GB879062A - A gas-filled incandescent electric lamp, more especially for projection purposes - Google Patents

A gas-filled incandescent electric lamp, more especially for projection purposes

Info

Publication number
GB879062A
GB879062A GB30480/59A GB3048059A GB879062A GB 879062 A GB879062 A GB 879062A GB 30480/59 A GB30480/59 A GB 30480/59A GB 3048059 A GB3048059 A GB 3048059A GB 879062 A GB879062 A GB 879062A
Authority
GB
United Kingdom
Prior art keywords
lamp
gas
hydrogen
sections
electric 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.)
Expired
Application number
GB30480/59A
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.)
Egyesuelt Izzolampa es Villamossagi Rt
Original Assignee
Egyesuelt Izzolampa es Villamossagi Rt
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 Egyesuelt Izzolampa es Villamossagi Rt filed Critical Egyesuelt Izzolampa es Villamossagi Rt
Publication of GB879062A publication Critical patent/GB879062A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01K1/00—Details
    • H01K1/50—Selection of substances for gas fillings; Specified pressure thereof

Landscapes

  • Discharge Lamp (AREA)
  • Resistance Heating (AREA)

Abstract

879,062. Electric incandescent lamps. EGYESULT IZZOLAMPA ES VILLAMOSSAGI R. T. Sept. 7, 1959 [Sept. 5, 1958], No. 30480/59. Drawings to Specification. Class 39(2). An electric lamp especially for projection, having a gas filling of which at least half is nitrogen and a coil shaped filament made up of a plurality of sections of singly or doubly coiled Tungsten wire in series, the operating temperature of the filament being more than 2500‹C. at the rated voltage, and in which the stress voltage along the sections is greater than 12V per mm and/or that between adjacent sections is greater than 20V per mm, contains an addition of between 0.5 and 5% of hydrogen by volume. No inert gas may be present in the lamp. The surfaces of components of the lamp in contact with the gas filling, particularly the glass envelope of the lamp, should be free from oxides reducible by hydrogen under operating conditions. In an example, the filling comprised 50 % nitrogen, 48.5% argon and 1.5% hydrogen. Specification 838,562 is referred to.
GB30480/59A 1958-09-05 1959-09-07 A gas-filled incandescent electric lamp, more especially for projection purposes Expired GB879062A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HU879062X 1958-09-05

Publications (1)

Publication Number Publication Date
GB879062A true GB879062A (en) 1961-10-04

Family

ID=10980790

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30480/59A Expired GB879062A (en) 1958-09-05 1959-09-07 A gas-filled incandescent electric lamp, more especially for projection purposes

Country Status (2)

Country Link
GB (1) GB879062A (en)
NL (1) NL242938A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0115392A2 (en) * 1983-01-29 1984-08-08 Thorn Emi Plc Improvements in tungsten halogen incandescent lamps
US5493170A (en) * 1994-09-09 1996-02-20 Philips Electronics North America Corporation High efficiency sealed beam reflector lamp
US6170359B1 (en) * 1998-09-16 2001-01-09 Michael Hoffman Micro tube cap opening device with tube holder and slidable lifting bar
EP1154464A1 (en) * 2000-05-12 2001-11-14 General Electric Company Incandescent lamp for use in high efficiency illumination systems

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0115392A2 (en) * 1983-01-29 1984-08-08 Thorn Emi Plc Improvements in tungsten halogen incandescent lamps
EP0115392A3 (en) * 1983-01-29 1985-05-15 Thorn Emi Plc Improvements in tungsten halogen incandescent lamps
US4743802A (en) * 1983-01-29 1988-05-10 Thorn Emi Plc Tungsten halogen incandescent lamp with arc preventing fill
US5493170A (en) * 1994-09-09 1996-02-20 Philips Electronics North America Corporation High efficiency sealed beam reflector lamp
US6170359B1 (en) * 1998-09-16 2001-01-09 Michael Hoffman Micro tube cap opening device with tube holder and slidable lifting bar
EP1154464A1 (en) * 2000-05-12 2001-11-14 General Electric Company Incandescent lamp for use in high efficiency illumination systems

Also Published As

Publication number Publication date
NL242938A (en)

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