EP0251372B1 - Electric incandescent lamp for series connection - Google Patents

Electric incandescent lamp for series connection Download PDF

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Publication number
EP0251372B1
EP0251372B1 EP87201097A EP87201097A EP0251372B1 EP 0251372 B1 EP0251372 B1 EP 0251372B1 EP 87201097 A EP87201097 A EP 87201097A EP 87201097 A EP87201097 A EP 87201097A EP 0251372 B1 EP0251372 B1 EP 0251372B1
Authority
EP
European Patent Office
Prior art keywords
supply wires
wire
power supply
incandescent lamp
mass
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
EP87201097A
Other languages
German (de)
French (fr)
Other versions
EP0251372A2 (en
EP0251372A3 (en
Inventor
Wolf-Dieter Bauch
Rolf Gervelmeyer
Heinz Dr. Merker
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.)
Koninklijke Philips NV
Original Assignee
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
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
Priority to DE3620373 priority Critical
Priority to DE19863620373 priority patent/DE3620373A1/en
Application filed by Philips Intellectual Property and Standards GmbH, Koninklijke Philips NV filed Critical Philips Intellectual Property and Standards GmbH
Publication of EP0251372A2 publication Critical patent/EP0251372A2/en
Publication of EP0251372A3 publication Critical patent/EP0251372A3/en
Application granted granted Critical
Publication of EP0251372B1 publication Critical patent/EP0251372B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01KELECTRIC INCANDESCENT LAMPS
    • H01K1/00Details
    • H01K1/62One or more circuit elements structurally associated with the lamp
    • H01K1/70One or more circuit elements structurally associated with the lamp with built-in short-circuiting device, e.g. for serially connected lamps

