US3764842A - Arrangement for the introduction of materials in an electric discharge vessel - Google Patents

Arrangement for the introduction of materials in an electric discharge vessel Download PDF

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Publication number
US3764842A
US3764842A US00205628A US3764842DA US3764842A US 3764842 A US3764842 A US 3764842A US 00205628 A US00205628 A US 00205628A US 3764842D A US3764842D A US 3764842DA US 3764842 A US3764842 A US 3764842A
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US
United States
Prior art keywords
holder
secondary coil
vessel
capsule
arrangement
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Expired - Lifetime
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US00205628A
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English (en)
Inventor
J Ridders
A Mollet
A Termeulen
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US Philips Corp
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US Philips Corp
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Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/38—Exhausting, degassing, filling, or cleaning vessels
    • H01J9/395—Filling vessels

Definitions

  • ABSTRACT An improvement in an arrangement for the introduction of materials into a closed electric discharge vessel.
  • the arrangement includes a closed holder containing preselected material to be introduced into the vessel and a secondary coil element placed in contact with the holder which element includes a heating wire for decomposing the wall portions of the holder.
  • the heating wire is activated by the induction of current in the secondary coil by a primary coil which is external to the electric discharge vessel.
  • the invention encompasses improvement in the shape of the holder and the positioning of the holder.
  • a particular embodiment of the invention involves constricted portions of the holder which cooperate with lugs extending from a strip-shaped secondary coil section. This arrangement effects substantially improved positioning of the holder after the materials within the holder are released into the vessel.
  • the holder is a mainly cylindrical capsule and a wire-shaped heating element is provided which forms part of a secondary coil consisting of a single closed turn and placed in the vessel, in which coil a current can be generated by induction with the aid of a primary coil placed outside the vessel.
  • the part of the secondary coil which is not wire-shaped is strip-shaped .in this preferred embodiment.
  • the heating element is connected to the strip in an electrically conducting manner such that the said closed turn is produced.
  • the holder for the material(s) to be introduced is in thermal conducting contact with the wire-shaped heating element so that upon heating of this element when a current is generated in the coil said element can cut through the wall of the capsule whereby the material(s) to be introduced can be released in the discharge vessel.
  • the strip is provided with lugs encompassing the capsule in orderto keep the capsule in position.
  • the internal diameter of the capsule is generally small and is often between 0.5 and 4 mm.
  • a second drawback is that sealing of the capsule becomes more difficult so that the risk of leaky capsules is increased.
  • the glass head on the sealed ends has a less defined shape which causes difficulties when mounting the capsules on the strip-shaped part of the secondary coil.
  • a further drawback is that in some cases the hot heating element, generally a molybdenum wire, may fuse the extra wire in the capsule generally consisting of copper clad wire. Then the parts of the capsule can still come loose. All these-drawbacks may be obviated with the aid of a construction according to the present invention.
  • An electric discharge vessel manufactured by a method according to the Netherlands Patent Application 6909890 which method starts from a vessel in which a closed holder is placed which is provided with a quantity of one or more materials to be introduced into the vessel and in which subsequently a desired gas atmosphere is brought about whereafter the vessel is closed and in which finally the holder is opened by the passage of current through a heating element present in the vessel is characterized according to the improvement in that the heating element is wire-shaped and forms part of a secondary coil consisting of a closed turn and placed in the vessel, in which coil a current can be generated by induction with the aid of a primary coil placed outside the vessel, the holder being mainly a cylindrical capsule and the part of the secondary coil not consisting of the heating wire being strip-shaped and having at least two lugs which engage constricted parts of the capsule.
