US3270238A - Electric lamp filament support - Google Patents

Electric lamp filament support Download PDF

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Publication number
US3270238A
US3270238A US257027A US25702763A US3270238A US 3270238 A US3270238 A US 3270238A US 257027 A US257027 A US 257027A US 25702763 A US25702763 A US 25702763A US 3270238 A US3270238 A US 3270238A
Authority
US
United States
Prior art keywords
filament
envelope
lead
pinch seal
conductor
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
US257027A
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English (en)
Inventor
Fred A Mosby
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
Priority to US257027A priority Critical patent/US3270238A/en
Priority to GB3152/64A priority patent/GB1043086A/en
Priority to ES0295916A priority patent/ES295916A1/es
Priority to DEG39785A priority patent/DE1299359B/de
Priority to DEG29463U priority patent/DE1986074U/de
Priority to FR962811A priority patent/FR1381868A/fr
Application granted granted Critical
Publication of US3270238A publication Critical patent/US3270238A/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/18—Mountings or supports for the incandescent body
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/18—Mountings or supports for the incandescent body
    • H01K1/24—Mounts for lamps with connections at opposite ends, e.g. for tubular lamp
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/38—Seals for leading-in conductors

Definitions

  • a support in the form of a U-shaped, or hairpin shaped, wire having the ends of its legs embedded in a pinch seal at the end of the envelope and having a loop in its bend encircling the filaments at a point intermediate its length.
  • a generally U-shaped wire support having its legs embedded in the pinch seal in spaced relation to the lead-in conductors and having at its bend or bight portion a loop or hook supporting the filament at a location intermediate its ends.
  • FIG. 1 is a side view of a double ended lamp provided with a support member in accordance with the invention
  • FIG. 2 is a vertical elevation, in section, illustrating a preferred method of assembly of the lamp envelope and filament
  • FIG. 3 is a side view of a lamp embodying two support members in accordance with the invention.
  • FIG. 4 is an elevation of a single ended lamp provided with a support member in accordance with the invention.
  • FIG. 5 is a cross section through the pinch seal along the line 55 in FIG. 4.
  • the lamp comprises an elongated tubular envelope 1 of vitreous material such as glass or quartz having a flattened pinch seal 2 at each end thereof which may be pressed to an I-shaped cross section.
  • a filament 3 preferably a coil or coiled-coil of tungsten wire, extends axially of the envelope 1 and is 3,273,238 Patented August 30, 1966 connected at its ends to lead-in conductors 4 which extend through and are hermetically sealed in the pinch seals 2.
  • the leads 4 preferably consist of molybdenum wires having extremely thin, foliated portions 5.
  • Straightened end or leg portions of the filament are preferably attached to the respective foliated portions 5 within the pinch seal 2, preferably by welding and with a tab of platinum interposed therebetween.
  • the envelope preferably contains an inert gas filling and may also contain a reactive atmosphere such as a halogen, particularly iodine as disclosed and claimed in Patent 2,883,571-Fridrich et al.
  • the filament 3 is supported at a point intermediate its length by a U-shaped wire member 6, preferably of tungsten, having the ends of its legs embedded in one of the pinch seal 2 at opposite sides of the lead wire 4, and having a loop 7 at the center of its bend encircling the filament 3 at its midpoint.
  • a U-shaped wire member 6 preferably of tungsten, having the ends of its legs embedded in one of the pinch seal 2 at opposite sides of the lead wire 4, and having a loop 7 at the center of its bend encircling the filament 3 at its midpoint.
  • the legs of the support member preferably extend closely adjacent opposite sides of the inner wall of the envelope 1 and are additionally supported thereby in cases of severe vibration.
  • the legs of the support member 6 are spread apart sufficiently to frictionally engage opposite sides of the inner surface of the wall of the envelope 1.
  • the outer end portions 8 of the legs of the support are bent slightly with respect to the remainder of the legs so as to engage the envelope wall for a substantial length, say about five to ten millimeters, thereby avoiding tilting of the support in the envelope such as might occur if only the very tips of the legs were to engage the envelope wall.
  • the assembly of filament 3 and lead wires 4 is threaded into the envelope from the top thereof and through the loop 7 in support 6.
  • the filament assembly is supported by any suitable means engaging the upper lead wire 4 and resting on the upper end of envelope 1. Then, in known manner, the filament 3 is stretched slightly by pulling down on the lower lead wire 4, and the lower end of the envelope 1 is softened by heating and then compressed by a pair of jaws to form a pinch seal. The other end of the envelope 1 is then heated and pinch sealed, after which the envelope is evacuated and filled with the desired atmosphere through an exhaust tube which is subsequently tipped off close to the envelope as shown at 9.
  • the support 6 may first be attached to the filament 3 by clamping or closing the loop 7 upon the filament 3, after which the assembly of filament 3, lead wires 4 and support 6 is threaded into the envelope.
