US2449679A - Lamp filament support and connection - Google Patents

Lamp filament support and connection Download PDF

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Publication number
US2449679A
US2449679A US565825A US56582544A US2449679A US 2449679 A US2449679 A US 2449679A US 565825 A US565825 A US 565825A US 56582544 A US56582544 A US 56582544A US 2449679 A US2449679 A US 2449679A
Authority
US
United States
Prior art keywords
filament
coil
connection
wire
spud
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
US565825A
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English (en)
Inventor
Irving H Van Horn
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
Priority to BE476889D priority Critical patent/BE476889A/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US565825A priority patent/US2449679A/en
Priority to GB32175/45A priority patent/GB604617A/en
Priority to FR938659D priority patent/FR938659A/fr
Application granted granted Critical
Publication of US2449679A publication Critical patent/US2449679A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01K1/16—Electric connection thereto

Definitions

  • the invention is here illustrated and explained as embodied in end supports which also serve as current supply connections, thoughit might also be applied to supports that sustain an intermediate portion of a filament, or do not carry current, or both.
  • the filament mount here shown is of a concentrated coil type; but the invention is not limited to any particular type of mount.
  • Fig. l is a side view of a biplane coiled filament mount, for an incandescent lamp, that convenlently embodies the invention, portions of the lamp bulb being also shown.
  • Fig. 2 is a partly sectional view, on a largerscale, illustrating the attachment and electrical connection of a current lead and support to a filament; and I Fig. 3 is a similar view illustrating a different form of construction.
  • the mount here illustrated is that of a projection lamp of moderately high wattage, comprising a filament. of tungsten wire coiled in a number of upright sections I that are interconnected by intermediate uncoiled U-portions or bights 2.
  • the coils I may be staggered so as to lie alternately in two parallel planes.
  • the supporting structure of the mount comprises leadwlres 3, 3 sealed through the pressed seal 6 of an ordinary stem flare portion 5 of the lamp envelope. These leads 3, 3 are shown as offset outward at 6, B, and then bent inward at l, 1 near their upper ends.
  • Long upright side sections 8, 8 of the leads 3, 3 may consist of refractory metal like molybdenum interposed between lengths of ordinary metal like nickel, butt-welded to the ends of the molybdenum.
  • the upper bar II is supported by wires I3 fused into its lower side near its ends and welded to the inbent upper lead portions 1, l, and the lower bar 12 is supported by bent wires i4 fused into its upper side near its ends and welded to the lower lead portions 6.
  • Bent spacing wires I5 fused into the lower side of the upper bar ii between hooks land wires l3 may be pro-- vided for engaging the lamp bulb and bracing the mount transversely therein.
  • each of these comprises a spud like member I6 of suitable size wire provided with a helical screw thread and having one end screwed into and completely through a helically coiled filament end portion II, which may be connected to the adjacent coiled section I by an uncoiled length l8.
  • the other end of the member i6 is shown welded to the portion I of the corresponding lead 3.
  • the coil I1 is not only in screw mesh with the threads of the member I6, but in definite frictional engagement with them.
  • the coil ll may be coiled to a size slightly smaller than that of the threads of member 18, so that the coil will elastically grip the member when the latter is screwed into the coil.
  • the frictional contact of the screw threads in the coil Il short-circuits all the coil turns, so that a definite length of filament exclusivepf the coils I l, I! is in circuit between the connectors i6, ii.
  • the lead portions 1, 1 may preferably be weldedto the lead portions 1, 1 after being screwed into the'filament coils l'l, H, which may conveniently be done before the filament is placed on the hooks 9, ill.
  • the screw thread on the member It consists of a coil of wire 19 tightly fitting around and irictionally gripping the mem-.
  • the wire 19 is shown finer than the filament wire, as well as finer than the member IS.
  • the wire l9 may either be wound on the member l8 under suitable molybdenum, including in the Fig. 1 type the winding I9 as well as the member l8. In both cases, the pitch of the screw threads of member l8 may be approximately the same as that of the coasting filament coil II. In manufacture, it is convenient and economical to screw thread long lengths of wire and cut them up into Fig. 3 type spuds it of suitable length; or to wind long lengths of unthreaded wire it with the wire l9,
  • An electric lamp comprising a mount including supporting structure and a coiled filament. and aspud tor tensioning coil convolutions of said filament attached to said supporting structure and provided with screw threads in screw mesh and frictional engagement with other coil convolutions of said filament, the said screw mesh trictional interengagement providing the sole electrical and mechanical connection of the spud to the filament.
  • a filament mount the combination with a support of a spud attached'at one end to said support and provided with screw threads on its other end, and a filament having a helically coiled portion in screw mesh and frictional engagement with the threads .on the said other end of said spud, the said screw mesh frictional interengagement of the said screw threads and helically coiled portion 01 the filament providing the sole electrical and mechanical connection of the spud to the filament.
  • a filament support comprising a mandrel member, a helical wire coil having convolutions fitted around and directly gripping said member, thus forming screw threads on said w 1,405.545

Landscapes

  • Wire Processing (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
US565825A 1944-11-30 1944-11-30 Lamp filament support and connection Expired - Lifetime US2449679A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE476889D BE476889A (enrdf_load_stackoverflow) 1944-11-30
US565825A US2449679A (en) 1944-11-30 1944-11-30 Lamp filament support and connection
GB32175/45A GB604617A (en) 1944-11-30 1945-11-28 Improvements in and relating to lamp filament supports
FR938659D FR938659A (fr) 1944-11-30 1946-10-18 Perfectionnements à la fabrication des supports de filaments de lampes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US565825A US2449679A (en) 1944-11-30 1944-11-30 Lamp filament support and connection

