US3227909A - Incandescent electric lamp - Google Patents

Incandescent electric lamp Download PDF

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Publication number
US3227909A
US3227909A US334357A US33435763A US3227909A US 3227909 A US3227909 A US 3227909A US 334357 A US334357 A US 334357A US 33435763 A US33435763 A US 33435763A US 3227909 A US3227909 A US 3227909A
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US
United States
Prior art keywords
bulb
filament
lamp
axis
flat
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
US334357A
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English (en)
Inventor
Schilling Werner
Sanden Jurgen
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Priority to DE1964V0026922 priority Critical patent/DE1290473B/de
Application granted granted Critical
Publication of US3227909A publication Critical patent/US3227909A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/42—Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/50—Selection of substances for gas fillings; Specified pressure thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K5/00—Lamps for general lighting
    • H01K5/02—Lamps for general lighting with connections made at opposite ends, e.g. tubular lamp with axially arranged filament
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Definitions

  • the present invention relates to a gas-filled low voltage lamp by which is meant a lamp rated at a voltage up to sixty volts such as generally operated from batteries. Lamps of this type are used with vehicles of all kinds, and the lamps herein described relate to those intended particularly for utilization as vehicle headlights.
  • the fundamental object of the present invention is to provide a practical lamp adapted to utilize the benefits of iodine additive to the vapor filling therein.
  • the invention proposes a lamp capable of high intensity concentrated light output with a low voltage input.
  • the invention contemplates a lamp wherein the bulb or envelope can be made of a single material throughout, unaffected by the iodine additive to the gaseous filling.
  • the invention provides an envelope providing relatively close proximity of the filament to the envelope wall.
  • Another object of the invention is to establish a rela tionship between the filament and the area for concentrated light projection from the envelope, to produce maximum emission of light from the filament and through 3,227,909 Patented Jan. 4, 1966 said area, and avoid undue refractions and disturbing reflections.
  • the invention provides a filament of planar characteristic and an envelope with a light-projection area substantially in parallelism to the planar facet of the filament.
  • FIGURE 1 is a longitudinal section of a lamp disclosing one form of the invention
  • FIGURE 2 is a front end view of the lamp of FIG. 1;
  • FIGURE 3 is a longitudinal section of a lamp illustrative of a second form of the invention.
  • FIGURE 4 is a front view of the lamp of FIG. 3;
  • FIGURE 5 is a longitudinal section of a third form of the invention.
  • FIGURE 6 is a front view of the lamp of FIG. 5;
  • FIGURE 7 is a cross-section of a lamp envelope and filament of a fourth form of the invention, longitudinal section whereof may be as shown by the form of FIG. 5.
  • a hollow bulb 1 is shown, the same being made from a transparent or other light-transmitting high-melting material, such as quartz or hard glass.
  • the bulb provides a flat area 2 through which concentration of light is to pass in use of the lamp, in a direction perpendicular to that flat area. This will provide a concentrated beam completely avoiding refraction in its passage through the said area. Except for this flat area, the interior of the bulb is approximately spherical.
  • a filament of tungsten or other suitable material is a longitudinally straight fiat core wire coil, thereby having a planar characteristic, so that when viewed in plan it has an extensive planar facet, but when viewed at a position of rotation from plan view, it
  • the planar facet of the filament 3 is situated in the bulb 1 parallel to the flat area 2 at the front of the bulb, in consequence of which the light rays from the filament pass to and through said fiat area in a direction perpendicular thereto without refraction. Such reflection as may take place from said fiat area, returns into the filament itself.
  • the flat facet of the filament is in a plane parallel to the flat area 2 of the bulb 1, there is a constancy of distance of all points of the filament from the said fiat area of the bulb.
  • the ends of the filament are substantially the same distance from the proximate spherical portion of the bulb wall opposite to said ends as the distance from the filament to the flat area of the bulb.
  • the filament 3 is supported at its ends by tungsten inlead wires 4 within the bulb and located perpendicular to the planar facet of the filament, being welded or otherwise unified with intermediate in-lead sections 5 interposed between the respective inner in-leads 4 and respective outer in-leads 6 alined therewith.
  • the inner in-leads 4 and the outer in-leads 6 are relatively rigid, whereas the intermediate section 5 may be more, flexible to accommodate it to sealing-in operation and to expansion and contraction of the lamp material. It is chosen from the group of materials having a coefficient of expansion of the bulb material to maintain a positive seal, molybdenum foil being an acceptable example.
  • the outer in-lead 6 correspondingly may be molybdenum wire.
  • the said intermediate section 5 and adjacent ends welded thereto of the inner and outer in-leads 4 and 6 are embedded and sealed in the press 7 of the lamp in accordance with usual lamp manufacturing operations.
