GB465119A - Improvements in the manufacture of coiled-coil filaments for incandescent electric lamps and the like - Google Patents

Improvements in the manufacture of coiled-coil filaments for incandescent electric lamps and the like

Info

Publication number
GB465119A
GB465119A GB29984/35A GB2998435A GB465119A GB 465119 A GB465119 A GB 465119A GB 29984/35 A GB29984/35 A GB 29984/35A GB 2998435 A GB2998435 A GB 2998435A GB 465119 A GB465119 A GB 465119A
Authority
GB
United Kingdom
Prior art keywords
mandrel
filament
coiled
manufacture
temperature
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
Application number
GB29984/35A
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.)
Hygrade Sylvania Corp
Original Assignee
Hygrade Sylvania 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 Hygrade Sylvania Corp filed Critical Hygrade Sylvania Corp
Publication of GB465119A publication Critical patent/GB465119A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H01K3/02—Manufacture of incandescent bodies
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4981—Utilizing transitory attached element or associated separate material

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Resistance Heating (AREA)

Abstract

465,119. Coiling helices. HYGRADE SYLVANIA CORPORATION. Oct. 30, 1935, No. 29984. Convention date, Nov. 8, 1934. [Class 83 (iv)] [Also in Group XI] Cores.-In the manufacture of coiled coil tungsten filaments of lamps, discharge tubes, &c., the filament wire 1 is helically wound on a mandrel 2 of refractory metal such as molybdenum having a lower setting temperature than. the filament and the mandrel 2 is then wound on a second mandrel 3 of non-refractory material such as steel as shown in the Figure. The assembly is then heated to a temperature, e.g. 1100‹ C. at which the mandrel 2 is set without setting the tungsten filament. The mandrel 3 is then removed and the coiled mandrel 2 and filament heated to a temperature, e.g. 1650‹ C. at which the filament is set. The mandrel 2 is removed by dissolving with a mixture of nitric and sulphuric acid.
GB29984/35A 1934-11-08 1935-10-30 Improvements in the manufacture of coiled-coil filaments for incandescent electric lamps and the like Expired GB465119A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US752016A US2067746A (en) 1934-11-08 1934-11-08 Lamp filament and method of manufacture thereof

Publications (1)

Publication Number Publication Date
GB465119A true GB465119A (en) 1937-04-30

Family

ID=25024482

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29984/35A Expired GB465119A (en) 1934-11-08 1935-10-30 Improvements in the manufacture of coiled-coil filaments for incandescent electric lamps and the like

Country Status (4)

Country Link
US (1) US2067746A (en)
BE (1) BE412106A (en)
FR (1) FR797118A (en)
GB (1) GB465119A (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2927299A (en) * 1954-05-20 1960-03-01 Fredrick L Lefebvre Heater tube mounting
US3110098A (en) * 1960-11-25 1963-11-12 Sylvania Electric Prod Manufacture of wire coils
US3253894A (en) * 1962-01-12 1966-05-31 Westinghouse Electric Corp Composite wire and wire coil adapted for use in fabricating multiply-coiled electrodes
US3247699A (en) * 1962-01-12 1966-04-26 Westinghouse Electric Corp Manufacture of multiply-coiled electrodes for discharge devices
BE627771A (en) * 1962-02-05
US3237285A (en) * 1963-02-26 1966-03-01 Bendix Corp High frequency low noise twt helix fabrication
US3363304A (en) * 1965-04-06 1968-01-16 Atomic Energy Commission Usa Method of fabricating zirconium-beryllium-eutectic wire
US3629914A (en) * 1970-03-10 1971-12-28 Westinghouse Electric Corp Method of making an elongated singly coiled filament and mounting it in a tubular incandescent lamp
JPS5231668B1 (en) * 1971-07-14 1977-08-16
US3729787A (en) * 1971-09-22 1973-05-01 Westinghouse Electric Corp Method and apparatus for manufacturing beaded filament-coil components for electric lamps
US3803708A (en) * 1973-02-16 1974-04-16 Matsushita Electric Ind Co Ltd Method for making a resistor
US3863313A (en) * 1973-06-07 1975-02-04 Gte Sylvania Inc Manufacture of subminiature incandescent lamps
US3863314A (en) * 1973-06-07 1975-02-04 Gte Sylvania Inc Method of manufacturing miniature incandescent lamps
US5270609A (en) * 1991-12-11 1993-12-14 U.S. Philips Corporation Incandescent lamp having improved filament support structure

Also Published As

Publication number Publication date
FR797118A (en) 1936-04-21
US2067746A (en) 1937-01-12
BE412106A (en)

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