EP0465198A2 - Scheinwerferlampe - Google Patents

Scheinwerferlampe Download PDF

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Publication number
EP0465198A2
EP0465198A2 EP91305963A EP91305963A EP0465198A2 EP 0465198 A2 EP0465198 A2 EP 0465198A2 EP 91305963 A EP91305963 A EP 91305963A EP 91305963 A EP91305963 A EP 91305963A EP 0465198 A2 EP0465198 A2 EP 0465198A2
Authority
EP
European Patent Office
Prior art keywords
lamp
reflector
bottom portion
envelope
electrical conductors
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.)
Withdrawn
Application number
EP91305963A
Other languages
English (en)
French (fr)
Other versions
EP0465198A3 (en
Inventor
James Mark Hanson
Gustino Joseph Lanese
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of EP0465198A2 publication Critical patent/EP0465198A2/de
Publication of EP0465198A3 publication Critical patent/EP0465198A3/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/02—Incandescent bodies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/0005—Fastening of light sources or lamp holders of sources having contact pins, wires or blades, e.g. pinch sealed lamp
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources

Definitions

  • This invention relates generally to a multifaceted reflector lamp and more particularly to a multifaceted reflector lamp having an inner tungsten-halogen lamp for its light source and constructed in the manner enabling line voltage operation.
  • a variety of multifaceted reflector lamps are already known which employ a tungsten-halogen lamp as the light source to provide a precisely focused light beam pattern for many end product applications such as display and spot lighting.
  • Conventional reflector lamps of this type such as disclosed in U.S. Patents 4,021,-659 and 4,494,176, both assigned to the present assignee, are of relatively compact construction having the tungsten-halogen lamp being mounted in the base of the reflector member and with said light source being operated at relatively low voltages, typically twelve volts.
  • Such low voltage operation of the conventional lamps can further require transformers in order to lower the customary line voltages available which understandably raises lamp costs for the user. Accordingly, efforts have already been made by lamp manufacturers to introduce a lamp of this type for operation at existing line voltages of 100-130 volts.
  • the higher voltage operation lamps of this type introduced so far have been further constructed in a manner enabling lamp installation in existing screw type socket fixtures.
  • One such lamp extends the length of said lamp with a ceramic collar or skirt being adhesively bonded at one end to the base of a conventional compact reflector member with the opposite end of said ceramic extension being adhesively bonded to a candelabra sized metal screw base shell.
  • a conventional compact reflector member is encased in a ceramic housing of extended length and with the other end of said ceramic housing being adhesively bonded to a conventional sized line voltage screw base shell.
  • Both of said available lamp constructions prove undesirable in proliferating the number of lamp parts which must be assembled together as well as the attended costs in doing so.
  • the particular ceramic parts employed for said lamp constructions are found to have significant weight thereby possibly risking dislodgement if installed in overhead fixtures as well as further requiring fixture manufacturers and users to modify features in the existing fixtures.
  • Illustrative embodiments of the invention disclosed herein seek: to provide an improved multifaceted reflector lamp for operation at line voltages such as 100-130 or 200-250 volts; to provide such higher voltage lamp construction having an extended length enabling installation in existing socket fixtures; and/or to provide a multifaceted reflector lamp for operation at line voltages which employs an improved tungsten-halogen lamp as the light source.
  • a reflector member in an embodiment of the present invention employs a multifaceted parabolic reflecting surface which terminates in a longitudinally extending bottom portion, the bottom portion being provided with a circular outer contour sized at the terminal end to accommodate insertion into a hollow metal screw base shell for adhesive bonding thereto while further being provided with a hollow internal cavity reduced in size at the reflector end of said bottom portion to provide a slot opening into which a tungsten-halogen lamp member is inserted for adhesive bonding thereto while the external lead conductors for said lamp member extend beyond the opposite end of said hollow cavity for electrical connection to the hollow metal screw base shell.
  • Such assembled construction enables the tungsten-halogen lamp to be positioned approximately at the focal point of the multifaceted parabolic reflecting surface with the lamp member comprising an elongated sealed envelope of light transmissive vitreous ceramic material containing an inert gas fill and a halogen substance together with an axially aligned tungsten filament coil being suspended therein from electrical conductors sealed at one end of the lamp envelope in a pinch seal region and protruding from the sealed envelope.
  • the tungsten filament coil in said lamp member is sized for line voltage operation at the desired wattage rating in a customary manner with selection of the improved tungsten filament wire disclosed in the aforementioned commonly assigned patent application desirably enabling a more sag resistant coil construction to be formed.
  • An improved reflector lamp construction of this type can generally further include a lens element being affixed at the top portion of the reflector member.
  • the lamp construction can employ a vitreous lamp envelope formed with fused quartz but which generally further requires that the electrical conductors supporting the lamp filament be hermetically sealed within the lamp envelope with thin refractory metal foil elements as illustrated in the above cited 4,021,659 prior art patent.