Description

  • The invention relates to an electric incandescent lamp for series connection with a translucent bulb, in which a filament is arranged between power supply wires that emerge through the wall of the bulb, in which bulb the power supply wires are electrically insulated from one another by a support member and the lamp is on Contains short-circuit element, which bridges the incandescent body and contains a glass mass in which metal powder is dispersed. Such a lamp is known from GB-A-10 77 863.
  • In the case of lamps of this type, the short-circuit element must be practically impermeable to current at the operating voltage, but the overvoltage which occurs when the incandescent body burns while the lamp is operating in series connection becomes conductive.
  • In the incandescent lamp known from GB-A-10 77 863, the short-circuit element consists of a sintered mixture of glass powder and iron powder, which is melted or sintered onto the power supply wires. The mixture can be introduced into a hollow support member, itself formed as a support member or sintered on the outside of the lamp bulb. This short-circuit element connecting the power supply wires initially acts as an insulator, but is said to break down when a high electrical voltage is applied and thus short-circuit the lamp when the incandescent body burns out. The breakdown that is to occur in this short-circuit element in the event of overvoltage is difficult to control Sizes such as mixture of powders, particle size distribution, melting or sintering on the power supply wires, moisture content in the manufacture of the lamp, etc. are heavily dependent. It is therefore very difficult to manufacture a reliable short-circuit element.
  • GB-A-10 77 863 also mentions a short-circuit element for electric incandescent lamps for series connection, which consists of copper oxide powder and glass powder. This organ is also non-conductive in the normal state and should only become conductive when an overvoltage is applied. It has been found in practice that this organ does not work reliably either.
  • The same applies to an incandescent lamp known from GB-A-839 160 with a short-circuit element made from a paste of copper powder, magnesium oxide and silicone resin, the proportion of magnesium oxide being 18 to 24% by weight of the copper proportion. This organ is also non-conductive, but should become conductive when an overvoltage is applied.
  • The invention has for its object to provide an electric incandescent lamp of the type mentioned with a short-circuit element which responds reliably when the incandescent body burns through and bridges the lamp in an electrically conductive manner. In addition, this lamp should also be easy to manufacture in mass production.
  • This object is achieved with the electric incandescent lamp of the type mentioned at the outset according to the invention in that at least one of the power supply wires consists of nickel wire, copper wire or copper sheathed wire and the glass mass is a fused mass which is 50 to 70% by weight of glass and 30 to 50% by weight. % of copper powder dispersed therein and with the power supply wires is fused, wherein the aforementioned power supply wire has an oxide skin at its melting point in the glass mass, which breaks through when the incandescent body burns through.
  • Here, the glass mass with copper powder dispersed in it is electrically conductive right from the start due to its high copper content. With this lamp, the resistance to the direct passage of current is generated by the oxide skin located at the melting point on the power supply wire, the thickness and thus breakdown voltage of which can be controlled by the conditions during the melting. This lamp has only one parameter that determines the breakdown voltage. All other known solutions, however, depend on several parameters and are therefore more vulnerable and more difficult to control from the outset.
  • It is advantageous that both power supply wires consist of nickel wire, copper wire or copper sheath wire and have an oxide skin at their melting points. The short-circuit element then comprises the already electrically conductive mass of fused glass and copper powder dispersed therein and the two initially non-conductive oxide skins.
  • The glass mass with copper powder of the incandescent lamp according to the invention dispersed therein can either be melted onto the support member holding the power supply wires, as the support member connecting the power supply wires in an electrically insulating manner, or can be fused to the bulb on the outside of the bulb.
  • If the mass has to be melted onto a support member, a mixture of copper powder and glass powder can be pressed into a ring and sintered, after which the ring is attached to the support member provided with the power supply wires and melted until the ring material on the support member forms a connection between the power supply wires. In a similar way, the short-circuit element can be produced on the outside of the piston.
  • If the mass itself is to be designed as a support member for the power supply wires, a mixture of copper powder and glass powder can be pressed and sintered, whereupon the ring is placed on the power supply wires which are arranged at a distance from one another and then melted to form an electrically conductive support member.
  • A glass is advantageously chosen that does not soften at the operating temperature of the lamp, but is easy to process. Glasses with a melting point in the range of 500-600 ° C have proven to be advantageous.
  • The oxide skin on a power supply wire can be easily, e.g. when it melts into the glass mass. The thickness of the oxide skin can be easily controlled by means of a protective gas jet directed at the melting point. A small number of attempts are sufficient to determine the conditions for obtaining a desired breakdown voltage. Instead of one, both power supply wires can have an oxide skin at the melting point.
  • Embodiments of the lamp according to the invention are explained below with reference to the drawing. Show it:
    • 1 shows a first lamp in side view,
    • Fig. 2 shows a second lamp in side view.
  • 1 and 2 contain a translucent bulb 1 made of glass, in which an incandescent body 2 is arranged between power supply wires 3, which emerge through the wall of the bulb 1. In the piston 1, the power supply wires 3 are connected to one another in an electrically insulating manner by a support member 4. The lamps contain a short-circuit element 5, which bridges the incandescent body 2 and contains a glass mass 5 with metal powder dispersed therein. The lamps are each provided with a screw base 7, which is connected to the power supply wires 3.
  • 1 and 2 contain power supply wires 3, which consist of nickel wire, copper wire or copper sheathed wire. The glass mass 6 is a fused mass which contains 50 to 70% by weight of glass and 30 to 50% by weight of copper powder dispersed therein and which is fused to the power supply wires 3. The power supply wires 3 have an oxide skin 8 at their melting points in the glass mass 6, which breaks through when the incandescent body 2 burns through.
  • The glass mass 6 is a layer in FIG. 1, which is located on the support member 4; 2, the glass mass 6 itself forms the support member 4.
  • The glass mass 6 with the copper powder dispersed therein is already electrically conductive at the beginning of the life of the lamps. The mass has a resistance of about 1 ohm. Nevertheless, the power supply wires 3 are connected to one another in an electrically insulating manner, since the Mass 6 attacks the oxide skin 8 of the wires 3. The mass 6 contains 60.4% by weight of glass, for example lead borosilicate glass with a melting point of about 550 ° C., and 39.6% by weight of copper powder, for example powder with a particle size between 8 and 60 μm with 90% by weight between 8 and 40 µm.
  • The short-circuit element in these lamps consists of the mass 6 and the oxide skins 8. Due to these oxide skins 8, there is an electrically non-conductive connection between the power supply wires 3 at the beginning of the life of the lamps, but when the incandescent body 2 burns out during operation of the lamps in series connection, the full voltage, which leads the row, on the short-circuit element 6, 8. The oxide skins 8 break through and the short-circuit element 6, 8 becomes electrically conductive.
  • The thickness of the oxide skins is chosen so that the breakdown voltage of the short-circuit element is between 50 and 200 V. In the exemplary embodiments described, the thickness of the oxide skins is 4 μm.
  • The lamp according to the invention has proven to be very reliable and easy to manufacture.
  • Composition 6 can be made by adding 58% by weight glass powder, 38% by weight copper powder and 4% by weight binder, e.g. Acrylic resin, mixed and pressed into rings. The rings can be sintered for solidification, e.g. for 20 seconds at 625 - 635 ° C. During this and when the rings fuse with the power supply wires, the binder decomposes and the decomposition products escape. The thickness of the oxide skins 8 is during the melting process by blowing with a protective gas, e.g. Nitrogen, can be influenced.

