EP0141402B1 - Méthode de fabrication d'une lampe électrique à incandescence - Google Patents

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

Info

Publication number
EP0141402B1
EP0141402B1 EP84113117A EP84113117A EP0141402B1 EP 0141402 B1 EP0141402 B1 EP 0141402B1 EP 84113117 A EP84113117 A EP 84113117A EP 84113117 A EP84113117 A EP 84113117A EP 0141402 B1 EP0141402 B1 EP 0141402B1
Authority
EP
European Patent Office
Prior art keywords
bulb
bowl
coating
lamp
visible radiation
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
EP84113117A
Other languages
German (de)
English (en)
Other versions
EP0141402A3 (en
EP0141402A2 (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

Links

Images

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 a method for producing an electric light bulb with the features specified in the preamble of the main claim.
  • 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 up to the largest bulb diameter with Si0 2 -containing paste, the bulb tip remaining unsludged.
  • the internal siliconization of lamp bulbs in the dry process is known, in which SiO z powder particles carried by a gas stream are blown into the lamp bulb and bound to the heated bulb glass in the electrostatic field. If the siliconizing layer is to extend only to certain parts of the inner wall of the piston, 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 stainless steel shield is supported with support rods which are anchored in the nozzle area (US Pat. No. 3,279,937).
  • 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.
  • a layer thickness ratio of approximately 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 desired differences in layer density and layer thickness are achieved by means of a circular, flat deflection shield which is arranged above and concentrically with the coating nozzle in the region of the largest piston diameter and divides the powder flow. It is also essential for this method that the piston top of the heated piston is cooled during the coating.
  • a significant further advantage of this new type of coating process is that there is no need to matt the inside of the lamp bulb using hydrofluoric acid, which significantly reduces the environmental impact.
  • 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 second, substantially thinner silicon layer 7, which adjoins the first layer 5 with an essentially sharp-edged transition and which covers the inner wall of the piston crown 6, produces the light-scattering effect.
  • the absorption ratio of the reflective first layer 5 applied on the base side to that of the second layer 7 applied on the piston crown 6 is approximately 6: 1.
  • both layers are applied in one operation in the electrostatic drying process, in which one during approx. 0.45 s air flow with approx.
  • Si02 powder particles 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)

Claims (3)

1. Procédé pour fabriquer une lampe électrique à incandescence comportant une ampoule en verre en forme de champignon, qui comporte, sur sa surface intérieure et entre le col de l'ampoule et la zone du plus grand diamètre de l'ampoule, un revêtement en Si02, qui réfléchit le rayonnement visible, en l'intensifiant, en direction de la calotte de l'ampoule, qui comporte une surface intérieure diffusant le rayonnement visible, et selon lequel, pour réaliser le dépôt du revêtement en Si02, on introduit une buse d'enduction, à laquelle est fixé un bouclier déflecteur, à l'intérieur de l'ampoule de la lampe et on introduit par soufflage des particules de poudre de Si02 entraînées par un courant gazeux, dans une ampoule chauffée, les particules se déposant, dans le champ électrostatique, sur la paroi intérieure de l'ampoule, caractérisé par le fait que la surface intérieure, qui diffuse le rayonnement visible, de la calotte de l'ampoule est également constituée par un revêtement en Si02, qu'on dépose au cours d'une phase opératoire avec le revêtement réfléchissant le rayonnement visible, entre le col de l'ampoule et le plus grand diamètre de cette dernière, auquel cas le bouclier déflecteur est réalisé sous la forme d'un disque circulaire plat qui est disposé concentriquement par rapport à la buse d'enduction et est situé au niveau de la zone du plus grand diamètre de l'ampoule, et la calotte de l'ampoule, qui par ailleurs est chauffée, est refroidie pendant le dépôt du revêtement.
2. Procédé suivant la revendication 1, caractérisé en ce que pour refroidir la calotte de l'ampoule, on place un capot de refroidissement muni d'une bague d'étanchéité, sur la calotte de l'ampoule, cette bague d'étanchéité étant appliquée dans la zone du plus grand diamètre de l'ampoule de la lampe, et on fait circuler un air de soufflage à l'intérieur du capot de refroidissement, ce qui réduit la température de l'ampoule de la lampe, préalablement chauffée à environ 450° K, à environ 300° K dans la zone de la calotte de l'ampoule, balayée par la circulation de l'air de soufflage.
3. Procédé suivant les revendications 1 et 2 caractérisé par le fait que l'air de soufflage circule à l'intérieur du capot de refroidissement à une pression d'environ 2,7 bars, pendant environ 10s.
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
DE3340387 1983-11-08
DE19833340387 DE3340387A1 (de) 1983-11-08 1983-11-08 Elektrische gluehlampe und verfahren zu deren herstellung