Publications (1)

Publication Number Publication Date
US2449679A true US2449679A (en) 1948-09-21

Family

ID=24260254

Family Applications (1)

Application Number Title Priority Date Filing Date
US565825A Expired - Lifetime US2449679A (en) 1944-11-30 1944-11-30 Lamp filament support and connection

Country Status (4)

Country Link
US (1) US2449679A (enrdf_load_stackoverflow)
BE (1) BE476889A (enrdf_load_stackoverflow)
FR (1) FR938659A (enrdf_load_stackoverflow)
GB (1) GB604617A (enrdf_load_stackoverflow)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2592823A (en) * 1948-07-06 1952-04-15 Riccomagno Guglielmo Electric incandescent lamp
US2633552A (en) * 1951-06-04 1953-03-31 Westinghouse Electric Corp Lamp, filament therefor and method
US2644102A (en) * 1950-08-10 1953-06-30 Gen Electric Incandescent lamp mount and manufacture thereof
US2687489A (en) * 1952-06-26 1954-08-24 Hanovia Chemical & Mfg Co Electrode
US2950413A (en) * 1959-03-31 1960-08-23 Gen Electric Filament connection for electric lamp or similar device
US2961568A (en) * 1957-11-14 1960-11-22 Gen Electric Filament joint for incandescent lamps
US3221202A (en) * 1962-02-28 1965-11-30 Thorn Electrical Ind Ltd Electric incandescent lamps
DE1213528B (de) * 1961-06-16 1966-03-31 Thorn Electrical Ind Ltd Elektrische Gluehlampe, insbesondere Projektionsgluehlampe
DE1229184B (de) * 1959-10-02 1966-11-24 Gen Electric Verfahren zur Herstellung einer Stuetze fuer Leuchtkoerper elektrischer Lampen und Gluehkoerper elektrischer Geraete
US3376460A (en) * 1965-09-20 1968-04-02 Sylvania Electric Prod Conical shaped filament support
US3416024A (en) * 1966-05-31 1968-12-10 Gen Electric Differential output incandescent lamp
US3440473A (en) * 1966-12-14 1969-04-22 Sylvania Electric Prod Lamp filament joint for incandescent lamps
DE2821317A1 (de) * 1977-05-24 1978-12-07 Philips Nv Elektrische halogengluehlampe
US5760543A (en) * 1995-07-28 1998-06-02 Patent-Treuhand-Gesellschaft Fur Elektrische Gluehlampen Mbh Electrical incandescent lamps having hook-shaped coil holder with constricted opening

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1406645A (en) * 1916-07-29 1922-02-14 Heany John Allen Incandescent electric lamp
US1740391A (en) * 1927-12-14 1929-12-17 Gen Electric Incandescent-lamp mount
US2134574A (en) * 1937-08-24 1938-10-25 Gen Electric Electric incandescent lamp
US2140977A (en) * 1937-07-16 1938-12-20 Westinghouse Electric & Mfg Co Incandescent lamp
US2404992A (en) * 1946-07-30 Lamp filament connection

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2404992A (en) * 1946-07-30 Lamp filament connection
US1406645A (en) * 1916-07-29 1922-02-14 Heany John Allen Incandescent electric lamp
US1740391A (en) * 1927-12-14 1929-12-17 Gen Electric Incandescent-lamp mount
US2140977A (en) * 1937-07-16 1938-12-20 Westinghouse Electric & Mfg Co Incandescent lamp
US2134574A (en) * 1937-08-24 1938-10-25 Gen Electric Electric incandescent lamp

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2592823A (en) * 1948-07-06 1952-04-15 Riccomagno Guglielmo Electric incandescent lamp
US2644102A (en) * 1950-08-10 1953-06-30 Gen Electric Incandescent lamp mount and manufacture thereof
US2633552A (en) * 1951-06-04 1953-03-31 Westinghouse Electric Corp Lamp, filament therefor and method
US2687489A (en) * 1952-06-26 1954-08-24 Hanovia Chemical & Mfg Co Electrode
US2961568A (en) * 1957-11-14 1960-11-22 Gen Electric Filament joint for incandescent lamps
US2950413A (en) * 1959-03-31 1960-08-23 Gen Electric Filament connection for electric lamp or similar device
DE1229184B (de) * 1959-10-02 1966-11-24 Gen Electric Verfahren zur Herstellung einer Stuetze fuer Leuchtkoerper elektrischer Lampen und Gluehkoerper elektrischer Geraete
DE1213528B (de) * 1961-06-16 1966-03-31 Thorn Electrical Ind Ltd Elektrische Gluehlampe, insbesondere Projektionsgluehlampe
US3221202A (en) * 1962-02-28 1965-11-30 Thorn Electrical Ind Ltd Electric incandescent lamps
US3376460A (en) * 1965-09-20 1968-04-02 Sylvania Electric Prod Conical shaped filament support
US3416024A (en) * 1966-05-31 1968-12-10 Gen Electric Differential output incandescent lamp
US3440473A (en) * 1966-12-14 1969-04-22 Sylvania Electric Prod Lamp filament joint for incandescent lamps
DE2821317A1 (de) * 1977-05-24 1978-12-07 Philips Nv Elektrische halogengluehlampe
US5760543A (en) * 1995-07-28 1998-06-02 Patent-Treuhand-Gesellschaft Fur Elektrische Gluehlampen Mbh Electrical incandescent lamps having hook-shaped coil holder with constricted opening

Also Published As

Publication number Publication date
GB604617A (en) 1948-07-07
FR938659A (fr) 1948-10-21
BE476889A (enrdf_load_stackoverflow)

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