US2126155A - Incandescent electric lamp - Google Patents

Incandescent electric lamp Download PDF

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Publication number
US2126155A
US2126155A US174223A US17422337A US2126155A US 2126155 A US2126155 A US 2126155A US 174223 A US174223 A US 174223A US 17422337 A US17422337 A US 17422337A US 2126155 A US2126155 A US 2126155A
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United States
Prior art keywords
filament
coiled
wires
hollow
helix
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Expired - Lifetime
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US174223A
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English (en)
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Alexandre Van Dyck
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Individual
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/02—Incandescent bodies
    • H01K1/14—Incandescent bodies characterised by the shape

Definitions

  • FIG-2 FIG-3 Aug. 9, 1938.
  • 'A VAN DYcK IIJCANDESCEN'I ELECTRIC LAMP tFiled NOV. 12 1937 Patented Aug. 9, 1938 UNITED STATES ICANDESCENT ELECTRIC LAMP Alexandre Van Dyck, Brussels, Belgium Application November 12, 1937, serial No. 174,223
  • This invention relates .to incandescent electric lamps and the like, and concerns in particular the construction yof their illuminantv4 bodies or filaments. y
  • the invention has for its main object to provide a novel method of forming metallic illuminant bodies of refractory materials for incandescent electric lamps and the like, affording a luminous eiliciency at least equal to that of l illuminant bodies constituted by single or double coiling of the usual filaments, while avoiding the disadvantages of these last illuminant bodies;
  • the illuminant bodies made according to the invention are characterized in that they are oblll tained by means of filaments constituted with line multiple wires, made of refractory materials, coiled, woven,y plaited, superposed or assembled by any convenient means around Ia. mandrel of suitable cross section (or an imaginary core) the mandrel being for example and preferably cylindrical; these filaments 'are presented therefore in the form of a hollow wire composed of multiple elements.
  • the hollow filaments constituting the invention When coiled into a single helix, the hollow filaments constituting the invention form an apparently thick body of the dimensions customary in the art, and having a luminous efficiency at least equallto that of coiled-coil filaments.
  • 'I'he hollow filaments made according to the invention allow of obtaining very easily any desired thickness of wall.
  • 'I'hese vfilaments approximate therefore homogeneous hollow fila- Vments, made in one piece, the manufacture-of which would present insurmountable difficulties by reason of the nature of the material employed.
  • a is the mandrel, which supports four lengths of wire-, numbered from 1 to 4, as con- 5 of helices crossing one another.
  • Figs. 2 and 3 represent respectively in elevation and in plan a lament composed of multiple lengths of Wire wound in multiple helices opposed so as to form a plaited sheath around the manl drel al.
  • Themanufacture of the hollow filaments according to theV invention can beeifectedupon a mandrel of suitable shape, for example cylindrical, which will b'e either removed after completion of the hollow filament or else maintained in 30 this latter.
  • a mandrel made of materials known in the lamp industry and adaptedto be eliminated', chemically or otherwise, leaving' the material of the illuminant body unattacked, ⁇ such as wires of L35 brass, copper, steel, or even refractory metals such as molybdenum.
  • the fine wires or component elements of 4the hollow filaments can be of any cross-section whatever, circular, oval, rectangular or other.
  • the hollow lament made as explained above ⁇ can be coiled to shape, retaining the mandrel which has served for making it, upon a second mandrel of suitable cross-section (or around an imaginarycore) which may have the same properties as thef o0 first man drel.
  • these two mandrels (or only one of the two) will be eliminated .in the manner explained1 above or maintained in place.
  • Fig. 4 of the accompanying drawing shows dla- 55 grammatically and by way of example a hollow filament, made according to the invention, and coiled upon a mandrelb, a being the mandrel which has served for the formation of the hollow body or wire proper.
  • the vhelical coillng of the hollow filament can be effected upon the machines currently in use for the manufacture of the second helix of the known coiled-coil fllaments, but with infinitely greater facility, having regard to the firmer and more homogeneous nature of the body coiled.
  • the hollow illuminant filaments intended to be coiled like helices
  • account may be taken of the stresses which arise during this coiling, by means of a suitable arrangement of the component elements.
  • provision may be made for a suitable distribution of the constituent elements of the hollow filament in order to obtain such distribution as desired of the radiation in the helices formed; it is clearly possible in this way to increase further the specific efflciency as well as the length of life of the illuminant bodies.
  • the two cases refer to an illuminant body made of tungsten for a gas-filled lamp of watts for a voltage of volts, the same weight of tungsten having been utilized for both.
  • total emission surface there is to be understood the enveloping surface of the coiled coil or double helical lament; this imaginary surface constitutes in accordance with the recognized theory of luminous radiation the true emission surface of the filament.
  • the total emission surface in the lamp with a hollow filament made according to the invention and Wound as a helix is about 21/2 times greater than in the case of the single filament coiled as a double helix.
  • the mounting of the illuminant bodies formed with hollow filaments according to the inven' tion can be effected just as in the case of an ordinary filament of the plain coiled or coiledcoil type, that is to say by pinching to the two electrodes and arranged upon suitable supports.
  • filament consisting of an elongated hollow body having its surface formed of refractory metal wires, said body being coiled into a compact shape to constitute the filament.
  • a filament consisting of an elongated hollow body having its surface formed of refractory metal wires plaited together, said body being coiled into a compact shape to constitute the filament.
  • a filament consisting of an elongated'hollow body having its surface formed of refractory metal Wires, said body being coiled into helical form to constitute the filament.
  • filament composed of refractory metal wires arranged as coaxial helices of long pitch, said wires being plaited together to form a sleeve, and said sleeve being coiled as a helix of short pitch to constitute the filament.
  • a filament composed of refractory metal wires arranged as coaxial helices of long pitch, said wires being Woven together to form a sleeve, and said sleeve being coiled as a helix of short pitch to constitute'the filament.
  • a fllament composed of refractory metal wires, a group of said wires being arranged as parallel right-handed helices of long pitch, another group of said wires being arranged as parallel lefthanded helices of long pitch, the Wires of said groups being intertwined to form a plaited tubular sleeve, and said sleeve being coiled as a helix of short pitch to constitute the filament.
  • An incandescent electric ⁇ lamp ilament consisting of a plurality of relatively short and fine wires of refractory metal, said wires being extending in helices of long pitch, and said sleeve being coiled as a helix of short pitch to constitute the filament.
  • An incandescent electric lamp filament consisting of a plurality of relatively short and fine Wires of refractory metal, said wires being woven together to form a sleeve, and said sleeve being coiled as a helix of short pitch to constitute the filament.
  • An incandescent electric lamp filament consisting of a plurality of relatively short'and iine wires of refractory metal, said Wires being plaited 4,together around a mandrel to form a sleeve with the wires extending in helices of long electric lampllament,.which comprisesthe steps of drawing fine wire in refractory metal, cutting lengths of said wire. assembling a plurality of lengths ofv said wire aroundamandrel,assembling said lengths to form a tubular sheath, removing said sheath from the mandrel, and ceiling said sheath around a mandrel to constitute a closely coiled hollow body of elongated form having its Walls formed of said refractory metal wires.
  • a 1D0-watt iilament for a 110 volt lamp consisting of approximately 30 tungsten metal wires plaited into the shape of a sleeve, the die and said sleeve being then closely coiled to form a helix of short pitch, the diameter of said-helix being approximately 1.082 millimeters, and the length of said helix being,l approximately 51 millimeters.

