EP0940840A1 - Elektrode mit Wendelaufsatz - Google Patents
Elektrode mit Wendelaufsatz Download PDFInfo
- Publication number
- EP0940840A1 EP0940840A1 EP99101969A EP99101969A EP0940840A1 EP 0940840 A1 EP0940840 A1 EP 0940840A1 EP 99101969 A EP99101969 A EP 99101969A EP 99101969 A EP99101969 A EP 99101969A EP 0940840 A1 EP0940840 A1 EP 0940840A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- core pin
- wart
- electrode
- electrode according
- coil body
- 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
Links
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000004020 conductor Substances 0.000 claims abstract description 3
- 238000002844 melting Methods 0.000 claims abstract description 3
- 201000010153 skin papilloma Diseases 0.000 claims description 56
- 208000000260 Warts Diseases 0.000 claims description 55
- 239000000463 material Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- 239000006228 supernatant Substances 0.000 claims 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
- 229910052736 halogen Inorganic materials 0.000 description 5
- 150000002367 halogens Chemical class 0.000 description 5
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 4
- 229910052721 tungsten Inorganic materials 0.000 description 4
- 239000010937 tungsten Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 241001295925 Gegenes Species 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
- H01J61/06—Main electrodes
- H01J61/073—Main electrodes for high-pressure discharge lamps
- H01J61/0732—Main electrodes for high-pressure discharge lamps characterised by the construction of the electrode
Definitions
- the invention is based on an electrode according to the preamble of the claim 1. These are in particular electrodes for High pressure discharge lamps, but also around holders for the coiled Filament of a light bulb.
- WO 95/30237 describes a high-pressure discharge lamp for small lamp outputs known, the electrode equipped with a non-circular core pin is.
- the irregular or symmetrical deformations of the Core pin extend over the entire area of the core pin to the the coil is pushed on. They have to be elaborate using a grinding process getting produced.
- Such a core pin is very difficult to manufacture if you consider that the diameter of the core pin is only in is of the order of 150 to 700 ⁇ m. Mechanical processing of such a small core pin due to the grinding process described very complex and with a high level of rejects.
- the electrode according to the invention is made of high-melting, electrically conductive Material, preferably tungsten, but also molybdenum or Tantalum is an option.
- the electrode consists of a core pin, which is normally has a cylindrical cross-section, but also elliptical or flattened can be. A spiral body is pushed onto the end of this core pin. It can protrude at the tip of the core pin or in front of it already end.
- This filament can be used in high pressure discharge lamps either regulate the heat balance of the electrode or it serves as a holder for one inserted between the turns of the coil body Emitter material.
- the electrode is designed as an internal power supply. The postponed The filament is the end of the filament.
- a wart protruding over the diameter of the core pin is formed.
- a typical value for the protrusion of the wart is 10 ⁇ m.
- a second wart on the one opposite the first wart is advantageous Side of the core pin arranged. This will hold the coil body improved.
- the second wart is preferred over the first wart staggered so that the distance between the two Warts in the longitudinal axis measured on the geometry of the coil body is coordinated. If the coil body is wound without a pitch, so that the individual turns touching is the displacement of the second Warts by half a wire diameter of the coil body especially suitable. If the coil body is wound with a slope, so that the individual Turns are spaced, it is recommended that the two warts are offset from each other by a half slope of the helix. In this way it is always ensured that the coil body between the two warts clicks into place and is optimally held there.
- a particularly secure holder is an electrode for a high-pressure discharge lamp achieved when the wart (s) approximately in the middle of the coil body is or are arranged.
- the coil body is simply coiled and consists of about four to ten turns.
- the self-holding power such a coil body by spring action is relatively small.
- a typical value is 10 to 30 ⁇ m.
- the double coiled filaments are often used Ends of the filament used. These have a great spring effect with high self-holding power, so that here a relatively small overhang (5 to 10 ⁇ m) is sufficient.
- This holding system based on warts on the core pin is particularly suitable for lamps of low wattage, for example between 35 and 150 W. At The electrodes of these lamps are very small and difficult to mechanically to edit. Typical diameters of the core pin are around 150 to 1000 ⁇ m. In principle, the holding system presented here is also for larger ones Diameter of the core pin, for example up to 5 mm, is still suitable.