  • FIG. 1 shows the stem with the electron system for a low-pressure mercury vapour discharge lamp according to the main application
  • FIG. 2 shows a stem for a low-pressure mercury vapour discharge lamp according to the improvement
  • FIG. 3 shows a further embodiment of a stem for a low-pressure mercury vapour discharge lamp according to the improvement.
  • a secondary coil is mounted on a pinch l, which coil consists of a strip-shaped part 2 and a heating wire 3.
  • Strip 2 is secured to the pinch with the aid of a supporting terminal 4.
  • the reference numeral 5 denotes a cathode shown diagrammatically.
  • Two lugs 6 and 7 are depressed in the strip 2 so that they can encompass a capsule 8 which contains a quantity of mercury 11 to be introduced into the'discharge vessel. This capsule is slid under the lugs 6 and 7 during manufacture.
  • the heating wire 3 then engages the wall of the capsule 8. To open the capsule an induction current is generated in the coil consisting of the heating wire 3 and the strip 2, which induction current has such a value that the wire 3 is brought to incandescence.
  • This wire 3 then cuts through the capsule 8. If the capsule is cut through completely, or breaks into two parts the lower and upper parts of the capsule vmayget loose from the lugs 6 and 7 and come in the discharge vessel. This drawback is obviated in a construction according to the improvement as is shown in FIG. 2.
  • the capsule 8 is provided with constricted parts 9 and 10 at the area of the lugs 6 and 7, respectively. It is evident that even when the heating wire 3 cuts through the capsule the two parts of the capsule cannot get loose from the lugs 6 and 7.
  • FIG. 3 shows a further embodiment of a discharge vessel according to the improvement. Also in this Figure the same reference numerals have been used for corresponding parts of the construction.
  • the lugs are constituted by the parts of the edges at one end of the stripshaped part 2 of the secondary coil. As compared with the construction of FIG. 2 this provides the advantage that it is easier to make the lugs 6 and 7 and to mount the capsule on the strip 2. In fact, the lugs 6 and 7 can then be bent about the constricted parts of the capsule. This is easier than sliding the capsule as would be necessary in the construction according to FIG. 2.
  • the lugs must sometimes be pressed after the capsule has been placed on the strip 2. It is not necessary for the lugs 6 7 to be formed from the sides of the strip 2; they may alternatively be formed from the intermediate part of the relevant end of the strip 2.
  • constricted parts of the capsule may have the shape of a ridge as is shown in FIGS. 2 and 3, but this is not necessaryv Differently shaped constrictions may lead to the object of the invention, namely to prevent parts of the capsule from getting loose from the strip and coming in the discharge vessel.
  • a closed lamp vessel wherein a closed holder containing preselected materials to be introduced into said vessel is mounted, the holder being in pressable contact with a wire-shaped heating element forming a part of a secondary coil consisting of a single turn, said heating element adapted to being heated by current flow in the secondary coil induced by a primary coil external to the vessel, the improvement comprising that the holder is substantially cylindrical in shape and having at least two portions of the holder of substantially narrower diameter than the remainder of the capsule, part of the secondary coil excluding the heating wire being stripshaped and having at least two lugs which engage the narrow diameter portions of the holder, whereby upon induction of current in said secondary coil, said heating wire decomposes the walls of the holder to release said materials, the separated sections of the holder being held in place by the lugs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • General Induction Heating (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
US00205628A 1970-12-25 1971-12-07 Arrangement for the introduction of materials in an electric discharge vessel Expired - Lifetime US3764842A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7018831.A NL162244C (nl) 1970-12-25 1970-12-25 Lagedrukkwikdampontladingslamp.

Publications (1)

Publication Number Publication Date
US3764842A true US3764842A (en) 1973-10-09

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ID=19811890

Family Applications (1)

Application Number Title Priority Date Filing Date
US00205628A Expired - Lifetime US3764842A (en) 1970-12-25 1971-12-07 Arrangement for the introduction of materials in an electric discharge vessel

Country Status (13)

Country Link
US (1) US3764842A (enrdf_load_stackoverflow)
JP (1) JPS5332195B1 (enrdf_load_stackoverflow)
AU (1) AU473539B2 (enrdf_load_stackoverflow)
BE (1) BE777234R (enrdf_load_stackoverflow)
BR (1) BR7108505D0 (enrdf_load_stackoverflow)
CA (1) CA934427A (enrdf_load_stackoverflow)
DE (1) DE2161024C3 (enrdf_load_stackoverflow)
DK (1) DK128086B (enrdf_load_stackoverflow)
ES (1) ES192470Y (enrdf_load_stackoverflow)
FR (1) FR2119693A6 (enrdf_load_stackoverflow)
GB (1) GB1371067A (enrdf_load_stackoverflow)
IT (1) IT968042B (enrdf_load_stackoverflow)
NL (1) NL162244C (enrdf_load_stackoverflow)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4056750A (en) * 1976-12-17 1977-11-01 Gte Sylvania Incorporated Mercury dispenser for discharge lamps
EP0004750A3 (en) * 1978-03-31 1979-10-31 Thorn Emi Limited Heating of dosing capsule
US4182971A (en) * 1978-07-10 1980-01-08 Gte Sylvania Incorporated Mercury-containing glass-capsule dispenser for discharge lamps
DE2943813A1 (de) * 1978-11-02 1980-05-14 Gte Sylvania Inc Bogenentladungslampe
FR2469799A1 (fr) * 1979-11-07 1981-05-22 Gte Prod Corp Distributeur de mercure pour lampes a decharge
US4427919A (en) 1980-07-30 1984-01-24 Grenfell Julian P Mercury holder for electric discharge lamps
US4542319A (en) * 1980-10-22 1985-09-17 Sale Tilney Technology Plc Mercury dispenser for electric discharge lamps
US4754193A (en) * 1985-11-08 1988-06-28 Gte Products Corporation Mercury dispenser for arc discharge lamps
US5006755A (en) * 1989-03-07 1991-04-09 Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen M.B.H. Mercury discharge lamp with mercury containing capsule
US5394056A (en) * 1993-04-07 1995-02-28 General Electric Company Opening of capsule inside sealed lamp
US6680571B1 (en) 1997-05-22 2004-01-20 Saes Getters S.P.A. Device for introducing small amounts of mercury into fluorescent lamps
US20070216282A1 (en) * 2006-03-16 2007-09-20 Kiermaier Ludwig P Lamp electrode and method for delivering mercury
US20070216308A1 (en) * 2006-03-16 2007-09-20 Kiermaier Ludwig P Lamp electrode and method for delivering mercury
US20090022892A1 (en) * 2004-12-27 2009-01-22 Saes Getters S.P.A. Process for manufacturing devices carrying at least one active material by deposition of a low-melting alloy
US20090255929A1 (en) * 2003-11-10 2009-10-15 Inoflate, Llc Method and device for pressurizing containers
US20110074278A1 (en) * 2008-06-25 2011-03-31 Alessio Corazza Hot cathode fluorescent lamp containing a device for mercury release and a getter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5715172U (enrdf_load_stackoverflow) * 1980-06-30 1982-01-26

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1092716A (en) * 1913-07-09 1914-04-07 Marcus C Hurd Sterilizing-case.
US1768421A (en) * 1927-12-14 1930-06-24 Gen Electric Electron-discharge device
US2188186A (en) * 1939-01-20 1940-01-23 Gen Electric Discharge device
DE1130086B (de) * 1959-10-03 1962-05-24 Jenoptik Jena Gmbh Verfahren zum Gettern von mit Photokathode ausgestatteten Elektronenroehren

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1092716A (en) * 1913-07-09 1914-04-07 Marcus C Hurd Sterilizing-case.
US1768421A (en) * 1927-12-14 1930-06-24 Gen Electric Electron-discharge device
US2188186A (en) * 1939-01-20 1940-01-23 Gen Electric Discharge device
DE1130086B (de) * 1959-10-03 1962-05-24 Jenoptik Jena Gmbh Verfahren zum Gettern von mit Photokathode ausgestatteten Elektronenroehren