Claims (4)

  1. An electric incandescent lamp for series arrangement comprising a translucent envelope (1) in which a filament (2) is arranged between current-supply wires (3) which extend through the wall of the envelope (1) to the exterior, the current-supply wires (3) in this envelope (1) being interconnected in an electrically insulating manner by means of a support member (4) and the lamp comprising a short-circuit element (5) which shunts the filament (2) and comprises a vitreous mass (6) in which metal powder is dispersed, characterized in that at least one of the current-supply wires (3) is made from nickel wire, copper wire or copperclad wire and the vitreous mass (6) is a fused mass comprising 50 to 70% by weight of glass and 30 to 50% by weight of copper powder dispersed therein and is fused to the current-supply wires (3), the said current-supply wire (3) having at its sealing-in area in the vitreous mass (6) an oxide skin (8) which breaks down when the filament (2) burns through.
  2. An electric incandescent lamp as claimed in Claim 1, characterized in that both current-supply wires (3) are made from nickel wire, copper wire or copperclad wire.
  3. An electric incandescent lamp as claimed in Claim 1 or 2, characterized in that the vitreous mass (6) is applied by fusion to the support member (4).
  4. An electric incandescent lamp as claimed in Claim 1 or 2, characterized in that the vitreous mass (6) constitutes the support member (4).
EP87201097A 1986-06-18 1987-06-11 Electric incandescent lamp for series connection Expired - Lifetime EP0251372B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE3620373 1986-06-18
DE19863620373 DE3620373A1 (en) 1986-06-18 1986-06-18 Electric bulb for series circuit and method for their production

Publications (3)

Publication Number Publication Date
EP0251372A2 EP0251372A2 (en) 1988-01-07
EP0251372A3 EP0251372A3 (en) 1989-11-23
EP0251372B1 true EP0251372B1 (en) 1993-04-28

Family

ID=6303186

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87201097A Expired - Lifetime EP0251372B1 (en) 1986-06-18 1987-06-11 Electric incandescent lamp for series connection

Country Status (5)