  • various glass-halogen lamp constructions can be employed wherein the vitreous lamp envelope is formed with a refractory glass such as aluminosilicate glass compositions, and which differs structurally from a quartz-halogen lamp primarily with respect to the means employed to hermetically seal the filament electrical conductors to the lamp envelope.
  • a reflector lamp enabling installation in line voltage socket fixtures comprises:
  • FIG. 1 is a perspective view illustrating one reflector lamp embodiment of the present invention.
  • FIG. 2 is a side view partially in cross section for the FIG. 1 lamp embodiment.
  • the reflector lamp 10 includes a reflector member 12 secured to a hollow metal screw base shell 14 in the manner hereinafter defined and a tungsten-halogen lamp 16.
  • Reflector 12 has an internal reflective parabolic surface 18 which further includes a pattern of multiple facets 18a molded into the glass member when initially molded or pressed in a conventional manner.
  • a reflective coating is further deposited on the internal parabolic surface which may be typically a silver, aluminum or dichroic type coating.
  • Bottom portion 20 extending from the base of said parabolic surface 18 is of a circular shape with a slightly downward conical contour 21 being provided to facilitate molding of said reflector member.
  • Bottom portion 20 further includes a hollow internal cavity 22 reduced in size at the reflector end of said bottom portion to provide a slot opening 26.
  • a central opening (not shown in the present drawing) is also provided at the opposite end of said bottom portion to enable lamp member 16 to be electrically connected to the hollow metal screw base shell 14.
  • Parabolic reflecting surface 18 is further closed at its top end with a conventional lens element 30.
  • tungsten-halogen lamp 16 is physically mounted in slot opening 26 of the reflector bottom portion for adhesive bonding thereto with a suitable cement material (not shown).
  • Tungsten-halogen lamp 16 includes an axially aligned tungsten filament coil 31 hermetically sealed within an elongated lamp envelope 33 so as to have the center of the tungsten coil reside approximately at the optical focal point of reflector 12.
  • Filament coil 31 is physically suspended within lamp envelope 33 by a composite assembly of "lead wire" type electrical conductors 34, 36, 38 and 40. More particularly, such cooperating lead wire construction employs a first pair of electrical conductors 34 and 36 connected at one end to the lamp filament coil 31 while being individually connected at the opposite ends to larger diameter electrical conductors 38 and 40 in the stem press region 42 of the lamp envelope 33.
  • suitable inner electrical conductors 34 and 36 can be formed with fine size diameter molybdenum alloy whereas suitable protruding electrical conductors 38 and 40 can be formed with an electrically conductive metal having greater thermal expansion characteristics, such as nickel plated iron or nickel iron alloy at larger diameter size.
  • Electrical conductors 38 and 40 are shown (in phantom) to extend through the entire length of reflector bottom portion 20 and protrude therefrom for electrical connection to the hollow metal shell base 14.
  • Fuse element 41 has also been shown (in phantom) for connection to conductor 40 in the conventional manner.
  • Patent 4,524,302 typical filament requirements for both low voltage type and line voltage type tungsten-halogen lamp constructions. As can be seen from reference to Tables 2-3 therein, typical 120 volt A-line type lamps require much longer filament wire length and significantly smaller wire diameter size than required for the lower operating voltage lamps. It becomes increasingly important in the present line voltage lamp construction, therefore, that the filament coil resist undue sagging or distortion at the relatively extreme lamp operating temperatures being encountered. Accordingly, construction of the low-sag tungsten filament coil as disclosed in the copending application specifically incorporated herein by reference is contemplated as a still further means of achieving optimum performance in the present reflector lamp construction.
  • FIG. 2 A side view of the FIG. 1 lamp embodiment is depicted in FIG. 2 to still further help explain said lamp construction. More particularly, a cross section of the hereinbefore illustrated reflector lamp 10 is provided enabling more details of the electrical interconnection between tungsten-halogen lamp 16 and hollow metal screw base shell 14 to be seen along with the particular physical disposition of said lamp member in reflector 12. Accordingly, it can be seen in the present drawing that the press seal end 42 of tungsten-halogen lamp 16 extends below the slot opening 26 provided in said reflector member and with joinder thereto being further provided by a suitable electrically non-conductive refractory cement 44. Bottom portion 20 of said reflector member 12 can also be seen similarly joined to base shell 14 with a suitable non-conductive cement 46.
  • protruding conductor 38 Electrical interconnection of protruding conductor 38 to the side of hollow metal base shell 14 can be provided in the customary manner such as by welding or soldering whereas remaining protruding conductor 40 can be similarly interconnected to a center eyelet 48 provided in said hollow metal base shell. While fuse element 41 is shown in the herein depicted lamp construction as a discrete component it can be further appreciated that parameters of electrical conductor 40 itself can also be selected to serve such function.
  • the parabolic reflecting surface of the reflector member herein illustrated can be provided with already known contours while the reflective surface can be provided with stippling or a diffuse reflective coating as well as still other known multifaceted configurations.
  • the present tungsten-halogen lamp construction can include various type tungsten filament coils, sized for the particular wattage requirements, as well as various shape elongated lamp envelope configurations.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP19910305963 1990-07-02 1991-07-01 Reflector lamp Withdrawn EP0465198A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US54700990A 1990-07-02 1990-07-02
US547009 1995-10-23

Publications (2)

Publication Number Publication Date
EP0465198A2 true EP0465198A2 (de) 1992-01-08
EP0465198A3 EP0465198A3 (en) 1992-02-19

Family

ID=24182979

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910305963 Withdrawn EP0465198A3 (en) 1990-07-02 1991-07-01 Reflector lamp

Country Status (2)

Country Link
EP (1) EP0465198A3 (de)
JP (1) JPH04229949A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0595412A1 (de) * 1992-10-30 1994-05-04 Koninklijke Philips Electronics N.V. Lampe/reflektor Einheit
EP0699864A1 (de) * 1994-08-29 1996-03-06 Koninklijke Philips Electronics N.V. Elektrische Reflektorleuchte
EP1154464A1 (de) * 2000-05-12 2001-11-14 General Electric Company Glühlampe für Beleuchtungssysteme mit hohem Wirkungsgrad
WO2002039012A2 (en) * 2000-11-09 2002-05-16 General Electric Company Reflector lamps
WO2004044482A3 (en) * 2002-11-11 2005-07-28 Koninkl Philips Electronics Nv Electric reflector lamp and assembling process thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6154153B2 (ja) * 2013-02-14 2017-06-28 大塚電子株式会社 標準光源および測定方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3513347A (en) * 1967-08-24 1970-05-19 Westinghouse Electric Corp Prefocused filament-mount structure for sealed-beam type incandescent lamp and method of manufacture
US3522470A (en) * 1968-03-29 1970-08-04 Sylvania Electric Prod Quartz-halogen projection lamp
US4021659A (en) * 1975-10-30 1977-05-03 General Electric Company Projector lamp reflector
DE2926854A1 (de) * 1978-07-03 1980-01-17 Tokyo Shibaura Electric Co Reflektierende lampe
US4494176A (en) * 1984-03-14 1985-01-15 General Electric Company Lamps having multiple and aimed parabolic sections for increased useful light output

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57199165A (en) * 1981-06-03 1982-12-07 Koito Mfg Co Ltd Incandescent bulb
JPS5999654A (ja) * 1982-11-30 1984-06-08 東芝ライテック株式会社 反射鏡付ハロゲン電球
CA1245201A (en) * 1983-10-03 1988-11-22 Arnold E. Westlund, Jr. Projection lamp unit
JPS60139953A (ja) * 1983-12-28 1985-07-24 Bridgestone Cycle Co 無段変速装置
JPS6184478A (ja) * 1984-10-01 1986-04-30 Nippon Raintsu Kk 排気管継手部のシ−ル用部材
JPS62291857A (ja) * 1986-06-11 1987-12-18 松下電子工業株式会社 白熱電球
JPS6330117U (de) * 1986-08-12 1988-02-27
JPS6482453A (en) * 1987-09-25 1989-03-28 Matsushita Electric Ind Co Ltd Lamp with reflecting mirror

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3513347A (en) * 1967-08-24 1970-05-19 Westinghouse Electric Corp Prefocused filament-mount structure for sealed-beam type incandescent lamp and method of manufacture
US3522470A (en) * 1968-03-29 1970-08-04 Sylvania Electric Prod Quartz-halogen projection lamp
US4021659A (en) * 1975-10-30 1977-05-03 General Electric Company Projector lamp reflector
DE2926854A1 (de) * 1978-07-03 1980-01-17 Tokyo Shibaura Electric Co Reflektierende lampe
US4494176A (en) * 1984-03-14 1985-01-15 General Electric Company Lamps having multiple and aimed parabolic sections for increased useful light output

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0595412A1 (de) * 1992-10-30 1994-05-04 Koninklijke Philips Electronics N.V. Lampe/reflektor Einheit
EP0699864A1 (de) * 1994-08-29 1996-03-06 Koninklijke Philips Electronics N.V. Elektrische Reflektorleuchte
EP1154464A1 (de) * 2000-05-12 2001-11-14 General Electric Company Glühlampe für Beleuchtungssysteme mit hohem Wirkungsgrad
WO2002039012A2 (en) * 2000-11-09 2002-05-16 General Electric Company Reflector lamps
WO2002039012A3 (en) * 2000-11-09 2003-01-23 Gen Electric Reflector lamps
WO2004044482A3 (en) * 2002-11-11 2005-07-28 Koninkl Philips Electronics Nv Electric reflector lamp and assembling process thereof

Also Published As

Publication number Publication date
JPH04229949A (ja) 1992-08-19
EP0465198A3 (en) 1992-02-19

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