EP0271857A3 - Compact coiled coil incandescent filament with supports - Google Patents

Compact coiled coil incandescent filament with supports Download PDF

Info

Publication number
EP0271857A3
EP0271857A3 EP87118489A EP87118489A EP0271857A3 EP 0271857 A3 EP0271857 A3 EP 0271857A3 EP 87118489 A EP87118489 A EP 87118489A EP 87118489 A EP87118489 A EP 87118489A EP 0271857 A3 EP0271857 A3 EP 0271857A3
Authority
EP
European Patent Office
Prior art keywords
filament
compact
supports
equal
incandescent lamp
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.)
Granted
Application number
EP87118489A
Other languages
German (de)
French (fr)
Other versions
EP0271857B1 (en
EP0271857A2 (en
Inventor
Pierce Johnson, Jr.
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 Sylvania Inc
Original Assignee
GTE Products 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 GTE Products Corp filed Critical GTE Products Corp
Publication of EP0271857A2 publication Critical patent/EP0271857A2/en
Publication of EP0271857A3 publication Critical patent/EP0271857A3/en
Application granted granted Critical
Publication of EP0271857B1 publication Critical patent/EP0271857B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • H01K1/02—Incandescent bodies
    • H01K1/14—Incandescent bodies characterised by the shape

Landscapes

  • Resistance Heating (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

This invention provides an improved compact fine wire incandescent lamp filament and method for making the same. The filament has a primary mandrel ratio in the range of about 1.40 to about 4.00 and a secondary mandrel ratio which is greater than or equal to the primary mandrel ratio. The length between supports is kept less than or equal to 20 times the secondary diameter.
The improved filament design exhibits an increase in compactness and retains or increases structural rigidity while exhibiting minimal sag when the filament is incorporated into an incandescent lamp of the tungsten halogen type variety.
The compact coiling method is particularly useful in designing compact filaments for high voltage applications where it is desirable to eliminate the use of rectifying means to lower the effective voltage across the filament.
EP19870118489 1986-12-16 1987-12-14 Compact coiled coil incandescent filament with supports Expired - Lifetime EP0271857B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US94233986A 1986-12-16 1986-12-16
US942339 1986-12-16

Publications (3)

Publication Number Publication Date
EP0271857A2 EP0271857A2 (en) 1988-06-22
EP0271857A3 true EP0271857A3 (en) 1990-05-16
EP0271857B1 EP0271857B1 (en) 1997-04-02

Family

ID=25477952

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870118489 Expired - Lifetime EP0271857B1 (en) 1986-12-16 1987-12-14 Compact coiled coil incandescent filament with supports

Country Status (2)

Country Link
EP (1) EP0271857B1 (en)
DE (1) DE3752039T2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4959585A (en) * 1988-09-06 1990-09-25 General Electric Company Electric incandescent lamp and method of manufacture therefor
US4918356A (en) * 1988-10-17 1990-04-17 General Electric Company Electric incandescent lamp and method of manufacture therefor
US5272408A (en) * 1991-05-09 1993-12-21 Gte Products Corporation Lamp and reflector assembly
CA2106984C (en) * 1991-04-03 2001-12-18 Robert E. Levin Lamp and reflector assembly
AT407961B (en) * 1998-12-03 2001-07-25 Alfred Dr Schneider RADIATION LAMP

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2034540A (en) * 1934-07-18 1936-03-17 Gen Electric Manufacture of coiled coil or double helical filaments
US2359302A (en) * 1942-06-11 1944-10-03 Tung Sol Lamp Works Inc Incandescent lamp and method of manufacture
GB1062819A (en) * 1963-08-12 1967-03-22 Sylvania Electric Prod Incandescent lamps using coiled-coil filaments
US3383539A (en) * 1967-02-06 1968-05-14 Sylvania Electric Prod Projection lamp
GB1147140A (en) * 1967-03-10 1969-04-02 Sylvania Electric Prod Incandescent lamp
DE1489601A1 (en) * 1962-10-16 1969-08-28 Westinghouse Electric Corp Internal structure for an electrical device, in particular a frame for an electric light bulb
US3486065A (en) * 1968-01-12 1969-12-23 Westinghouse Electric Corp Means for centralizing an incandescible coil about the longitudinal lamp axis
US3634722A (en) * 1970-03-30 1972-01-11 Sylvania Electric Prod Tungsten halogen lamp having improved filament support
US4208606A (en) * 1979-01-10 1980-06-17 Westinghouse Electric Corp. Filament-support means for a tubular incandescent lamp
GB2065966A (en) * 1979-12-19 1981-07-01 Gen Electric Triple-coil incadescent filament
FR2550383A1 (en) * 1983-08-01 1985-02-08 Gen Electric HIGH EFFICIENCY INCANDESCENT LIGHTING DEVICE
US4499401A (en) * 1983-03-03 1985-02-12 General Electric Company Triple coil incandescent filament
EP0241911A2 (en) * 1986-04-14 1987-10-21 GTE Products Corporation An improved reflector-type lamp having reduced focus loss

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53110275A (en) * 1977-03-08 1978-09-26 Toshiba Corp Incandescent light bulb

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2034540A (en) * 1934-07-18 1936-03-17 Gen Electric Manufacture of coiled coil or double helical filaments
US2359302A (en) * 1942-06-11 1944-10-03 Tung Sol Lamp Works Inc Incandescent lamp and method of manufacture
DE1489601A1 (en) * 1962-10-16 1969-08-28 Westinghouse Electric Corp Internal structure for an electrical device, in particular a frame for an electric light bulb
GB1062819A (en) * 1963-08-12 1967-03-22 Sylvania Electric Prod Incandescent lamps using coiled-coil filaments
US3383539A (en) * 1967-02-06 1968-05-14 Sylvania Electric Prod Projection lamp
GB1147140A (en) * 1967-03-10 1969-04-02 Sylvania Electric Prod Incandescent lamp
US3486065A (en) * 1968-01-12 1969-12-23 Westinghouse Electric Corp Means for centralizing an incandescible coil about the longitudinal lamp axis
US3634722A (en) * 1970-03-30 1972-01-11 Sylvania Electric Prod Tungsten halogen lamp having improved filament support
US4208606A (en) * 1979-01-10 1980-06-17 Westinghouse Electric Corp. Filament-support means for a tubular incandescent lamp
GB2065966A (en) * 1979-12-19 1981-07-01 Gen Electric Triple-coil incadescent filament
US4499401A (en) * 1983-03-03 1985-02-12 General Electric Company Triple coil incandescent filament
FR2550383A1 (en) * 1983-08-01 1985-02-08 Gen Electric HIGH EFFICIENCY INCANDESCENT LIGHTING DEVICE
EP0241911A2 (en) * 1986-04-14 1987-10-21 GTE Products Corporation An improved reflector-type lamp having reduced focus loss

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 2, no. 142, 24th November 1978, page 4716 M 78; & JP-A-53 110 275 (TOKYO SHIBAURA DENKI K.K.) 26-09-1978 *

Also Published As

Publication number Publication date
EP0271857B1 (en) 1997-04-02
EP0271857A2 (en) 1988-06-22
DE3752039D1 (en) 1997-05-07
DE3752039T2 (en) 1997-10-30

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