[go: up one dir, main page]

US2914371A - Method of making miniature lamps - Google Patents

Method of making miniature lamps Download PDF

Info

Publication number
US2914371A
US2914371A US589783A US58978356A US2914371A US 2914371 A US2914371 A US 2914371A US 589783 A US589783 A US 589783A US 58978356 A US58978356 A US 58978356A US 2914371 A US2914371 A US 2914371A
Authority
US
United States
Prior art keywords
bulb
exhaust tube
exhaust
lamps
tube
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
US589783A
Other languages
English (en)
Inventor
Wiedenmann Hans
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
Application granted granted Critical
Publication of US2914371A publication Critical patent/US2914371A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H01K3/26—Closing of vessels
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H01K3/20—Sealing-in wires directly into the envelope
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H01K3/22—Exhausting, degassing, filling, or cleaning vessels

Definitions

  • the present invention relates to the manufacture of vacuum devices and relates more particularly to the method of exhausting and/or gas filling miniature or what may be termed subminiature incandescent or discharge lamps and the article produced thereby.
  • the present invention provides an improved and practical method of manufacturing electric incandescent or glow discharge lamps of the small size or miniature type.
  • the evacuation of small size lamps in accordance with the present method employs a metallic exhaust tube, which with filament supporting leading-in wires, is first sealed in a pinched or compressed glass portion of the bulb neck.
  • the lamp is then exhausted and, if desired, gas filled; the compressed glass or press about the exhaust tube is then reheated, and during the heating to soften "the press, the exhaust tube is withdrawn.
  • the softened glass is compressed to close the passage and hermetically seal the bulb.
  • Another object is to provide a method wherein a bulb is exhausted through an exhaust tube and the tube removed from the bulb.
  • Another object of the invention is to provide a method of exhausting a bulb by means or" an exhaust tube and in sealing the bulb during the removal of the tube.
  • Another object of the invention is to provide a method whereby a miniature lamp may be exhausted and hermetically sealed to provide a lamp bulb having a solid end wall or press of reduced proportions.
  • Fig. 1 shows a cross sectional view of a lamp bulb and a vacuum bulb gripping member, the bulb being held above a lamp mount supported by gripping tongs, the mount being in position to be enclosed by the bulb;
  • Fig. 2 is a fragmentary top view of the mount support or gripping tongs
  • Fig. 3 is a view of the parts shown in Fig. 1, with the bulb moved to enclose the mount and showing an exhaust tube disposed in the bulb neck with a pair of burners which serve as clamping jaws in position to heat the bulb neck;
  • Fig. 4 is a View similar to Fig. 3 with the jaws in clamping position;
  • Fig. 5 is a view similar to Fig. 4 showing the jaws retracted and burners operating to heat the bulb neck after an exhaust operation;
  • FIG. 6 is a view similar to Fig. 5 showing the exhaust tube removed and the jaws in clamping relation to the bulb neck;
  • Pig. 7 shows an exhausted bulb ready to be based
  • Fig. 8 is a view of a modification wherein additional burners are provided to direct flames below the bulb neck and the middle blade of the tongs being reduced in thickness and also shows in cross section the exhaust tube connected to the nozzle of a pump; and
  • Fig. 9 is a sectional view showing a double-way exhaust tube.
  • the apparatus for practicing the method is shown as applied to perform a sealing-in and exhaust operation in connection with what are herein termed submim'ature incandescent lamps. Lamps of these diminutive sizes find use in toys, various forms of surgical and scientific instruments, as well as certain limited industrial applications.
  • FIG. 1 illustrate apparatus for practicing the method as applied to a lamp of the subminiature type which includes a glass bulb 9 to enclose a coil filament 19 connected to leading-in wires or conductors 11.
  • the leading-in wires are held by what is herein termed a holding tongs 12.
  • the holding tongs or gripping memher as shown schematically in Fig. 2, consists of a fixed section or finger 13 intermediate movable jaw members or fingers 14 and 15 which are movable relative to section 13 by any suitable means as, for example, about pivots (not shown).
  • the leading-in wires 11 are secured between jaws l4 and 15 and the intermediate section 13 to support the filament 10 in position to be enclosed by glass bulb 9.
  • the leading-in wires and connected filament are pre-formed in accordance with common prac-v tice and may be considered as the mount element of the lamp.
  • the section 13 of the tongs 12 is provided with an aperture 16 to receive a metallic exhaust tube 17 one end 3 of which, when inserted through the aperture 16, will be disposed centrally between the leads 11.
  • a vacuum gripper member 19 of any suitable type known to the industry is employed to grip the bulb and position the neck portion 20 in axial alignment with the aperture and with the edge of the neck portion of the bulb in contact with the upper surface of the tongs 12.
  • the exhaust tube 17 is held by suitable means (not shown) adjacent to the opposite surface of the tongs.
  • the bulb is moved by means of the gripper member 19 and the bulb neck portion being in contact with the tongs, the tongs are moved downwardly as indicated by arrow X, Fig. 1, until the end portion of the exhaust tube is disposed in the bulb neck as shown in Fig. 3.
  • the bulb neck and the exhaust tube are positioned as shown, the bulb neck is heated to soften the glass which is then compressed about the exhaust tube and the leading-in wires.
  • This compressing operation is accomplished by providing a pair of clamping or presser jaws 21 and 22 actuated by any suitable means (not shown).
  • any suitable means not shown.
  • the jaws are initially positioned in spaced relation to the bulb neck as shown in Fig. 3, and the burners are operated to heat the bulb neck to soften the glass to a predetermined degree. The flames are then extinguished and the jaws are moved to compress the glass about the exhaust tube and leading-in wires as shown in Fig. 4.
  • the lamp is then exhausted in the usual manner as well known in the art and, if desired, may be gas filled.
  • the jaws are moved from contact with the press as shown in Fig. 5, and the burners are operated to again heat the neck or press of the bulb.
  • the tongs are moved to slowly lift the bulb relative to the exhaust tube, thereby withdrawing the exhaust tube. It has been found practical to especially direct the burner flames toward the exhaust tube, so as to heat said exhaust tube more intensely than the surrounding glass.
  • the exhaust tube will then impart its heat to the glass and is easily withdrawn.
  • the clamping jaws are moved to compress the glass and hermetically close the exhaust passage to form a solid body of glass about the leadingin wires as shown in Fig. 6.
  • the lamp may then be lifted from the holding tongs by means of the vacuum gripper.
  • the contact pins may be initially connected to the leads and embedded in the press or end wall during the clamping or pinching by the jaws.
  • Fig. 8 shows a modification wherein a pair of additional burners 26 and 27 are provided to supply added heat to the metal exhaust tube and fixed blade 28 which may be of thin refractory material so as to reduce the heat transfer rate to the press of the bulb 30.
  • the exhaust tube is shown with an end disposed in a generally cone shaped member 31 in nozzle 32 of an exhaust machine, the cone shaped member being secured by screw cap 33.
  • the attachment for the exhaust as shown including nozzle 32 may be employed to connect the exhaust tube to an exhaust machine when practicing the present method or the connection between the exhaust tube and the exhaust machine may be varied to meet conditions.
  • an extremely small diameter and thin walled metallic exhaust tube may be employed. It has been found practical to use a tube having an outside diameter of about 2 mm. or less and a wall thickness of about 0.5 mm.; thereby making practical the commercial manufacture of extremely small size lamps as, for example, lamps having a maximum bulb diameter of about 5 mm. or less.
  • the dimensions of the exhaust tube will in each case be determined by the dimensions of the lamp. It has been found preferable to make the exhaust tube of copper or heat resistant steel for the average size small lamps. In the manufacture of lamps of the smallest dimensions, the exhaust tube may be coated with glass, enamel, or borax, which have a lower melting point than the glass of the lamp, thus making the exhaust tube more easily removable at the second heating. If a suitable non-scaling material is used for the exhaust tube, it may be used repeatedly as desired.
  • a double-way exhaust tube may be used, i.e. a tube as shown in Fig. 9 which is divided into two channels 34, 35 by a partition wall 36.
  • the gas is blown through one of the channels 34 into the bulb, while the air and the surplus of the gas is able to escape through the second channel 35.
  • flash light lamps containing a combustible material may be filled with oxygen without the necessity of a previous evacuation.
  • the method of making miniature lamps filled with gas which comprises supporting a glass lamp bulb with a neck portion surrounding a leading-in conductor and a double-way exhaust tube providing two channels therein, heating to soften that neck portion, compressing the heated glass to seal the exhaust tube and conductor in an end wall of the bulb, blowing gas through one channel of the exhaust tube into the bulb, thereby driving out the air and the surplus of the gas through the other channel of the exhaust tube, heating said end wall of the bulb and exhaust tube again to soften said end wall, withdrawing said exhaust tube and compressing the softened end wall during the withdrawal of said tube, thereby removing the exhaust tube and its channels and hermetically sealing said lamp bulb.
  • the method of making miniature lamps which comprises supporting a glass lamp bulb with the neck portion surrounding a temporary exhaust tube providing an exhaust passage, heating to soften said neck portion, compressing the heated glass to temporarily seal the exhaust tube in a compressed glass body portion of the bulb to provide a temporary exhaust passage from the bulb by the exhaust passage of said exhaust tube, exhausting the bulb through said exhaust passage, heating to soften said glass body, withdrawing said exhaust tube in its entirety and compressing the softened body during the withdrawal of said tube, thereby removing the exhaust tube and its passage and hermetically sealing said lamp bulb.
  • the method of making miniature lamps which comprises supporting a glass lamp bulb with the neck portion surrounding a leading-in conductor and a temporary exhaust tube providing an exhaust passage, heating to soften said neck portion, compressing the heated glass to permanently seal said conductor in an end wall of the bulb and temporarily seal the exhaust tube in said wall to provide an exhaust passage from the bulb by the exhaust passage of said exhaust tube, exhausting the bulb through said exhaust passage, heating to soften said end wall, withdrawing said exhaust tube in its entirety and compressing the softened end wall during the withdrawal of said tube, thereby removing the exhaust tube and its passage and hermetically sealing said lamp bulb.
  • the method of making miniature lamps which comprises supporting a glass lamp bulb with the neck portion surrounding filament supporting leading-in wires, positioning one end of a temporary metallic exhaust tube within said neck portion thereby providing an exhaust passage through said tube from within said bulb to the exterior thereof, applying a source of heat to soften said neck portion, removing said heat source, compressing the softened neck portion about said metallic exhaust tube and leading-in wires, exhausting said bulb through the passage of said metallic exhaust tube, applying a source of heat to soften said compressed neck portion, withdrawing the metallic exhaust tube and applying pressure to said softened compressed neck portion during the withdrawal of said tube to hermetically seal said lamp.
  • the method of making miniature lamps which comprises supporting a glass lamp bulb having a maximum outside bulb diameter of about 5 mm. and positioned with the neck portion surrounding a temporary metallic exhaust tube having an outside diameter of about 2 mm. and a wall thickness of about 0.5 mm., heating to soften said neck portion, compressing the heated glass to temporarily seal the exhaust tube in a solid end wall formed from said neck portion of the bulb, exhausting the bulb through the metallic exhaust tube, heating to soften said end wall, withdrawing the metallic exhaust tube and compressing the softened end wall during the withdrawal of said tube to hermetically seal said lamp bulb.
  • the method of making miniature lamps which comprises supporting a glass lamp bulb having a maximum 6 outside bulb diameter of about 5 mm. and positioned with the neck portion surrounding filament supporting leading-in wires extending from said neck portion, disposing one end of an exhaust tubehaving an outside diameter of about 2 and a wall thickness of about 9.5 mm. within said neck portion, applying a source of heat to soften said neck portion, removing said heat source, compressing the softened neck portion about said exhaust tube and leading-in wires, exhausting said bulb through said exhaust tube, applying a source of heat to soften said compressed neck portion, withdrawing the exhaust tube in its entirety, and applying pressure to said softened compressed neck portion during the withdrawal of said tube to hermetically seal said lamp bulb.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Resistance Heating (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
US589783A 1955-06-16 1956-06-06 Method of making miniature lamps Expired - Lifetime US2914371A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE346613X 1955-06-16

Publications (1)

Publication Number Publication Date
US2914371A true US2914371A (en) 1959-11-24

Family

ID=6255350

Family Applications (1)

Application Number Title Priority Date Filing Date
US589783A Expired - Lifetime US2914371A (en) 1955-06-16 1956-06-06 Method of making miniature lamps

Country Status (6)

Country Link
US (1) US2914371A (fr)
BE (1) BE548671A (fr)
CH (1) CH346613A (fr)
FR (1) FR1159606A (fr)
GB (1) GB834424A (fr)
NL (2) NL208036A (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3069583A (en) * 1959-10-30 1962-12-18 Sylvania Electric Prod Electric lamp
US3073137A (en) * 1960-02-01 1963-01-15 Westinghouse Electric Corp Press sealing process and apparatus
US3230028A (en) * 1962-01-29 1966-01-18 Philip J Kayatt Method of making miniature gas discharge tubes
US3252781A (en) * 1961-05-01 1966-05-24 Gen Electric Apparatus for panel lamp manufacture
US3265923A (en) * 1963-03-19 1966-08-09 Westinghouse Electric Corp Baseless double-ended electric incandescent lamp
US3270237A (en) * 1963-06-26 1966-08-30 Gen Electric Electric lamp with single ended pinch seal
US3290906A (en) * 1963-07-16 1966-12-13 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Miniature lamp
US3321662A (en) * 1962-07-02 1967-05-23 Sylvania Electric Prod Electric lamp with tubular body and light transmitting closure having over-lapping flange seal
US3413054A (en) * 1966-12-30 1968-11-26 Sylvania Electric Prod Method of fabricating an incandescent lamp and its construction
US3685881A (en) * 1969-08-06 1972-08-22 Jean Rochet Methods of making incandescent lamps
US20050275349A1 (en) * 2004-06-09 2005-12-15 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh Method and apparatus for producing a lamp
CN103449710A (zh) * 2013-08-23 2013-12-18 武汉鑫友泰光电科技有限公司 厚壁石英玻璃管侧面自动接排气咀的装置及方法
CN103700573A (zh) * 2013-12-31 2014-04-02 詹云翔 一种灯泡封口机的烧结装置
CN103715062A (zh) * 2013-12-31 2014-04-09 詹云翔 一种灯泡封口设备

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60185357A (ja) * 1984-03-05 1985-09-20 スタンレー電気株式会社 ビード封止ガス入り電球の製造装置
CN113977962B (zh) * 2021-10-23 2022-08-23 江西阳硕塑业科技有限公司 一种灯泡生产用定型装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US709996A (en) * 1900-05-14 1902-09-30 Western Electric Co Signal-lamp for telephone-switchboards.
US2116384A (en) * 1937-03-02 1938-05-03 Gen Electric Electric lamp or similar device
US2477372A (en) * 1945-01-24 1949-07-26 Herzog Carl Electric gaseous discharge lamp
US2556059A (en) * 1949-06-21 1951-06-05 Tung Sol Lamp Works Inc Electric incandescent lamp and method of manufacturing
US2794699A (en) * 1952-12-13 1957-06-04 Westinghouse Electric Corp Manufacture of small lamps

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US709996A (en) * 1900-05-14 1902-09-30 Western Electric Co Signal-lamp for telephone-switchboards.
US2116384A (en) * 1937-03-02 1938-05-03 Gen Electric Electric lamp or similar device
US2477372A (en) * 1945-01-24 1949-07-26 Herzog Carl Electric gaseous discharge lamp
US2556059A (en) * 1949-06-21 1951-06-05 Tung Sol Lamp Works Inc Electric incandescent lamp and method of manufacturing
US2794699A (en) * 1952-12-13 1957-06-04 Westinghouse Electric Corp Manufacture of small lamps

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3069583A (en) * 1959-10-30 1962-12-18 Sylvania Electric Prod Electric lamp
US3073137A (en) * 1960-02-01 1963-01-15 Westinghouse Electric Corp Press sealing process and apparatus
US3252781A (en) * 1961-05-01 1966-05-24 Gen Electric Apparatus for panel lamp manufacture
US3230028A (en) * 1962-01-29 1966-01-18 Philip J Kayatt Method of making miniature gas discharge tubes
US3321662A (en) * 1962-07-02 1967-05-23 Sylvania Electric Prod Electric lamp with tubular body and light transmitting closure having over-lapping flange seal
US3265923A (en) * 1963-03-19 1966-08-09 Westinghouse Electric Corp Baseless double-ended electric incandescent lamp
US3270237A (en) * 1963-06-26 1966-08-30 Gen Electric Electric lamp with single ended pinch seal
US3290906A (en) * 1963-07-16 1966-12-13 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Miniature lamp
US3413054A (en) * 1966-12-30 1968-11-26 Sylvania Electric Prod Method of fabricating an incandescent lamp and its construction
US3685881A (en) * 1969-08-06 1972-08-22 Jean Rochet Methods of making incandescent lamps
US20050275349A1 (en) * 2004-06-09 2005-12-15 Patent-Treuhand-Gesellschaft Fur Elektrische Gluhlampen Mbh Method and apparatus for producing a lamp
EP1632988A2 (fr) * 2004-06-09 2006-03-08 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Procédé et appareil pour la fabrication d'une lampe
US7445534B2 (en) * 2004-06-09 2008-11-04 Patent-Trewhand-Gesellschaft für elektrische Glühlampen mbH Method of sealing a lamp by deformation of a pinch region using high-energy radiation
CN1707745B (zh) * 2004-06-09 2011-01-26 电灯专利信托有限公司 制造灯的方法和装置
CN103449710A (zh) * 2013-08-23 2013-12-18 武汉鑫友泰光电科技有限公司 厚壁石英玻璃管侧面自动接排气咀的装置及方法
CN103700573A (zh) * 2013-12-31 2014-04-02 詹云翔 一种灯泡封口机的烧结装置
CN103715062A (zh) * 2013-12-31 2014-04-09 詹云翔 一种灯泡封口设备
CN103715062B (zh) * 2013-12-31 2016-01-27 詹云翔 一种灯泡封口设备
CN103700573B (zh) * 2013-12-31 2016-01-27 詹云翔 一种灯泡封口机的烧结装置

Also Published As

Publication number Publication date
GB834424A (en) 1960-05-11
BE548671A (fr)
NL103279C (fr)
NL208036A (fr)
FR1159606A (fr) 1958-06-30
CH346613A (de) 1960-05-31

Similar Documents

Publication Publication Date Title
US2914371A (en) Method of making miniature lamps
US3250941A (en) Discharge lamp manufacture
US1461155A (en) Method of and apparatus for manufacturing incandescent lamps
US2965698A (en) Quartz tube pinch seal
US3211511A (en) Electric lamp manufacture
US5037342A (en) Method of making an electric lamp, and more particularly a lamp vessel in which electrodes are retained in the lamp by a pinch or press seal
US2006568A (en) Method of sealing metal wires to glass
US2259165A (en) Incandescent lamp and the like and method of making same
US3270237A (en) Electric lamp with single ended pinch seal
US2132538A (en) Machine for sealing evacuated vessels
US2391572A (en) Method for producing electronic devices
US1915361A (en) Method of sealing-in
US3295016A (en) Manufacture of electric incandescent lamps
CA1065611A (fr) Methode de fabrication d'un article contenant au moins une piece metallique scellee sous au moins une piece en verre
US2845557A (en) Arc tube mounting
US4086075A (en) Method of manufacturing an article containing at least one glass part in which a metal part is sealed in
US3870919A (en) Discharge lamp having blow-molded arc tube ends
US1945769A (en) Method of sealing off
US3462209A (en) Method of making vacuum type electric incandescent lamps
US2794699A (en) Manufacture of small lamps
US2242774A (en) Seal for discharge lamps
US2561838A (en) Tipping-off method
US2201694A (en) Method and apparatus for manufacturing electric lamps and similar articles
US2816398A (en) Apparatus for manufacture of a quartzto-metal foil press seal
US2494915A (en) Method of gas-filling and sealing vessels