.
  • the object of the invention is to provide a lamp according to the preamble of claim 1, which has a temperature distribution along the filament, which allows the desired increase in luminous flux without problems.
  • the low-voltage halogen projection light bulb (FIG. 1) has a bulb 1 made of quartz or Vycor e , is filled with inert gas with halogen addition, has a pump tip 2 at one end and is closed by squeezing at the other end.
  • a coiled filament 3 made of tungsten (FIGS. 2, 3) is carried by tungsten current feeds 4, which are welded to molybdenum foils 5 and connected to external current feed pins 6 via these.
  • the filament filament 3 can be used as Flat core or round core helix.
  • the slope of the filament filament 3 is dimensioned such that it is smaller at the filament ends than in the filament middle part.
  • the value of the helix pitch of the helical central portion a M M is taken from the area 1,4 ⁇ a M ⁇ 2,2.
  • the helix pitch can increase either gradually or continuously from the helix ends to the helix center.
  • a more uniform temperature curve along the filament (curve 1) compared to the temperature curve with constant filament pitch (curve 2) results, as shown in FIG. 4, whose abscissa represents the number of turns W and the ordinate represents the filament temperature T.
  • the switch-on strength criterion is informal.

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  • Resistance Heating (AREA)
EP84102813A 1983-04-25 1984-03-15 Lampe de projection à incandescence à bas voltage Expired EP0123844B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19838312136U DE8312136U1 (de) 1983-04-25 1983-04-25 Niedervolt-halogen-projektionsgluehlampe
DE8312136U 1983-04-25

Publications (3)

Publication Number Publication Date
EP0123844A2 true EP0123844A2 (fr) 1984-11-07
EP0123844A3 EP0123844A3 (en) 1985-11-21
EP0123844B1 EP0123844B1 (fr) 1989-10-18

Family

ID=6752679

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84102813A Expired EP0123844B1 (fr) 1983-04-25 1984-03-15 Lampe de projection à incandescence à bas voltage

Country Status (2)

Country Link
EP (1) EP0123844B1 (fr)
DE (2) DE8312136U1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001091161A1 (fr) * 2000-05-23 2001-11-29 Illumination Technology, Inc. Lampe a incandescence basse tension avec filament a pas variable
US6690103B1 (en) 1999-07-21 2004-02-10 Alan K. Uke Incandescent light bulb with variable pitch coiled filament
EP1628326A3 (fr) * 2004-08-19 2006-11-29 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampe à incandescence pour phare de véhicule

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR673811A (fr) * 1928-04-21 1930-01-20 Lampes Sa Perfectionnements aux filaments pour lampes à incandescence
NL43358C (fr) * 1928-08-01
NL288858A (fr) * 1962-09-11

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6690103B1 (en) 1999-07-21 2004-02-10 Alan K. Uke Incandescent light bulb with variable pitch coiled filament
WO2001091161A1 (fr) * 2000-05-23 2001-11-29 Illumination Technology, Inc. Lampe a incandescence basse tension avec filament a pas variable
EP1628326A3 (fr) * 2004-08-19 2006-11-29 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampe à incandescence pour phare de véhicule
US7456558B2 (en) 2004-08-19 2008-11-25 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Electric incandescent lamp provided with different pitch factors for each end of a filament component

Also Published As

Publication number Publication date
EP0123844A3 (en) 1985-11-21
DE3480246D1 (en) 1989-11-23
EP0123844B1 (fr) 1989-10-18
DE8312136U1 (de) 1984-10-04

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