Country Link
US (1) US4808885A (en)
EP (1) EP0251372B1 (en)
JP (1) JPH0719586B2 (en)
CA (1) CA1291204C (en)
DE (1) DE3620373A1 (en)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4334510A1 (en) * 1993-10-09 1994-02-24 Gluehlampenwerk Oberweisbach G Electrical glow lamp - comprising current bridge having active electrical region and passive mechanical region
US6583536B1 (en) * 2000-02-15 2003-06-24 James W Gibboney, Jr. Multiple, sequential filament lamp
US20050024877A1 (en) * 2001-03-19 2005-02-03 Frederick W Richard Decorative light strings and repair device
US7029145B2 (en) * 2001-03-19 2006-04-18 Integrated Power Components, Inc. Low voltage decorative light string including power supply
US6642660B1 (en) * 2002-07-12 2003-11-04 Whiter Shieh Filament shunt member for decorative lamp
US20050110427A1 (en) * 2003-11-24 2005-05-26 Frederick W. R. Decorative light strings
US20050152140A1 (en) * 2004-01-06 2005-07-14 Frederick W. R. Decorative sheeting with illuminated sources
US7253556B1 (en) 2006-12-08 2007-08-07 Tech Patent Licensing, Llc Light string socket with mechanical shunt
US7554266B1 (en) 2007-09-11 2009-06-30 Willis Electric Co., Ltd. Mechanical shunt for use in a socket in a string of lights
US7943211B2 (en) * 2007-12-06 2011-05-17 Willis Electric Co., Ltd. Three dimensional displays having deformable constructions
US7453194B1 (en) 2008-06-05 2008-11-18 Gibboney James W Mechanical shunt for use in the sockets of a string of lights
US20100289415A1 (en) * 2009-05-18 2010-11-18 Johnny Chen Energy efficient decorative lighting
US20110085327A1 (en) * 2009-10-14 2011-04-14 Johnny Chen Decorative light display with LEDs
US8568015B2 (en) 2010-09-23 2013-10-29 Willis Electric Co., Ltd. Decorative light string for artificial lighted tree
US8298633B1 (en) 2011-05-20 2012-10-30 Willis Electric Co., Ltd. Multi-positional, locking artificial tree trunk
US9157587B2 (en) 2011-11-14 2015-10-13 Willis Electric Co., Ltd. Conformal power adapter for lighted artificial tree
US8569960B2 (en) 2011-11-14 2013-10-29 Willis Electric Co., Ltd Conformal power adapter for lighted artificial tree
US8876321B2 (en) 2011-12-09 2014-11-04 Willis Electric Co., Ltd. Modular lighted artificial tree
US9572446B2 (en) 2012-05-08 2017-02-21 Willis Electric Co., Ltd. Modular tree with locking trunk and locking electrical connectors
US9179793B2 (en) 2012-05-08 2015-11-10 Willis Electric Co., Ltd. Modular tree with rotation-lock electrical connectors
US9044056B2 (en) 2012-05-08 2015-06-02 Willis Electric Co., Ltd. Modular tree with electrical connector
US10206530B2 (en) 2012-05-08 2019-02-19 Willis Electric Co., Ltd. Modular tree with locking trunk
US9671074B2 (en) 2013-03-13 2017-06-06 Willis Electric Co., Ltd. Modular tree with trunk connectors
US9439528B2 (en) 2013-03-13 2016-09-13 Willis Electric Co., Ltd. Modular tree with locking trunk and locking electrical connectors
US9894949B1 (en) 2013-11-27 2018-02-20 Willis Electric Co., Ltd. Lighted artificial tree with improved electrical connections
US8870404B1 (en) 2013-12-03 2014-10-28 Willis Electric Co., Ltd. Dual-voltage lighted artificial tree
US9883566B1 (en) 2014-05-01 2018-01-30 Willis Electric Co., Ltd. Control of modular lighted artificial trees
US10683974B1 (en) 2017-12-11 2020-06-16 Willis Electric Co., Ltd. Decorative lighting control

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE39886C (en) *
DE82315C (en) *
AT82135B (en) * 1913-10-23 1920-12-27 John Venning Safety device for electrical circuits.
US1681471A (en) * 1926-01-29 1928-08-21 Eckhardt Fritz Safety device for series-connected incandescent electric lamps
US1992844A (en) * 1931-07-23 1935-02-26 Gen Electric Cut-out for electric lamps
GB839160A (en) * 1957-05-18 1960-06-29 Lumalampan Ab Improvements in or relating to electric lamps
DE1489462A1 (en) * 1965-03-15 1969-04-24 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Electric Bulb for the series with a Stromzufuehrungsdraehte ueberbrueckenden Widerstandskoerper
FR1471502A (en) * 1965-03-15 1967-03-03 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh electric incandescent lamp for series arrangement with a resistor body connecting metal son of electroconducting
US3611010A (en) * 1969-09-15 1971-10-05 Westinghouse Electric Corp Series-type electric incandescent lamp with integral automatic cutout means
US4233543A (en) * 1977-12-09 1980-11-11 General Electric Company Internal shunt for series connected lamps
US4340841A (en) * 1980-05-22 1982-07-20 General Electric Company Internal shunt for series connected lamps

Also Published As

Publication number Publication date
US4808885A (en) 1989-02-28
DE3620373A1 (en) 1987-12-23
CA1291204C (en) 1991-10-22
JPS632245A (en) 1988-01-07
EP0251372A2 (en) 1988-01-07
EP0251372A3 (en) 1989-11-23
JPH0719586B2 (en) 1995-03-06

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