US3758807A - Electric filament lamp - Google Patents

Electric filament lamp Download PDF

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Publication number
US3758807A
US3758807A US00175867A US3758807DA US3758807A US 3758807 A US3758807 A US 3758807A US 00175867 A US00175867 A US 00175867A US 3758807D A US3758807D A US 3758807DA US 3758807 A US3758807 A US 3758807A
Authority
US
United States
Prior art keywords
configurations
filament
lamp
supports
longer
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
US00175867A
Other languages
English (en)
Inventor
De Beeck H Op
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.)
US Philips Corp
Original Assignee
US Philips 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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3758807A publication Critical patent/US3758807A/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
    • H01K1/18—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
    • H01K1/02—Incandescent bodies
    • H01K1/14—Incandescent bodies characterised by the shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K7/00—Lamps for purposes other than general lighting

Definitions

  • the invention relates to an electric filament lamp having a tubular envelope which is sealed by pinches and comprises a filament which extends in the longitudinal direction of the lamp, said filament consisting of tral aperture in'which the relevant configuration is present, the outer circumference of said support bearing against the inside of the envelope.
  • a filament lamp is known for reproduction purposes. By means of this lamp the possibility is provided of uniformly exposing a surface to be exposed.
  • the filament is subjected for a few seconds to a' current pluse by which the temperature increases due to the resistance, so that the material recrystallises. Because during this operation the filament should extend coaxially in the lamp envelope, which in the case of a horizontal position of the envelope is avoided due to the influence of gravity, the filament is introduced into an electromagnetic field, so that the sagging as a result of gravityis compensated forl It has been found that in the known filament lamps of this type in which the supports which support the longer configurations are present between the center and each of the ends of the configuration, the intermediate members with the ends of the longer configurations present beside the supports have warped after the recrystallisation process.
  • an electric filament lamp according to the invention is characterized in that the supports which are present between the supports adjoining the pinches and which support the longer configurations are provided at the ends of the relevant configurations. As a result of this it is achieved that the longer configurations remain extending coaxially with the lamp envelope throughout their length during the recrystallisation process.
  • the filament lamp comprises a tubular lamp envelope 1 which is sealed at its ends by means of pinches 2.
  • the filament 3 is secured in the pinches by means of foils 4 and consists of the helically wound configurations 5a to 5g, which are connected by means of intermediate members 6.
  • the configurations to Se in the centre ofthe lamp envelope, are shorter than the configurations 5a, b, f, g located on the sides.
  • the short configurations 5c to 5e are supported by the supports 7c to 72, respectively.
  • the longer configurations 5a, 5b, 5f and 5g are each supported by two supports which are denoted by successively 7a, 7b, 7 f and 7g.
  • the supports 7 consist of helically wound pieces of wire which each bear against the inner wall of the lamp envelope with an end portion.
  • the supports 7a and 7g are present between the centre and the end of the configurations facing the adjoining pinch.
  • These supports may, however, also be provided on the said ends of the configurations.
  • the supports 70, 7b, 7f and 73 are provided at the ends of the associated configurations.
  • An electric filament lamp having a tubular envelope which' is sealed by pinches comprisng a filament which extends in the longitudinal direction of the lamp, said filament consisting of a number of helically wound configurations connected by straight intermediate members, the length of the configurations which are present in the proximity of the pinches'being greater than the length of the configurations present in the proximity of the center of the lamp, each of the longer configurations being supported by at least two supports and the shorter configurations by one support, each support comprising a central aperture in which the relevant configuration is present, the outer circumference of said support bearing against the inside of the envement.

Landscapes

  • Resistance Heating (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
US00175867A 1970-09-03 1971-08-30 Electric filament lamp Expired - Lifetime US3758807A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7013030.A NL160678C (nl) 1970-09-03 1970-09-03 Elektrische gloeilamp.

Publications (1)

Publication Number Publication Date
US3758807A true US3758807A (en) 1973-09-11

Family

ID=19810943

Family Applications (1)

Application Number Title Priority Date Filing Date
US00175867A Expired - Lifetime US3758807A (en) 1970-09-03 1971-08-30 Electric filament lamp

Country Status (8)

Country Link
US (1) US3758807A (de)
JP (1) JPS5329953B1 (de)
BE (1) BE772070A (de)
CA (1) CA934804A (de)
DE (1) DE2141791C3 (de)
FR (1) FR2107249A5 (de)
GB (1) GB1332571A (de)
NL (1) NL160678C (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4272698A (en) * 1978-12-01 1981-06-09 Ushio Denki Kabushikikaisha Tubular incandescent lamp
EP0387910A2 (de) * 1989-03-17 1990-09-19 Ushio Denki Kabushiki Kaisha Rohrglühlampe
US4959586A (en) * 1988-05-24 1990-09-25 U.S. Philips Corporation Electric incandescent lamp

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2154405B (en) * 1984-01-10 1987-07-01 Thorn Emi Domestic Appliances Heating apparatus
US5063325A (en) * 1990-03-16 1991-11-05 Thomson Consumer Electronics Inc. Color picture tube having improved shadow mask-frame assembly support

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2712089A (en) * 1955-06-28 Electric incandescent lamp
US3080497A (en) * 1959-12-11 1963-03-05 Gen Electric Bent end incandescent lamp
US3295007A (en) * 1964-06-25 1966-12-27 Gen Electric Differential output tubular incandescent lamp

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2712089A (en) * 1955-06-28 Electric incandescent lamp
US3080497A (en) * 1959-12-11 1963-03-05 Gen Electric Bent end incandescent lamp
US3295007A (en) * 1964-06-25 1966-12-27 Gen Electric Differential output tubular incandescent lamp

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4272698A (en) * 1978-12-01 1981-06-09 Ushio Denki Kabushikikaisha Tubular incandescent lamp
US4959586A (en) * 1988-05-24 1990-09-25 U.S. Philips Corporation Electric incandescent lamp
EP0387910A2 (de) * 1989-03-17 1990-09-19 Ushio Denki Kabushiki Kaisha Rohrglühlampe
EP0387910A3 (de) * 1989-03-17 1991-05-15 Ushio Denki Kabushiki Kaisha Rohrglühlampe

Also Published As

Publication number Publication date
FR2107249A5 (de) 1972-05-05
JPS5329953B1 (de) 1978-08-24
DE2141791B2 (de) 1978-03-09
BE772070A (fr) 1972-03-01
GB1332571A (en) 1973-10-03
DE2141791A1 (de) 1972-05-10
NL160678C (nl) 1979-11-15
NL160678B (nl) 1979-06-15
DE2141791C3 (de) 1978-11-02
NL7013030A (de) 1972-03-07
CA934804A (en) 1973-10-02

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