EP0141402A2 - Méthode de fabrication d'une lampe électrique à incandescence - Google Patents

Méthode de fabrication d'une lampe électrique à incandescence Download PDF

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Publication number
EP0141402A2
EP0141402A2 EP84113117A EP84113117A EP0141402A2 EP 0141402 A2 EP0141402 A2 EP 0141402A2 EP 84113117 A EP84113117 A EP 84113117A EP 84113117 A EP84113117 A EP 84113117A EP 0141402 A2 EP0141402 A2 EP 0141402A2
Authority
EP
European Patent Office
Prior art keywords
bulb
layer
lamp
light
siliconizing
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
EP84113117A
Other languages
German (de)
English (en)
Other versions
EP0141402A3 (en
EP0141402B1 (fr
Inventor
Kurt Schönsee
Joachim Oehmke
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
Priority to AT84113117T priority Critical patent/ATE35482T1/de
Publication of EP0141402A2 publication Critical patent/EP0141402A2/fr
Publication of EP0141402A3 publication Critical patent/EP0141402A3/de
Application granted granted Critical
Publication of EP0141402B1 publication Critical patent/EP0141402B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels
    • H01K1/32—Envelopes; Vessels provided with coatings on the walls; Vessels or coatings thereon characterised by the material thereof

Definitions

  • the invention relates to an electric incandescent lamp with a mushroom-shaped lamp bulb made of glass, which is provided with an inner silicon layer which is arranged between the bulb neck and the largest bulb diameter and which reflects the light to the bulb tip, the bulb tip having a light-scattering surface, and a method for producing the lamp .
  • the light-scattering surface of the bulb top is usually produced by hydrofluoric acid matting of the lamp bulb. Internal siliciding is currently carried out using the wet process. Pre-matted standing lamp bulbs are slurried with TiOp-containing paste up to the largest bulb diameter, whereby the bulb cap remains unsludged.
  • the internal siliconization of lamp bulbs in the dry process is known, in which Si0 2 powder particles carried by a gas stream are blown into the lamp bulb and bonded to the heated bulb glass in the electrostatic field. If the siliconizing layer only on certain parts of the inner wall of the piston to extend, these deflecting means can be arranged in the gas stream carrying the powder particles.
  • a circular deflection shield is mounted, the side of which facing away from the coating nozzle is flat, while the side facing the nozzle has a convex shape.
  • the deflection shield lies above the coating nozzle and is arranged concentrically with it.
  • the shield is supported with supporting rods which are anchored in the nozzle area and is made of stainless steel (US-PS 3 2 79 937).
  • the object of the invention is to make an electric incandescent lamp of the type described in the introduction simpler in construction and method of manufacture.
  • the object is achieved with the features listed in the characterizing part of claim 1.
  • the transition from one layer to the other is essentially sharp.
  • the absorption ratio of the first inner siliconization layer, which reflects the light to the piston crown, to the second inner siliconization layer applied to the piston crown is in the range from 3: 1 to 15: 1.
  • a layer thickness ratio of approx. 6: 1 (reflective first layer: light-scattering second layer ) has proven to be particularly advantageous.
  • the layers are applied in one operation using the electrostatic method, a high voltage potential being applied between the lamp bulb and the coating nozzle.
  • the lamp according to FIG. 1 has a mushroom-shaped lamp bulb 1, a base 2 and a luminous element 4 held in a frame 3.
  • the lamp bulb 1 is provided on its inner surface with a first siliconizing layer 5, which extends from the bulb neck to the largest bulb diameter and reflects the light increasingly toward the bulb cap 6.
  • the absorption ratio of the reflective first layer 5 applied on the base side to the thin second layer 7 applied on the piston crown 6 is preferably approximately 6: 1.
  • both layers are applied in one operation in the electrostatic drying process, at the Si0 2 powder particles carried by an air stream at approx.
  • 3.3 bar for approx. 0.45 s are blown into the lamp bulb 1 and deposited in the electrostatic field on the inner wall of the glass bulb.
  • a high voltage of approximately 20 kV is present between the heated lamp bulb 1 and the coating nozzle 8.
  • the distribution of the layer densities and layer thicknesses is achieved by means of a cooling cap 9 and a circular, flat deflection plate 10.
  • the piston tip 6 is cooled for about 10 s with blown air 11 of about 2.7 bar.
  • the cooling cap 9 is placed on the lamp bulb 1, which extends down to the height of the largest bulb diameter and is sealed with a rubber ring 12.
  • the blown air 11 escapes through an opening 13 made in the cooling cap 9.
  • the deflection plate is arranged inside the lamp bulb 1 above and concentrically with the coating nozzle 8, likewise at about the height of the largest bulb diameter.
  • the lamp bulb 1, which was heated to about 450 K before the start of siliconizing, is kept at a temperature of about 300 K during the siliconizing in the area of the bulb top 6, while the rest of the bulb part has about 420 K.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Glass Compositions (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
EP84113117A 1983-11-08 1984-10-31 Méthode de fabrication d'une lampe électrique à incandescence Expired EP0141402B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84113117T ATE35482T1 (de) 1983-11-08 1984-10-31 Verfahren zur herstellung einer elektrischen gluehlampe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833340387 DE3340387A1 (de) 1983-11-08 1983-11-08 Elektrische gluehlampe und verfahren zu deren herstellung
DE3340387 1983-11-08

Publications (3)

Publication Number Publication Date
EP0141402A2 true EP0141402A2 (fr) 1985-05-15
EP0141402A3 EP0141402A3 (en) 1986-02-12
EP0141402B1 EP0141402B1 (fr) 1988-06-29

Family

ID=6213767

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84113117A Expired EP0141402B1 (fr) 1983-11-08 1984-10-31 Méthode de fabrication d'une lampe électrique à incandescence

Country Status (3)

Country Link
EP (1) EP0141402B1 (fr)
AT (1) ATE35482T1 (fr)
DE (2) DE3340387A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0237104A1 (fr) * 1986-03-11 1987-09-16 Koninklijke Philips Electronics N.V. Ampoule de lampe soufflée et lampe électrique pourvue d'une telle ampoule
WO1991010256A1 (fr) * 1989-12-22 1991-07-11 Gte Products Corporation Ampoule au tungstene-halogene dotee d'un reflecteur aluminise et procede de fabrication

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1999014A (en) * 1931-01-21 1935-04-23 Hygrade Sylvania Corp Manufacture of incandescent electric lamps
US2449268A (en) * 1947-05-29 1948-09-14 Sylvania Electric Prod Electric lamp
US4081709A (en) * 1975-11-20 1978-03-28 General Electric Company Electrostatic coating of silica powders on incandescent bulbs
NL7905367A (nl) * 1979-07-10 1981-01-13 Philips Nv Elektrische lamp met een ten dele verspiegeld lampvat.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0237104A1 (fr) * 1986-03-11 1987-09-16 Koninklijke Philips Electronics N.V. Ampoule de lampe soufflée et lampe électrique pourvue d'une telle ampoule
WO1991010256A1 (fr) * 1989-12-22 1991-07-11 Gte Products Corporation Ampoule au tungstene-halogene dotee d'un reflecteur aluminise et procede de fabrication

Also Published As

Publication number Publication date
ATE35482T1 (de) 1988-07-15
EP0141402A3 (en) 1986-02-12
DE3472497D1 (en) 1988-08-04
DE3340387A1 (de) 1985-05-15
EP0141402B1 (fr) 1988-06-29

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