US3515931A - Pinch seal portion of discharge lamps or the like - Google Patents

Pinch seal portion of discharge lamps or the like Download PDF

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Publication number
US3515931A
US3515931A US781500A US3515931DA US3515931A US 3515931 A US3515931 A US 3515931A US 781500 A US781500 A US 781500A US 3515931D A US3515931D A US 3515931DA US 3515931 A US3515931 A US 3515931A
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US
United States
Prior art keywords
seal portion
pinch
pinch seal
shaped
discharge lamps
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 - Lifetime
Application number
US781500A
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English (en)
Inventor
Shohei Takakuwa
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.)
Ushio Denki KK
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Ushio Denki KK
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Filing date
Publication date
Application filed by Ushio Denki KK filed Critical Ushio Denki KK
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/32—Seals for leading-in conductors
    • H01J5/38—Pinched-stem or analogous seals
    • 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
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/32—Sealing leading-in conductors
    • H01J9/323—Sealing leading-in conductors into a discharge lamp or a gas-filled discharge device
    • H01J9/326—Sealing leading-in conductors into a discharge lamp or a gas-filled discharge device making pinched-stem or analogous seals

Definitions

  • Said seal portions have a Z-shape or ]-shape in section.
  • the present invention relates to a structure of a pinch seal portion of discharge lamps of the double end sealed type or single end sealed type or halogen incandescent lamps.
  • An object of this invention is to provide 'a pinch seal portion of a discharge lamp or the like which is Z-shaped in section.
  • Another object of the invention is to provide a pinch seal portion of a discharge lamp or the like which is 1-shaped in section.
  • Still another object of the invention is to provide a pinch seal portion which is free from the occurrence of I-shaped cracks which cross each other in the shape of a letter T at the upper and lower end in the interior of the seal portion.
  • FIG. 1 is a view in explanation of an incandescent lamp of the prior art
  • FIGS. 2(a), 2(b) and 2(c) are views in explanation of pinch seal portions of incandescent lamps or discharge lamps of the prior art
  • FIG. 3 is a view in explanation of a pinch mold for forming a conventional I-shaped pinch seal portion
  • FIG. 4 is a view in explanation of the manner in which pressure is applied during the process of forming a conventional I-shaped pinch seal portion
  • FIGS. 5 and 6 are views in explanation of pinch seal portions embodying the present invention.
  • FIG. 7 is a view in explanation of a pinch mold for forming a pinch seal portion of Z-shaped section according to this invention.
  • FIG. 8 is a view in explanation of the manner in which pressure is applied during the process of forming a pinch seal portion of Z-shaped section according to this invention.
  • FIG. 1 shows an incandescent lamp which includes an envelope of quartz 1, a filament 2, supporter members 3 for said filament 2, pinch seal portions 4 and 4' disposed at opposite ends of said envelope of quartz 1, lead-in conductors 5 and 5' sealed in said pinch seal portions 4 and 4' respectively and connected to opposite ends of said filament 2, lead wires 6 and 6' connected to said lead-in conductors 5 and 5' respectively, and terminals 7 and 7' connected to said lead wires 6 and 6' respectively.
  • the pinch seal portions 4 and 4' of conventional halogen incandescent lamps and discharge lamps have hitherto been formed such that they are rectangular, circular or -I-shaped in section as shown in FIGS. 2(a), 2(b) and 2(0).
  • the pinch seal portions having a rectangular section or a'circular section have been partly formed by manual operation and a combination of manual opera tion with mechanical sealing, but the pinch seal portions with an I-shaped section have nearly all been formed by mechanical sealing.
  • the pinch seal portion 4 and 4' of I-shaped section which relyon mechanical sealing are formed by using an I-shaped pinch mold which is formed with recessed dead end portions Q on the portions of the pressure applying inner surfaces of the mold which correspond to 0pposite ends of upper and lower horizontal lines of the ,1 letter I as shown in FIG. 3.
  • an I-shaped pinch mold which is formed with recessed dead end portions Q on the portions of the pressure applying inner surfaces of the mold which correspond to 0pposite ends of upper and lower horizontal lines of the ,1 letter I as shown in FIG. 3.
  • the invention provides a pinch seal portion which is Z-shaped or ]-shaped in section as shown in FIGS. 5 and 6.
  • FIG. 7 shows a pinch mold for producing a pinch seal portion of Z-shaped section according to this invention.
  • the pinch seal portion of discharge lamps or the like has a structure as aforementioned, so that a pinch mold for forming same has no dead end portions Q on the pressure applying inner surfaces thereof as are the case with conventional I-shaped pinch molds.
  • a seal portion is formed by using this mold, stresses applied to opposite ends of the seal portion are directed outwardly as indicated by the arrows c and c as shown in FIG. 8, so that no four direction pressing occurs and no intersections P are formed.
  • the pinch mold used may be essentially dimensioned such that excess material for forming a seal portion can be released to outside. This permits to achieve a high yield in the sealing operation even if Quartz Envelope (1n./m.)
  • An electric lamp comprising a sealed envelope of quartz containing a filament and having external pinch seal portions at opposite ends of the envelope and lead-in conductors extending through the external pinch seal portions from said filament, said seal portions have a Z-shape in section.
  • An electric'lamp comprising a sealed envelope of quartz containing a filament having external pinch seal portions at opposite ends'of the envelope and lead-in conductors extending throu h the external pinch seal portions from said filament, said seal portions have a ]-shape in section.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
US781500A 1968-11-06 1968-12-05 Pinch seal portion of discharge lamps or the like Expired - Lifetime US3515931A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8061568A JPS4911820B1 (enrdf_load_stackoverflow) 1968-11-06 1968-11-06

Publications (1)

Publication Number Publication Date
US3515931A true US3515931A (en) 1970-06-02

Family

ID=13723231

Family Applications (1)

Application Number Title Priority Date Filing Date
US781500A Expired - Lifetime US3515931A (en) 1968-11-06 1968-12-05 Pinch seal portion of discharge lamps or the like

Country Status (2)

Country Link
US (1) US3515931A (enrdf_load_stackoverflow)
JP (1) JPS4911820B1 (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3763390A (en) * 1968-09-19 1973-10-02 Shapiro N Miniature incandescent lamp and apparatus and method for making the same
US4195249A (en) * 1978-08-30 1980-03-25 Stanley Electric Co., Ltd. Flat type of fluorescent lamp
US4918582A (en) * 1987-12-16 1990-04-17 F.L. Industries, Inc. Mating terminal and socket assembly
US5430353A (en) * 1993-07-22 1995-07-04 General Electric Company Lamp inlead assembly having a formed foil arrangement
US5528106A (en) * 1993-08-18 1996-06-18 U.S. Philips Corporation Electric lamp with H-shaped pinched seal
US5686783A (en) * 1995-07-04 1997-11-11 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh Cementless electrical lamp-base combination
EP1067581A3 (en) * 1999-07-05 2003-06-25 Ushiodenki Kabushiki Kaisha Discharge lamp
EP1328006A1 (en) * 2002-01-11 2003-07-16 General Electric Company Electrode assembly and lamp with conductor foil
US20060061283A1 (en) * 2004-09-21 2006-03-23 Patent-Treuhand-Gesellschaft Fur Elektrisch Gluhla Electric lamp that is closed by means of a foil seal
US20180231795A1 (en) * 2015-11-16 2018-08-16 Axis Ab Lens arrangement and a monitoring camera comprising the lens arrangement

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63100581U (enrdf_load_stackoverflow) * 1986-12-17 1988-06-30

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438993A (en) * 1943-01-08 1948-04-06 Hartford Nat Bank & Trust Co Flashlight lamp

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438993A (en) * 1943-01-08 1948-04-06 Hartford Nat Bank & Trust Co Flashlight lamp

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3763390A (en) * 1968-09-19 1973-10-02 Shapiro N Miniature incandescent lamp and apparatus and method for making the same
US4195249A (en) * 1978-08-30 1980-03-25 Stanley Electric Co., Ltd. Flat type of fluorescent lamp
US4918582A (en) * 1987-12-16 1990-04-17 F.L. Industries, Inc. Mating terminal and socket assembly
US5430353A (en) * 1993-07-22 1995-07-04 General Electric Company Lamp inlead assembly having a formed foil arrangement
US5528106A (en) * 1993-08-18 1996-06-18 U.S. Philips Corporation Electric lamp with H-shaped pinched seal
US5686783A (en) * 1995-07-04 1997-11-11 Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh Cementless electrical lamp-base combination
EP1067581A3 (en) * 1999-07-05 2003-06-25 Ushiodenki Kabushiki Kaisha Discharge lamp
EP1328006A1 (en) * 2002-01-11 2003-07-16 General Electric Company Electrode assembly and lamp with conductor foil
US6661172B2 (en) 2002-01-11 2003-12-09 General Electric Company Electrode assembly and lamp with conductor foil
US20060061283A1 (en) * 2004-09-21 2006-03-23 Patent-Treuhand-Gesellschaft Fur Elektrisch Gluhla Electric lamp that is closed by means of a foil seal
US20180231795A1 (en) * 2015-11-16 2018-08-16 Axis Ab Lens arrangement and a monitoring camera comprising the lens arrangement
US10310291B2 (en) 2015-11-16 2019-06-04 Axis Ab Lens arrangement and a monitoring camera comprising the lens arrangement

Also Published As

Publication number Publication date
JPS4911820B1 (enrdf_load_stackoverflow) 1974-03-19

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