- the wire diameter of the coil body is preferably about 10 to 50% of the diameter of the core pin.
- the coil body has a secure hold on the core pin the protrusion of the wart over the core pin is about 5 to 30 um amounts to.
- the diameter of the wire for the coil body is in the On the order of 50 to 500 ⁇ m.
- the particular advantage of the invention Holding technique is that the use of two offset warts, their Distance are matched to the turns of the coil body, it allows to achieve an optimal holding effect without great effort.
- the It is easy and reliable to thread the coil body. All in all this holding technique can be automated very easily and is with little rejects because the increase in the size of the core pin it can be kept relatively small in the area of the individual wart possible to create them with a simple trick.
- a particularly suitable method for producing an electrode such as Described above is that a core pin is on the side with a laser beam is bombarded so that the material of the core pin melts locally and forms a wart, then the coil body over the wart is pushed onto the core pin.
- This procedure can be done easily be modified (for example by means of a beam splitter) that a core pin is simultaneously bombarded with a laser beam from two sides, so that two warts are formed.
- the laser beam i.a. an Nd: YAG laser high power and with a wavelength of 1064 nm, the focused location of the core pin intended for the formation of the wart.
- the Power of the laser is adjusted so that the material of the core pin melts and a dome (wart) due to the surface tension forms, which often lies in a depression.
- the material of the core pin neither removed nor added. It will only rearranged.
- the depression formed around the wart is however so narrow that the spiral body does not notice the depression, but instead feel the protrusion of the wart very well.
- the Helical body pressed into the recesses of the core pin produced thereby become.
- the notches or flats are symmetrical, see above that because of the displacement of the turns of the helix only a part of the Helix body is well anchored in the notch or flat.
- the diameter of the core pin is now more punctiform enlarged by the wart.
- the slid-on coil body can easily Glide over the wart if he applies the appropriate force to the core pin is applied. The force required for this can be measured and evaluated and are used as a test measure for any sorting out.
- there is particularly good toothing of the coil body with the core pin because here there is a vote between the core pin and the geometry of the spiral body.
- the holding technology according to the invention enables a non-contact and thus particularly gentle treatment of the core pin when forming the Warts. This is particularly important when using tungsten as a material Advantage, since tungsten is known to be very brittle.
- the positive connection between Core pin and coil body can - especially because of the teeth with two warts - also without great effort.
- a typical value of the force to be applied is about 10 N.
- a high load of the brittle core pin is thus avoided twice: the first Time when the wart was created, the second time when the Spiral body.
- a typical value for the material turnover when forming a wart is about 20% of the disk-shaped volume involved. For larger values of the diameter of the core pin this value decreases. About a certain Value range of the diameter can be this value of the material turnover can be readjusted by an increased laser power. Typical values of the Laser power is 5 to 50 J.
- FIG. 1 shows a metal halide lamp 1 with an output of 35 W. with a discharge vessel 2 closed on two sides made of ceramic.
- Two external power leads 5 are sealed in the plugs 3 by means of glass solder 4, which are connected to electrodes 6 in the interior of the discharge vessel are.
- the electrodes 6 consist of core pins 7, on which a coil body 8 is postponed. Both components are made of tungsten.
- the diameter the core pin is 150 microns, that of the coil body 8 is 50 microns.
- FIG 2a shows an enlarged view of the electrode 6.
- the coil body 8 consists of four touching turns that are at the top the core pin 7 are pushed. They are characterized by two warts 9a, 9b held, which protrude laterally on the core pin and between the second and the third turn fix the coil body.
- the distance between the two warts 9 from each other, seen in the longitudinal direction of the core pin, is d / 2, that is half the wire diameter d of the coil body.
- the protrusion of the warts at the core pin is about 15 ⁇ m.
- Figure 2b is a core pin 7 similar to Figure 2a, but still without a spiral body, shown. It is slightly rotated relative to the illustration in FIG. 2a. This shows that the wart 9 has a large area from a narrow one Well 10 is surrounded.
- Figure 3 shows another embodiment of an electrode, in which the Helix body 8 is held on core pin 7 only by a wart 9 becomes.
- the protrusion of the wart on the core pin is about 30 ⁇ m.
- This embodiment is especially with large diameters (preferably at least 500 ⁇ m) of the core pin makes sense.
- FIG. 4 shows a halogen incandescent lamp 15 with an output of 75 W.
- the bulb 16 is a double-coiled filament 17 through a frame 18 held in the middle.
- the double coiled ends 19a of the Luminous elements are connected to the via an uncoiled adapter 19b luminous section 19c.
- the ends are bent into a V-shape Electrodes 20, which act as internal power supplies, are pushed on and are held there by one (or two) wart (s) 21.
- the diameter of the electrode is 550 ⁇ m
- the diameter of the primary coil the filament is 200 ⁇ m.
- the protrusion of the wart 21 on the core pin is 20 ⁇ m. In the case of two warts, the protrusion is 10 ⁇ m each.
- the principle of the production of the warts is shown in FIG.
- the laser beam 26 is focused on the core pin 7 by means of a lens 27.
- a laser pulse of approx. 6 ⁇ s duration is used to generate a wart.
Landscapes
- Discharge Lamp (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
- Laser Beam Processing (AREA)
Abstract
Description
- Figur 1
- eine Hochdruckentladungslampe, im Schnitt
- Figur 2a
- eine Elektrode für die Lampe der Figur 1, im Schnitt
- Figur 2b
- den Kernstift der Elektrode in Draufsicht, aber leicht gedreht gegen die Darstellung der Figur 2a
- Figur 3
- ein weiteres Ausführungsbeispiel einer Elektrode für eine Hochdruckentladungslampe
- Figur 4
- ein Ausführungsbeispiel einer Halogenglühlampe mit einer Elektrode
- Figur 5
- eine Darstellung des Herstellverfahrens zur Schaffung von Warzen
Claims (10)
- Elektrode aus hochschmelzendem, elektrisch leitendem Material, bestehend aus einem Kernstift (7) mit aufgeschobenem Wendelkörper (8), dadurch gekennzeichnet, daß am Kernstift (7) seitlich und beabstandet von der Spitze eine über den Durchmesser des Kernstifts überstehende Warze (9) ausgebildet ist, wobei der Wendelkörper (8) mit mindestens einer Windung hinter der Warze (9) angeordnet ist.
- Elektrode nach Anspruch 1, dadurch gekennzeichnet, daß eine zweite Warze (9b) auf der der ersten Warze (9a) gegenüberliegenden Seite des Kernstifts angeordnet ist.
- Elektrode nach Anspruch 2, dadurch gekennzeichnet, daß die zweite Warze gegenüber der ersten Warze versetzt angeordnet ist.
- Elektrode nach Anspruch 3, dadurch gekennzeichnet, daß die Versetzung um einen halben Drahtdurchmesser des Wendelkörpers bzw. um eine halbe Steigung des Wendelkörpers erfolgt.
- Elektrode nach Anspruch 1, dadurch gekennzeichnet, daß der Durchmesser des Kernstifts etwa 150 bis 5000 µm beträgt.
- Elektrode nach Anspruch 1, dadurch gekennzeichnet, daß der Überstand der Warze über den Kernstift etwa 5 bis 30 µm beträgt.
- Elektrode nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß bei einer Elektrode (6) für eine Hochdruckentladungslampe (1) die Warze(n) in etwa mittig zum Wendelkörper angeordnet ist bzw. sind.
- Lampe mit einer Elektrode nach Anspruch 1.
- Verfahren zur Herstellung einer Elektrode nach Anspruch 1, dadurch gekennzeichnet, daß ein Kernstift (7) seitlich mit einem Laserstrahl (26) beschossen wird, so daß das Material des Kernstifts lokal schmilzt und eine Warze bildet, wobei anschließend der Wendelkörper über die Warze hinaus auf den Kernstift aufgeschoben wird.
- Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß ein Kernstift (7) gleichzeitig von zwei Seiten mit einem Laserstrahl (26) beschossen wird, so daß zwei Warzen gebildet werden.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19808981 | 1998-03-04 | ||
DE19808981A DE19808981A1 (de) | 1998-03-04 | 1998-03-04 | Elektrode mit Wendelaufsatz |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0940840A1 true EP0940840A1 (de) | 1999-09-08 |
EP0940840B1 EP0940840B1 (de) | 2003-11-12 |
Family
ID=7859532
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99101969A Expired - Lifetime EP0940840B1 (de) | 1998-03-04 | 1999-02-01 | Elektrode mit Wendelaufsatz |
Country Status (6)
Country | Link |
---|---|
US (1) | US6201349B1 (de) |
EP (1) | EP0940840B1 (de) |
JP (1) | JP4188480B2 (de) |
CA (1) | CA2262099A1 (de) |
DE (2) | DE19808981A1 (de) |
HU (1) | HU221944B1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19957561A1 (de) * | 1999-11-30 | 2001-05-31 | Philips Corp Intellectual Pty | Hochdruckgasentladungslampe |
EP1273379A3 (de) * | 2001-07-04 | 2006-07-12 | Fuji Photo Film Co., Ltd. | Verfahren zur Herstellung von Elektroden |
RU2006133920A (ru) * | 2004-02-23 | 2008-03-27 | Патент-Тройханд-Гезелльшафт Фюр Электрише Глюлампен Мбх (De) | Электродная система для газоразрядной лампы высокого давления |
US7489081B2 (en) * | 2004-04-01 | 2009-02-10 | Koninklijke Philips Electronics N.V. | Light burner and method for manufacturing a light burner |
JP4925317B2 (ja) * | 2007-06-21 | 2012-04-25 | ハリソン東芝ライティング株式会社 | コイル巻装電極、電極マウント及び放電ランプの製造方法 |
JP4748466B1 (ja) | 2010-04-02 | 2011-08-17 | 岩崎電気株式会社 | 放電灯用電極及びその製造方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2951966A1 (de) * | 1978-12-29 | 1980-07-03 | Gen Electric | Eektrode mit ueberwicklung fuer miniatur-dampflampe |
US5451837A (en) * | 1994-09-01 | 1995-09-19 | Osram Sylvania Inc. | Cathode for high intensity discharge lamp |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3609908A1 (de) | 1986-03-24 | 1987-10-01 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Halogengluehlampe und verfahren zu ihrer herstellung |
DE69510883T2 (de) * | 1994-05-03 | 2000-02-17 | Koninkl Philips Electronics Nv | Hochdruckentladungslampe |
-
1998
- 1998-03-04 DE DE19808981A patent/DE19808981A1/de not_active Withdrawn
-
1999
- 1999-02-01 DE DE59907671T patent/DE59907671D1/de not_active Expired - Lifetime
- 1999-02-01 EP EP99101969A patent/EP0940840B1/de not_active Expired - Lifetime
- 1999-02-08 HU HU9900267A patent/HU221944B1/hu not_active IP Right Cessation
- 1999-02-12 US US09/248,791 patent/US6201349B1/en not_active Expired - Fee Related
- 1999-02-17 CA CA002262099A patent/CA2262099A1/en not_active Abandoned
- 1999-03-04 JP JP05706499A patent/JP4188480B2/ja not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2951966A1 (de) * | 1978-12-29 | 1980-07-03 | Gen Electric | Eektrode mit ueberwicklung fuer miniatur-dampflampe |
US5451837A (en) * | 1994-09-01 | 1995-09-19 | Osram Sylvania Inc. | Cathode for high intensity discharge lamp |
Also Published As
Publication number | Publication date |
---|---|
HU9900267D0 (en) | 1999-04-28 |
CA2262099A1 (en) | 1999-09-04 |
JPH11288690A (ja) | 1999-10-19 |
DE59907671D1 (de) | 2003-12-18 |
HUP9900267A3 (en) | 2001-04-28 |
JP4188480B2 (ja) | 2008-11-26 |
HU221944B1 (hu) | 2003-02-28 |
US6201349B1 (en) | 2001-03-13 |
HUP9900267A2 (hu) | 1999-10-28 |
DE19808981A1 (de) | 1999-09-09 |
EP0940840B1 (de) | 2003-11-12 |
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