  • FIG. 3 there is illustrated a lamp which is somewhat longer than that shown in FIG. 1 and wherein a support member 6 is provided at each end of the envelope 1 so that the longer filament 3 is supported at spaced points by the loops 7 of the respective support 6.
  • the single ended form of lamp shown in FIG. 4 comprises an envelope 10 which may be formed from quartz tubing and which has a pinch seal 11 at one end in which are hermetically sealed the foliated portions 12 of a pair of molybdenum lead-in wires 13.
  • a helically coiled tungsten wire filament 14 is arranged in V-shape with its ends connected to the foil portions 12 of respective lead wires 13, the said end portions of the filament coil each preferably containing an insert or mandrel wire 15.
  • the filament 14 is supported at its apex by a hook or loop 16 in the bend or bight portion of a generally U-shaped tungsten support 3 wire 17 having the ends of its legs embedded in the pinch seal 11.
  • the envelope 10 may be filled with a gas such as argon and a small quantity of iodine which functions as a regenerative getter to return'to the filament 14 tungsten vaporized therefrom, whereby to maintain the envelope clean and free from blackening.
  • a gas such as argon and a small quantity of iodine which functions as a regenerative getter to return'to the filament 14 tungsten vaporized therefrom, whereby to maintain the envelope clean and free from blackening.
  • the evacuation and gas filling is performed through the end of the length of tubing of Which the envelope 1 is constituted, the said tubing being necked in and subsequently tipped off at 18.
  • the support member 17 may be supported Within the said quartz tubing by a hook on the end of a length of wire exending upwardly through the quartz tubing and which is removed after the pinch 11 has been formed.
  • An electric incandescent lamp comprising an envelope of vitreous material having a pinch seal at one end, a lead-in conductor extending through said pinch seal, a filament in said envelope connected to said conductor, and a support member for said filament separate and distinct from said lead-in conductor and comprising a generally U-shaped Wire having end portions of its legs embedded in and terminating within said pinch seal in spaced relation to and electrically insulated from said conductor, the bend of said U-shaped Wire having therein a loop supporting the filament at a location spaced from its connection to said conductor.
  • An electric incandescent lamp comprising an elongated envelope of vitreous material having pinch seals at its ends, a lead-in conductor extending through each said pinch seal, a filament extending longitudinally of said envelope and connected at its ends to respective said lead-in conductors, and a support member for said filament comprising a generally U-shaped wire having end portions of its legs embedded in one of said pinch seals at opposite sides of the associated lead-in conductor, said legs extending longitudinally of and at opposite sides of said filament, the bend of said U-shaped wire having therein a loop encircling the said filament at a location intermediate its length.
  • a lamp as set forth in claim 2 wherein a said support member is provided at each end of said envelope with the end portions of the legs of said member embedded in respective said pinch seals and the loops in the bends of said members encircling the filament at spaced locations intermediate its ends.
  • An electric incandescent lamp comprising an elongated tubular envelope of vitreous material having pinch seals at its ends, a lead-in conductor extending through each said pinch seal, a filament extending longitudinally of said envelope and connected at its ends to respective said lead-in conductors, and a support member for said filament comprising a generally U-shaped Wire having end portions of its legs embedded in one of said pinch seals at opposite sides of the associated lead-in conductor, said legs extending longitudinally adjacent opposite sides of the inner wall of said envelope, the bend of said U-shaped Wire having therein a loop encircling the said filament at a location intermediate its length.
  • An electric incandescent lamp comprising an envelope of vitreous material having a pinch seal at one end, a pair of lead-in conductors extending through said pinch seal in side-by-side relation, a filament in said envelope connected at its ends to respective said conductors, and a support member for said filament separate and distinct from said lead-in conductors and comprising a generally U-shaped wire having end portions of its legs embedded in and terminating within said pinch seal in spaced relation to and electrically insulated from said conductors, the bend of said U-shaped wire having therein a loop supporting the filament at a location intermediate its ends.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Resistance Heating (AREA)
US257027A 1963-02-07 1963-02-07 Electric lamp filament support Expired - Lifetime US3270238A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US257027A US3270238A (en) 1963-02-07 1963-02-07 Electric lamp filament support
GB3152/64A GB1043086A (en) 1963-02-07 1964-01-24 Improvements in electric lamp filament support
ES0295916A ES295916A1 (es) 1963-02-07 1964-01-31 Mejoras introducidas en la fabricaciën de lamparas incandescentes
DEG39785A DE1299359B (de) 1963-02-07 1964-02-06 Elektrische Gluehlampe mit einem durch eine Quetschung verschlossenen Glasgefaess
DEG29463U DE1986074U (de) 1963-02-07 1964-02-06 Elektrische gluehlampe mit einem mittels quetschens verschlossenen gefaess.
FR962811A FR1381868A (fr) 1963-02-07 1964-02-06 Perfectionnements aux lampes électriques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US257027A US3270238A (en) 1963-02-07 1963-02-07 Electric lamp filament support