Publications (3)

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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3762562D1 (de) * 1986-03-11 1990-06-07 Philips Nv Geblasener lampenkolben und mit einem solchen kolben versehene elektrische lampe.
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.

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PHILIPS Compact lightning catalogues, S. 24-25, Ed. 4/81 *
PHILIPS Produktliste Licht/Batterien 1982/1983 *

Also Published As

Publication number Publication date
DE3472497D1 (en) 1988-08-04
EP0141402A3 (en) 1986-02-12
ATE35482T1 (de) 1988-07-15
DE3340387A1 (de) 1985-05-15
EP0141402A2 (fr) 1985-05-15

Similar Documents

Publication Publication Date Title
EP0299230B1 (fr) Cathode pour une lampe à décharge à haute pression
DE3110811C2 (fr)
EP0141402B1 (fr) Méthode de fabrication d'une lampe électrique à incandescence
DE4132753C2 (de) Farbkathodenstrahlröhre
DE2522243A1 (de) Fluoreszierende anzeigevorrichtung
DE2637754A1 (de) Verfahren zur herstellung einer kathodenstrahlroehre mit einem inneren leitenden ueberzug, vorrichtung zum durchfuehren dieses verfahrens und durch dieses verfahren hergestellte roehre
DE3827451C1 (fr)
DE1064698B (de) Lichtstreuender UEberzug auf der Innenflaeche eines lichtdurchlaessigen Gluehlampenkolbens
DE3320919A1 (de) Niederdruck-quecksilberdampfentladungslampe und verfahren zu ihrer herstellung
DE1921944A1 (de) Kathodenstrahlroehre
DE2512906A1 (de) Verfahren zur fertigung einer bildwiedergaberoehre
DE3736922A1 (de) Lichtstrahlen verschiedener farbe liefernde leuchtstofflampe
DE762566C (de) Elektrische Scheinwerfergluehlampe, deren Lampengefaess aus einer parabolisch geformten und mit Spiegelbelag versehenen dickwandigen Schale aus Glas oder keramischem Werkstoff besteht
DE19603301C2 (de) Elektrische Lampe mit Molybdänfoliendurchführungen für ein Lampengefäß aus Quarzglas
DE2001425A1 (de) Verfahren und Massen zum Abdichten keramischer Lampenkolben
DE3405067A1 (de) Roentgenroehre
DE945366C (de) Vorrichtung zur Herstellung elektrischer Lampen, insbesondere Blitzlichtlampen
DE1921944C (de) Farbbild Kathodenstrahlrohre
DE2553047A1 (de) Elektronenquelle
DE930365C (de) Verfahren und Vorrichtung zur Herstellung einer elektrischen Blitzlicht-lampe und nach diesem Verfahren hergestellte Blitzlichtlampe
DE690696C (de) ltung von Spannungen
DE812093C (de) Verfahren zum Festkitten eines Gegenstandes an einer Wand, z. B. der Wand einer Entladungsroehre
DE2542062C3 (de) Verfahren zum Ausrichten und Befestigen einer Kathodenstrahlröhre
DE19852740A1 (de) Verfahren und Vorrichtung zur Herstellung von glainfiltrierten Keramikgerüsten für künstliche Zähne
DE706698C (de) Anordnung zur Erzeugung ultrakurer Wellen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT DE FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT DE FR GB IT

17P Request for examination filed

Effective date: 19860219

17Q First examination report despatched

Effective date: 19870421

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE FR GB IT

REF Corresponds to:

Ref document number: 35482

Country of ref document: AT

Date of ref document: 19880715

Kind code of ref document: T

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3472497

Country of ref document: DE

Date of ref document: 19880804

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19950920

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19961031

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20021010

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20021023

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20021216

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040501

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20031031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040630

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST