US2799152A - Flashlight lamp and igniter mounting method - Google Patents

Flashlight lamp and igniter mounting method Download PDF

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Publication number
US2799152A
US2799152A US347978A US34797853A US2799152A US 2799152 A US2799152 A US 2799152A US 347978 A US347978 A US 347978A US 34797853 A US34797853 A US 34797853A US 2799152 A US2799152 A US 2799152A
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US
United States
Prior art keywords
bulb
neck
stay wires
exhaust tube
flashlight
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
US347978A
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English (en)
Inventor
Keukens Hubertus Pieter
Westra Reinder
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.)
US Philips Corp
North American Philips Co Inc
Original Assignee
US Philips Corp
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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US2799152A publication Critical patent/US2799152A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H01J9/245—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps
    • H01J9/247—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps specially adapted for gas-discharge lamps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K5/00—Light sources using charges of combustible material, e.g. illuminating flash devices
    • F21K5/02—Light sources using charges of combustible material, e.g. illuminating flash devices ignited in a non-disrupting container, e.g. photo-flash bulb
    • 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
    • H01J5/44—Annular seals disposed between the ends of the vessel

Definitions

  • the invention relates to'a method of manufacturing flashlight lamps of the kind comprising a socket and a bulb provided with actinically burning material in the shape of foils, wires or strips, with a gas filler and with an electrical ignition device comprising a filament wire mounted on two stay wires and to flashlight lamps manufactured by this method.
  • the manufacture of these lamps comprises a manipulation for mounting the ignition device in the bulb provided with actinically burning material; this mounting must be carried out in a manner such that thereupon the gas filler can be introduced.
  • the ignition device is frequently mounted in a glass body, which is sealed in the neck of the bulb in a manner such that the bulb is closed but for a tube secured in this glass body and referred to hereinafter as an exhaust tube.
  • the exhaust tube through which the gas filler must be introduced into the bulb, is secured in the opening of the neck, the stay wires being fixed at the same time in the positions they have occupied, in a manner such that the filament wire takes up the desired position in the bulb and the stay wires project from the wall at the area where the exhaust tube is secured to the neck of the bulb.
  • the bead mount is arranged in the desired position in the bulb by means of a pressure member, then the ends of'the stay wires projecting from the bulb neck are bent along the outer surface of the bulb and secured there in position, after which the pressure member is removed and the exhaust tube is secured in the neck opening in a manner such that at the joint the stay wires extend through the wall.
  • the invention relates to a method of providing an ignition device in the form of a bead mount in the bulb of a flashlight lamp and is characterised in that the bead mount is introduced into the bulb by means of a pressure member, the parts of the stay wires projecting from the bulb being bent along the outer surface of the bulb and secured there in position, the pressure member being re moved and the exhaust tube being secured in the neck in a manner such that the stay wires extend through the bulb wall at the joint.
  • the wires may be secured to the outer surface of the bulb by locally weakening the glass and pressing the wire ends against this weakened area.
  • an adhesive for this purpose. If desired, this operation may be combined with the application of the outer lacquer layer, the lacquer layer thus serving at the same time as an adhesive, or else, the lacquer layer already provided may be weakened locally.
  • the ends of the wires are clamped against the bulb wall.
  • a bulb having a substantially cylindrical neck, a ring fitting narrowly around the neck being slipped on the neck and the wire ends applied thereto.
  • the ends of the stay wires need be fastened only temporarily to the outer surface of the bulb. After the exhaust tube has been secured in the bulb neck, the ends of the stay wires may be released and connected in a suitable manner to the contact points of a cap secured to the bulb.
  • the wire ends secured to the outer sur face of the bulb, more particularly, to the substantially cylindrical neck portion of the bulb are very suitable to serve as current conductors.
  • the gas filler introduced into the bulb and the exhaust tube sealed off, a flashlight lamp of simple and cheap construction is obtained, the socket of which is formed by the sealed-off exhaust tube and the neck of the bulb with the parts of the stay wires of the bead mount serving as current conductors, applied thereto.
  • the bulb neck is not made circular, so that the flashlight lamp can be secured in a suitable holder only in one or in two positions in which the current conductors are in contact with current-supply contacts in the holder.
  • the method described above is particularly suitable for the manufacture of small flashlight lamps.
  • use is made of ignition paste applied to the bead mount and if the exhaust tube is secured to the edge of the bulb neck by weakening the glass at this area, the ignition paste frequently ignites due to the heating of the stay wires bent around the weakened edge of the neck.
  • the distance measured along the wire from the ignition paste to the seal is chosen to be more than 15 ms.
  • bulbs having a capacity of less than 12 ccms use is made of a bulb shape which deviates from the spherical types of this size produced in the manufacture of incandescent lamps, since the ignition must take place as much as possible in the centre. Therefore for flashlight lamps having a capacity of less than 12 ccms. use is made of an elongated shape, having an axis of at least 30 mms, this axis coinciding with the axis of the socket.
  • Figs. 1 to 3 illustrate the various steps of mounting an ignition device in the bulb of a flashlight lamp in accordance with the present invention
  • Fig. 4 is a bottom plan view of the aforesaid flashlight lamp.
  • Fig. 1 illustrates the condition in which the glass bulb 1 which is provided with actinically burning, Wire-shaped material 2 and the capacity of which is about 8 ccms, the longitudinal axis having a length of 38 mms., the short axis a length of 22 rnrns, is arranged with the neck opening turned upwards, the bead mount 4 being then introduced into this neck opening; the actinically burning wire filler 2 hinders the bead mount in taking up the desired position, which is indicated by broken lines in the figure.
  • Pig. 2 shows the condition in which, after the bead mount has been introduced into the bulb by a pressure member (not shown), the ends of the stay wires 5 and 5' are bent along the outer surrace of the bulb wall and clamped against the neck 6 by means of a cardboard ring 7, so that the filament wire 8 takes up the desired position in the buib and the bead mount 4 is fixed in this position.
  • the rotating gas flames 9 and 9 weaken the glass at the neck opening 3 of the bulb 11 and also the glass at the edge of the exhaust tube 10, which is held slightly spaced apart from the neck opening 3 and fterwards pressed against this neck.
  • Fig. 3 shows a flashlight lamp which is obtained after the exhaust tube 10, as described above, has been secured in the neck opening 3 and the bulb 1 has been provided with the desired gas filler, after which the exhaust tube has been sealed oil at 11.
  • the socket of this flashlight lamp is constituted by the sealed-oil exhaust tube 10 and the neck of the bulb 6; to the outer surface of this neck are applied the two ends and 5 of the stay wires, forming part of the bead mount, operating as conductors for the current from supply contacts of a suitable holder (not shown).
  • Fig. 4 is a bottom view of a flashlight lamp as shown in Fig. 3.
  • the cylindrical bulb neck 6 is provided with two ribs, so that the sectional area of the neck is not circular and the socket can thus be fixed in r a suitable holder only in the position in which current can be conveyed.
  • a method of mounting an ignition device having a head mount, a filament, and a plurality of stay wires in a flashlamp bulb having a neck portion comprising applying a coating of lacquer on the outer surfaces of said neck portion, inserting said ignition device through said neck portion and into said bulb with the ends of the stay wires projecting from the neck portion, bending the end portions of the stay wires so that they contact the outer surface of the neck portion, applying a close-fitting ring to said neck portion to hold said end portions in contact with the lacquered surface, fusing an exhaust tube to the end of said neck portion while causing said lacquer layer to soften locally and attach said ring to the said neck portion.
  • a flash lamp comprising an elongated bulb provided with a neck portion, an ignition device in said bulb including a bead mount, ignition paste applied to said head mount, a filament and a plurality of stay wires on said bead mount, said stay wires positioned around said neck portion and means fixing said stay wires to the outer surface of said neck portion including a substan tiaily flat ring and a lacquer coating on said neck portion, said stay wires operating as current conductors, and a sealed-off exhaust tube which together with said neck portion form a non-circular flash lamp mounting base, the distance of each of the stay wires from said ignition paste to the portion of said wire around said neck portion exceeds 15 mms. and the long axis of said bulb is at least mms, said flat ring additionally serving as a stop member.
  • a flash lamp comprising an elongated bulb provided with a neck portion, an ignition device in said bulb including a bead mount, ignition paste applied to said head mount, a filament and a plurality of stay wires on said bead mount, said stay wires positioned around said neck portion, and means fixing said stay wires to the outer surface of said neck portion including a substantially flat ring and a lacquer coating on said neck portion, said stay wires operating as current conductors, and a sealed-off exhaust tube which together with said neck portion form a non-circular flash lamp mounting base, said flat ring additionally serving as a stop member.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
US347978A 1952-05-20 1953-04-10 Flashlight lamp and igniter mounting method Expired - Lifetime US2799152A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL744848X 1952-05-20