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  • Resistance Heating (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
US174223A 1936-11-18 1937-11-12 Incandescent electric lamp Expired - Lifetime US2126155A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE418466A BE418466A (fr) 1936-11-18 1936-11-18 Perfectionnements aux lampes électriques à incandescence et analogues
BE424340A BE424340A (fr) 1936-11-18 1937-10-29 Perfectionnements aux lampes électriques à incandescence et analogues

Publications (1)

Publication Number Publication Date
US2126155A true US2126155A (en) 1938-08-09

Family

ID=82068774

Family Applications (1)

Application Number Title Priority Date Filing Date
US174223A Expired - Lifetime US2126155A (en) 1936-11-18 1937-11-12 Incandescent electric lamp

Country Status (7)

Country Link
US (1) US2126155A (fr)
BE (2) BE418466A (fr)
CH (1) CH205672A (fr)
DE (1) DE744148C (fr)
FR (1) FR829413A (fr)
GB (1) GB498092A (fr)
NL (1) NL51572C (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3073986A (en) * 1960-04-20 1963-01-15 Gen Electric Electric incandescent lamp
US3356883A (en) * 1964-12-27 1967-12-05 Sylvania Electric Prod Florescent lamp having electrodes comprising a tubular braid and an additional wire coiled about the same space
US3423622A (en) * 1966-07-05 1969-01-21 Sylvania Electric Prod Electrical filament support device
US4283653A (en) * 1979-09-17 1981-08-11 Duro-Test Corporation High emissivity filament for energy conserving incandescent lamps with infrared radiation returning envelopes
WO2002071444A1 (fr) * 2001-03-06 2002-09-12 Koninklijke Philips Electronics N.V. Ampoule electrique
US6737616B1 (en) 2003-04-02 2004-05-18 Tutco, Inc. Open coil electric resistance heater using twisted resistance wires and methods of making

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE960369C (de) * 1953-06-19 1957-03-21 Daimler Benz Ag Elektrische Gluehbirne fuer Blinkleuchten

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3073986A (en) * 1960-04-20 1963-01-15 Gen Electric Electric incandescent lamp
US3356883A (en) * 1964-12-27 1967-12-05 Sylvania Electric Prod Florescent lamp having electrodes comprising a tubular braid and an additional wire coiled about the same space
US3423622A (en) * 1966-07-05 1969-01-21 Sylvania Electric Prod Electrical filament support device
US4283653A (en) * 1979-09-17 1981-08-11 Duro-Test Corporation High emissivity filament for energy conserving incandescent lamps with infrared radiation returning envelopes
WO2002071444A1 (fr) * 2001-03-06 2002-09-12 Koninklijke Philips Electronics N.V. Ampoule electrique
US20030122464A1 (en) * 2001-03-06 2003-07-03 Akira Kurosawa Electric Lamp
US6803706B2 (en) 2001-03-06 2004-10-12 Koninklijke Philips Electronics N.V. Lamp with double layer coiled-coil filament
US6737616B1 (en) 2003-04-02 2004-05-18 Tutco, Inc. Open coil electric resistance heater using twisted resistance wires and methods of making

Also Published As

Publication number Publication date
BE418466A (fr) 1936-12-31
CH205672A (fr) 1939-06-30
GB498092A (en) 1939-01-03
BE424340A (fr) 1937-10-29
DE744148C (de) 1944-01-10
FR829413A (fr) 1938-06-27
NL51572C (nl) 1941-11-16

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