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4056750A (en) * 1976-12-17 1977-11-01 Gte Sylvania Incorporated Mercury dispenser for discharge lamps
EP0004750A3 (en) * 1978-03-31 1979-10-31 Thorn Emi Limited Heating of dosing capsule
US4278908A (en) * 1978-03-31 1981-07-14 Thorn Electrical Industries Limited Heating of dosing capsule
US4182971A (en) * 1978-07-10 1980-01-08 Gte Sylvania Incorporated Mercury-containing glass-capsule dispenser for discharge lamps
DE2943813A1 (de) * 1978-11-02 1980-05-14 Gte Sylvania Inc Bogenentladungslampe
US4383197A (en) * 1978-11-02 1983-05-10 Gte Products Corporation Metal halide arc discharge lamp having shielded electrode
FR2469799A1 (fr) * 1979-11-07 1981-05-22 Gte Prod Corp Distributeur de mercure pour lampes a decharge
US4427919A (en) 1980-07-30 1984-01-24 Grenfell Julian P Mercury holder for electric discharge lamps
US4542319A (en) * 1980-10-22 1985-09-17 Sale Tilney Technology Plc Mercury dispenser for electric discharge lamps
US4754193A (en) * 1985-11-08 1988-06-28 Gte Products Corporation Mercury dispenser for arc discharge lamps
US5006755A (en) * 1989-03-07 1991-04-09 Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen M.B.H. Mercury discharge lamp with mercury containing capsule
US5394056A (en) * 1993-04-07 1995-02-28 General Electric Company Opening of capsule inside sealed lamp
US6680571B1 (en) 1997-05-22 2004-01-20 Saes Getters S.P.A. Device for introducing small amounts of mercury into fluorescent lamps
US20090255929A1 (en) * 2003-11-10 2009-10-15 Inoflate, Llc Method and device for pressurizing containers
US20090022892A1 (en) * 2004-12-27 2009-01-22 Saes Getters S.P.A. Process for manufacturing devices carrying at least one active material by deposition of a low-melting alloy
US8071172B2 (en) 2004-12-27 2011-12-06 Saes Getters S.P.A. Process for manufacturing devices carrying at least one active material by deposition of a low-melting alloy
US20070216282A1 (en) * 2006-03-16 2007-09-20 Kiermaier Ludwig P Lamp electrode and method for delivering mercury
US20070216308A1 (en) * 2006-03-16 2007-09-20 Kiermaier Ludwig P Lamp electrode and method for delivering mercury
US7288882B1 (en) 2006-03-16 2007-10-30 E.G.L. Company Inc. Lamp electrode and method for delivering mercury
US20110074278A1 (en) * 2008-06-25 2011-03-31 Alessio Corazza Hot cathode fluorescent lamp containing a device for mercury release and a getter
US8598773B2 (en) * 2008-06-25 2013-12-03 Saes Getters S.P.A. Hot cathode fluorescent lamp containing a device for mercury release and a getter

Also Published As

Publication number Publication date
NL7018831A (enrdf_load_stackoverflow) 1972-06-27
ES192470Y (es) 1975-01-01
IT968042B (it) 1974-03-20
NL162244C (nl) 1980-04-15
DE2161024C3 (de) 1978-06-29
BR7108505D0 (pt) 1973-07-03
JPS5332195B1 (enrdf_load_stackoverflow) 1978-09-07
BE777234R (fr) 1972-04-17
GB1371067A (en) 1974-10-23
FR2119693A6 (enrdf_load_stackoverflow) 1972-08-04
AU473539B2 (en) 1973-06-28
DK128086B (da) 1974-02-25
DE2161024B2 (de) 1977-10-27
AU3725871A (en) 1973-06-28
CA934427A (en) 1973-09-25
NL162244B (nl) 1979-11-15
DE2161024A1 (de) 1972-07-13
ES192470U (es) 1974-09-01

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