Publications (1)

Publication Number Publication Date
US2799152A true US2799152A (en) 1957-07-16

Family

ID=19822793

Family Applications (1)

Application Number Title Priority Date Filing Date
US347978A Expired - Lifetime US2799152A (en) 1952-05-20 1953-04-10 Flashlight lamp and igniter mounting method

Country Status (5)

Country Link
US (1) US2799152A (en(2012))
BE (1) BE520032A (en(2012))
DE (1) DE931148C (en(2012))
FR (1) FR1080091A (en(2012))
GB (1) GB744848A (en(2012))

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1036642B (de) * 1954-08-07 1958-08-14 Philips Nv Folienblitzlampe mit Glassockel
US3432803A (en) * 1968-02-15 1969-03-11 Philco Ford Corp High voltage connection for cathode ray tube

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1716167A (en) * 1925-05-18 1929-06-04 Westinghouse Lamp Co Apparatus for and method of aligning elements in sealed containers
US1742153A (en) * 1925-05-23 1929-12-31 Gen Electric Sealing machine for incandescent lamps and similar articles
US2006568A (en) * 1932-07-01 1935-07-02 Westinghouse Lamp Co Method of sealing metal wires to glass
US2023628A (en) * 1929-10-10 1935-12-10 Western Electric Co Method of and apparatus for manufacturing electric lamps
US2359483A (en) * 1942-10-17 1944-10-03 Gen Electric Vitreous electrical device and its fabrication
US2699659A (en) * 1951-02-03 1955-01-18 Sylvania Electric Prod Photoflash lamp

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL40440C (en(2012)) * 1933-04-21

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1716167A (en) * 1925-05-18 1929-06-04 Westinghouse Lamp Co Apparatus for and method of aligning elements in sealed containers
US1742153A (en) * 1925-05-23 1929-12-31 Gen Electric Sealing machine for incandescent lamps and similar articles
US2023628A (en) * 1929-10-10 1935-12-10 Western Electric Co Method of and apparatus for manufacturing electric lamps
US2006568A (en) * 1932-07-01 1935-07-02 Westinghouse Lamp Co Method of sealing metal wires to glass
US2359483A (en) * 1942-10-17 1944-10-03 Gen Electric Vitreous electrical device and its fabrication
US2699659A (en) * 1951-02-03 1955-01-18 Sylvania Electric Prod Photoflash lamp

Also Published As

Publication number Publication date
FR1080091A (fr) 1954-12-06
DE931148C (de) 1955-08-01
GB744848A (en) 1956-02-15
BE520032A (en(2012))

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