  • An appropriate exhaust channel 8 is provided longitudinally of the press 7, by which exhaust and ultimate charging with gas and the iodine is effected.
  • acceptable gas filling with which iodine may be used may be selected from the group comprising nitrogen, argon, krypton, and xenon. Cold filling pressure satisfactorily employed for introduction of any of these gases is preferably between one and twenty atmospheres.
  • lamps the light from which may be projected both at the front and back thereof are illustrated in the modifications of FIGS. 3-7.
  • these lamps have two presses projecting at diametrically opposite sides of the hollow body portion and of less thickness than the distance between the flattened areas.
  • the hollow envelope or bulb 11 has its front and back flattened to provide areas 12, 12 parallel to each other through which light may be projected both forwardly and rearwardly of the lamp in a direction perpendicular to said areas.
  • the hollow body except for flattening of the two opposite areas, has an internal spherical configuration.
  • the ends of said filament are welded, as before, to contiguous ends projecting into the bulb of inner in-leads 14 of tungsten wire, but in this instance said in-leads and the filament are alined.
  • An intermediate i'n-lead section 15 of molybdenum foil isinterposed, as in the previously described construction, between said inner in-lead 14 and an alined outer in-lead 16 of molybdenum wire and unified with both, as by being Welded thereto.
  • the foil is thin and flat, and its flat face is in the same plane as the flat facet of the filament as may be seen in FIG. 4. The thin edges of the foil and filament appear in FIG. 3.
  • diametrically opposite presses 17 project from the sides of the bulbous body of the lamp. These presses are flattened in the same direction as the bulbous body is flattened, and to a less thickness so as to lie inbetween planes of said flattened areas 12, 12.
  • a tubulation is originally present for purpose of evacuation of the envelope and recharging it with one of the aforementioned gases and with the iodine, after which the tubulation is tipped off as shown at 18 in FIG. 4.
  • the lamp shown in FIGS. 5, 6 and 7 consists of an initially cylindrical bulb 21 flattened on two diametrically opposite sides chordally of the cylinder to form the front and back areas 22 in substantially parallel planes.
  • the filament is rated at eight volts and fifty-five watts.
  • the current in-leads consisting of three sections 24, 25, 26, conforming to in-leads described in connection with the preceeding forms of the invention, are sealed in two outer stem presses 27 the flat sides of which lie between the planes of the chordal flat areas 22 of the bulb.
  • the planes of the flattened areas of the bulb, of the flat areas of the stem presses, of the flat facet of the filament, and the flat molybdenum foil section of the in-leads are all in substantial parallelism.
  • Light rays from the flat facet of the filament pass through the flat areas in a direction perpendicular to both the front and back flattened areas 22 of the bulb.
  • the bulb as manufactured has a length of about 35 mm., greatest diameter of 10 mm., and smallest diameter between the flattened areas of 5.5 mm.
  • Tubulat-ion seal-off or tip 28 completes the lamp after the gas filling, with iodine additive are introduced at the cold filling pressure previously mentioned herein.
  • Partial flattening of circular cylindric bulbs may be employed with a degree of accomplishment of the objects of the invention, and so made the bulb then will have an oval cross-section as shown in FIG. 7.
  • This cross section shows also that the distance between the inner bulb wall and the flat core coil is quite similar in all directions and is very small.
  • lamps according to the disclosed invention with straight flat core coil filaments supported only at their ends by the two in-leads, and at approximately constant spacing from the bulb wall, may be made for inputs up to about 1000 watts. While lamps of this invention have been described as having utility in the automotive trade, it is to be understood that use is not restricted thereto.
  • An electric incandescent lamp having a hollow bulb of high-melting material and having a pair of in-leads sealed in said bulb, a tungsten filament in the form of a coil longitudinally of an axis, said coil comprised of substantially flat convolutions presenting as a group a filament with broad planar facets and narrow edges longitudinally of said axis and with said broad facets and narrow edges spaced from said axis, said filament being supported entirely by said pair of in-leads, said bulb having a gas filling with additive of iodine thereto, and said bulb having a flattened area a midportion whereof is directly opposite to and in a plane in approximate paral lelism to a said planar facet of the filament, thereby obtaining a broad source of light projection directly from said planar facet perpendicular to and through said flattened area and yet avoiding refraction and reflection of light from the filament in transition to and through said flattened area of the bulb.
  • an incandescent lamp in accordance with claim 1 wherein the bulb is inpart sphere shaped with said flattened area on one side and with the diameter of said area exceeding the length and breadth of said planar facets of the filament.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Resistance Heating (AREA)
US334357A 1963-01-03 1963-12-30 Incandescent electric lamp Expired - Lifetime US3227909A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1964V0026922 DE1290473B (de) 1963-12-30 1964-10-07 Vorrichtung zum Herstellen, Fuellen und Verschliessen von Verpackungen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP30894A DE1183596B (de) 1963-01-03 1963-01-03 Gasgefuellte elektrische Niedervolt-Gluehlampe
DEP0036669 1965-04-29