Publications (1)

Publication Number Publication Date
US3270238A true US3270238A (en) 1966-08-30

Family

ID=22974599

Family Applications (1)

Application Number Title Priority Date Filing Date
US257027A Expired - Lifetime US3270238A (en) 1963-02-07 1963-02-07 Electric lamp filament support

Country Status (4)

Country Link
US (1) US3270238A (de)
DE (2) DE1299359B (de)
ES (1) ES295916A1 (de)
GB (1) GB1043086A (de)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3335312A (en) * 1965-01-25 1967-08-08 Gen Electric Filament support for tubular incandescent lamps
US3355619A (en) * 1964-09-11 1967-11-28 Sylvania Electric Prod Incandescent lamp
US3390299A (en) * 1965-11-08 1968-06-25 Gen Electric Filament supports for tubular incandescent lamps
US3403280A (en) * 1966-03-04 1968-09-24 Gen Electric Single-ended electric incandescent lamp filament support
US3441770A (en) * 1967-04-10 1969-04-29 Gen Electric Electric incandescent lamp with shock and vibration resistant filament support structure
US3441776A (en) * 1967-05-12 1969-04-29 Gen Electric Filament support for incandescent electric lamps
US3441772A (en) * 1967-05-12 1969-04-29 Gen Electric Filament mount structure for electric lamps and manufacture thereof
US3448321A (en) * 1967-10-02 1969-06-03 Gen Electric Electric incandescent lamp and method of manufacture
US3470410A (en) * 1967-01-16 1969-09-30 Gen Electric Bromine regenerative cycle incandescent lamps with protective overwind coils on coiled filament legs
US3502932A (en) * 1967-10-02 1970-03-24 Gen Electric Incandescent lamp and method of manufacture
US3736455A (en) * 1970-08-27 1973-05-29 Philips Corp Support for the filament body of a tubular lamp
US3863314A (en) * 1973-06-07 1975-02-04 Gte Sylvania Inc Method of manufacturing miniature incandescent lamps
US4208606A (en) * 1979-01-10 1980-06-17 Westinghouse Electric Corp. Filament-support means for a tubular incandescent lamp
US4208608A (en) * 1978-03-13 1980-06-17 General Electric Company Lamp mount structure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010029068A1 (de) * 2010-05-18 2011-11-24 Osram Gesellschaft mit beschränkter Haftung Verfahren zum Herstellen einer Hochspannungsschaltfunkenstrecke

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1600563A (en) * 1924-07-30 1926-09-21 Charles A Proctor Incandescent electric lamp

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1687496A (en) * 1926-12-07 1928-10-16 Gen Electric Incandescent lamp

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1600563A (en) * 1924-07-30 1926-09-21 Charles A Proctor Incandescent electric lamp

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3355619A (en) * 1964-09-11 1967-11-28 Sylvania Electric Prod Incandescent lamp
US3335312A (en) * 1965-01-25 1967-08-08 Gen Electric Filament support for tubular incandescent lamps
US3390299A (en) * 1965-11-08 1968-06-25 Gen Electric Filament supports for tubular incandescent lamps
US3403280A (en) * 1966-03-04 1968-09-24 Gen Electric Single-ended electric incandescent lamp filament support
US3470410A (en) * 1967-01-16 1969-09-30 Gen Electric Bromine regenerative cycle incandescent lamps with protective overwind coils on coiled filament legs
US3441770A (en) * 1967-04-10 1969-04-29 Gen Electric Electric incandescent lamp with shock and vibration resistant filament support structure
US3441772A (en) * 1967-05-12 1969-04-29 Gen Electric Filament mount structure for electric lamps and manufacture thereof
US3441776A (en) * 1967-05-12 1969-04-29 Gen Electric Filament support for incandescent electric lamps
US3448321A (en) * 1967-10-02 1969-06-03 Gen Electric Electric incandescent lamp and method of manufacture
US3502932A (en) * 1967-10-02 1970-03-24 Gen Electric Incandescent lamp and method of manufacture
US3736455A (en) * 1970-08-27 1973-05-29 Philips Corp Support for the filament body of a tubular lamp
US3863314A (en) * 1973-06-07 1975-02-04 Gte Sylvania Inc Method of manufacturing miniature incandescent lamps
US4208608A (en) * 1978-03-13 1980-06-17 General Electric Company Lamp mount structure
US4208606A (en) * 1979-01-10 1980-06-17 Westinghouse Electric Corp. Filament-support means for a tubular incandescent lamp

Also Published As

Publication number Publication date
DE1299359B (de) 1969-07-17
GB1043086A (en) 1966-09-21
ES295916A1 (es) 1964-05-01
DE1986074U (de) 1968-05-30

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