US3764845A - Electric filament lamp - Google Patents

Electric filament lamp Download PDF

Info

Publication number
US3764845A
US3764845A US00248219A US3764845DA US3764845A US 3764845 A US3764845 A US 3764845A US 00248219 A US00248219 A US 00248219A US 3764845D A US3764845D A US 3764845DA US 3764845 A US3764845 A US 3764845A
Authority
US
United States
Prior art keywords
loop
supporting wire
lamp
electric filament
brace
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
US00248219A
Other languages
English (en)
Inventor
Fraeye D De
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
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 US3764845A publication Critical patent/US3764845A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/18—Mountings or supports for the incandescent body

Definitions

  • ABSTRACT The invention relates to an electric filament lamp having a tubular lamp envelope provided with a pinch seal in which two series-arranged filaments are incorporated which are coupled by a brace.
  • the brace comprises a loop in which a supporting wire is inserted.
  • the shape of the loop and the cross-section of the brace are non-circular, for example, elongate, so as to limit the mutual rotatability.
  • the invention relates to an electric filament lamp, in particular a halogen filament lamp, which comprises a tubular lamp envelope having on at least one end a pinch seal with current conductors incorporated therein, two series-arranged filaments being stretched in the longitudinal direction of the lamp envelope, said filaments being connected electrically at one of their ends to the current conductors and, at their ends most remote from the pinch seal, being coupled by means of a brace which in or near the centre of its length comprises at least one loop in which the end of a supporting wire fixed in the lamp envelope is secured, the loop being secured to the supporting wire so as to be non rotatable in the plane in-which the loop is located.
  • a filament lamp is known, inter alia, from the Dutch published Pat. application No. 6,902,879.
  • the lamp described in the said Dutch patent application comprises a supporting wire of which the end inserted in the loop extends coaxially with the lamp envelope, the supporting wire being formed from a circular wire.
  • the filaments permanently assume a prescribed position in the lamp envelope.
  • the loop of the brace is secured to the end of the supporting wire by means of a spot weld.
  • the brace is prevented from pivoting about the supporting wire. Any pivoting of the brace relative to the supporting wire would actually have for its result that the filaments do not assume the prescribed position in the lamp envelope.
  • the electric filament lamp according to the invention is characterized in that the loop and the cross-section of the supporting wire have noncircular shapes which have been chosen to be so that in the assembled condition of the loop and the supporting wire they limit the mutual rotatability thereof.
  • a favourable embodiment of the electric filament lamp according to the invention is characterized in that at least at the area of the connection to the loop, the supporting wire comprises at least one flat side against "which a part of the loop bears.
  • the supporting wire has an elongate cross-section at least at the area of the connection to the loop.
  • FIG. 1 shows an embodiment of the lamp according to the invention and FIG. 2 shows the brace used therein with the end of the supporting wire incorporated in the loop.
  • the filament lamp shown in FIG. 1 comprises a lamp envelope 1 which is closed at its baseby a pinch 2.
  • Incorporated in the pinch are foils 3, 4 to which the contact members 5, 6 projecting from the lamp and the mandrils 7, 8 are secured.
  • the helically wound filaments 9, 10 are stretched in the lamp envelope 1 and are slid with their one end over the mandrils 7 and 8, respectively, and are secured to the wire brace 11 with their other end.
  • the filaments 9 and 10 are connected in series by the brace 11.
  • a supyorting wire 12 which at its one end is sealed in the pinch 2 and at its other end supports in the space 13 which remains after sealing the exhaust tube.
  • the filaments 9, 10 and the supporting wire 12 are supported by a quartz beam 14. y
  • the supporting wire is formed from a molybdenum wire having a square cross-section (FIG. 2).
  • the brace 11 is wound around the end 15 of the supporting wire 12, as a result of which a loop 16 is formed which is present in the centre of the brace.
  • a loop 16 is formed which is present in the centre of the brace.
  • the fil aments 9, 10 will thus assume the desirable position in the lamp envelope also when the lamp has been in operation for some time.
  • a circular supporting wire may also be used, which has a non-circular, for example flattened, cross-section only at the area of the loop.
  • An electric filament lamp comprising a tubular lamp envelope having on at least one end a pinch seal with current conductors incorporated therein, two series-arranged filaments being stretched in the longitudinal direction of the lamp envelope, said filaments being connected electrically atone of their ends to the current conductors and, at their ends most remote from the pinch seal, being coupled by means of a brace which near the centre of its length comprises at least one loop in which the end of a supporting wire fixed in the lamp envelope is secured, the loop being secured to the supporting wire so as to be non-rotatable in the plane in which the loop is located, and wherein the loop and the cross-section of the supporting wire have noncircular shapes which have been chosen to be so that in the assembled condition of the loop and the supporting wire they limit the mutual rotatability thereof.