Publications (1)

Publication Number Publication Date
US3227909A true US3227909A (en) 1966-01-04

Family

ID=25990194

Family Applications (1)

Application Number Title Priority Date Filing Date
US334357A Expired - Lifetime US3227909A (en) 1963-01-03 1963-12-30 Incandescent electric lamp

Country Status (4)

Country Link
US (1) US3227909A (fr)
DE (2) DE1183596B (fr)
FR (1) FR1378621A (fr)
GB (2) GB1026445A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3351802A (en) * 1964-06-12 1967-11-07 Sylvania Electric Prod Single ended, quartz type incandescent lamp
US3445720A (en) * 1967-05-31 1969-05-20 John J Horan Monolithic electric lamps,mountable on cords and elsewhere
US4857804A (en) * 1982-04-28 1989-08-15 Gte Products Corporation Tungsten-halogen lamp with metal additive
WO2007063059A1 (fr) * 2005-11-29 2007-06-07 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampe electrique a ampoule comportant au moins un pincement

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3983513A (en) * 1973-10-18 1976-09-28 Westinghouse Electric Corporation Incandescent lamp having a halogen-containing atmosphere and an integral reflector of non-reactive specular metal
US4027189A (en) * 1973-11-01 1977-05-31 Thorn Electrical Industries Limited Tungsten halogen lamp

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH91056A (de) * 1920-11-08 1921-12-16 Alexander Ehrenzweig Elektrische Spiegelreflex-Glühlampe.
FR1203844A (fr) * 1957-04-26 1960-01-21 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Lampe électrique sans culot
US3067357A (en) * 1960-09-21 1962-12-04 Gen Electric Electric discharge lamp electrode

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE683060C (de) * 1936-06-27 1939-10-28 Bosch Gmbh Robert Elektrische Projektionsgluehlampe
AT192502B (de) * 1955-08-03 1957-10-25 Gen Electric Elektrische Glühlampe
AT222751B (de) * 1960-06-17 1962-08-10 Egyesuelt Izzolampa Verfahren zur Herstellung von Glühlampenwendeln

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH91056A (de) * 1920-11-08 1921-12-16 Alexander Ehrenzweig Elektrische Spiegelreflex-Glühlampe.
FR1203844A (fr) * 1957-04-26 1960-01-21 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Lampe électrique sans culot
US3067357A (en) * 1960-09-21 1962-12-04 Gen Electric Electric discharge lamp electrode

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3351802A (en) * 1964-06-12 1967-11-07 Sylvania Electric Prod Single ended, quartz type incandescent lamp
US3445720A (en) * 1967-05-31 1969-05-20 John J Horan Monolithic electric lamps,mountable on cords and elsewhere
US4857804A (en) * 1982-04-28 1989-08-15 Gte Products Corporation Tungsten-halogen lamp with metal additive
WO2007063059A1 (fr) * 2005-11-29 2007-06-07 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampe electrique a ampoule comportant au moins un pincement

Also Published As

Publication number Publication date
DE1183596B (de) 1964-12-17
GB1078799A (en) 1967-08-09
FR1378621A (fr) 1964-11-13
DE1251433B (fr)
GB1026445A (en) 1966-04-20

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