Landscapes

  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
US00248219A 1971-05-19 1972-04-27 Electric filament lamp Expired - Lifetime US3764845A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7106852A NL7106852A (de) 1971-05-19 1971-05-19

Publications (1)

Publication Number Publication Date
US3764845A true US3764845A (en) 1973-10-09

Family

ID=19813199

Family Applications (1)

Application Number Title Priority Date Filing Date
US00248219A Expired - Lifetime US3764845A (en) 1971-05-19 1972-04-27 Electric filament lamp

Country Status (8)

Country Link
US (1) US3764845A (de)
BE (1) BE783623A (de)
CA (1) CA956692A (de)
DE (1) DE2223444A1 (de)
FR (1) FR2138148B1 (de)
GB (1) GB1325658A (de)
IT (1) IT955571B (de)
NL (1) NL7106852A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4414484A (en) * 1980-07-14 1983-11-08 U.S. Philips Corporation Electric incandescent lamp
US5146134A (en) * 1990-03-15 1992-09-08 Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen M.B.H. Halogen incandescent lamp, particularly for operation from power networks, and method of its manufacture
US5500566A (en) * 1991-12-09 1996-03-19 Cooper Industries, Inc. Light bulb filament dampening system
WO2006137036A3 (en) * 2005-06-24 2007-08-09 Koninkl Philips Electronics Nv Halogen incandescent lamp and method for manufacturing such a lamp

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2300553B (en) * 1995-03-10 1999-07-28 Ge Lighting Ltd Heat source

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2037217A (en) * 1934-04-17 1936-04-14 Heintz & Kaufman Ltd Cathode
US2218346A (en) * 1938-07-08 1940-10-15 Spaeth Charles Gas-filled incandescent electric lamp
US3590305A (en) * 1969-02-26 1971-06-29 Westinghouse Electric Corp Incandescent projection lamp having a prealigned proximity reflector and filament mount assembly

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2037217A (en) * 1934-04-17 1936-04-14 Heintz & Kaufman Ltd Cathode
US2218346A (en) * 1938-07-08 1940-10-15 Spaeth Charles Gas-filled incandescent electric lamp
US3590305A (en) * 1969-02-26 1971-06-29 Westinghouse Electric Corp Incandescent projection lamp having a prealigned proximity reflector and filament mount assembly

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4414484A (en) * 1980-07-14 1983-11-08 U.S. Philips Corporation Electric incandescent lamp
US5146134A (en) * 1990-03-15 1992-09-08 Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen M.B.H. Halogen incandescent lamp, particularly for operation from power networks, and method of its manufacture
US5500566A (en) * 1991-12-09 1996-03-19 Cooper Industries, Inc. Light bulb filament dampening system
WO2006137036A3 (en) * 2005-06-24 2007-08-09 Koninkl Philips Electronics Nv Halogen incandescent lamp and method for manufacturing such a lamp
US20100207523A1 (en) * 2005-06-24 2010-08-19 Koninklijke Philips Electronics, N.V. Halogen incandescent lamp and method for manufacturing such a lamp
CN101203936B (zh) * 2005-06-24 2011-07-13 皇家飞利浦电子股份有限公司 卤素白炽灯及制造此种灯的方法

Also Published As

Publication number Publication date
FR2138148B1 (de) 1973-07-13
CA956692A (en) 1974-10-22
DE2223444A1 (de) 1972-11-30
FR2138148A1 (de) 1972-12-29
GB1325658A (en) 1973-08-08
IT955571B (it) 1973-09-29
NL7106852A (de) 1972-11-21
BE783623A (fr) 1972-11-17

Similar Documents

Publication Publication Date Title
US2864025A (en) Infrared ray generating device
US2910605A (en) Radiant energy device
US3736455A (en) Support for the filament body of a tubular lamp
US3764845A (en) Electric filament lamp
US3634722A (en) Tungsten halogen lamp having improved filament support
US3270238A (en) Electric lamp filament support
US3211943A (en) Electric incandescent lamp
US3466489A (en) Incandescent lamp
US3515930A (en) Compact bent end electric lamp
US3678319A (en) Filament support for tubular lamp
US3441774A (en) Halogen-cycle incandescent lamp with planar filament
US3743375A (en) Halogen filament lamp
US2597681A (en) Electric incandescent lamp
US3441776A (en) Filament support for incandescent electric lamps
US3777207A (en) Halogen filament lamp having stabile filament supporting means
US3801178A (en) Method of providing support for conductors of an electric filament or discharge lamp
US3717783A (en) Electric incandescent lamp comprising an internal fuse
US3784865A (en) Filament support
US2165135A (en) Wire electrode
US4039885A (en) Electric incandescent lamp
US3854180A (en) Method of connecting a filament to a support in an electric filament lamp
US3286116A (en) Electric incandescent lamp filament support
US2791714A (en) Light projection device
EP0020075B1 (de) Verbesserungen an Lampen mit geradlinigem Glühfaden
US3736454A (en) Electric filament lamp or discharge lamp