GB1049626A - Improvements in or relating to electric incandescent lamps - Google Patents

Improvements in or relating to electric incandescent lamps

Info

Publication number
GB1049626A
GB1049626A GB29657/65A GB2965765A GB1049626A GB 1049626 A GB1049626 A GB 1049626A GB 29657/65 A GB29657/65 A GB 29657/65A GB 2965765 A GB2965765 A GB 2965765A GB 1049626 A GB1049626 A GB 1049626A
Authority
GB
United Kingdom
Prior art keywords
july
compound
relating
filament
incandescent lamps
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
GB29657/65A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1049626A publication Critical patent/GB1049626A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/02—Incandescent bodies
    • H01K1/04—Incandescent bodies characterised by the material thereof

Landscapes

  • Glass Compositions (AREA)
  • Discharge Lamp (AREA)

Abstract

1,049,626. Incandescent lamp filaments. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. July 13, 1965 [July 16, 1964], No. 29657/65. Heading H1F. A selectively radiating filament in an electric lamp consists of, or has a surface consisting of, a compound in which the concentration of free charge carriers lies between 2 x 10<SP>21</SP> and 2 x 10<SP>22</SP> atoms/cc. and the mobility of the carriers at the operating temperature is at least 2 cm<SP>2</SP>/VS. The filament may comprise a hexaboride of a rare earth or alkaline earth metal, for example lanthanum, cerium, praeseodymium, neodymium and ytterbium. Mixtures of these compounds may be used. The bulb filling may contain a volatile borohalogen compound, e.g. BF 3 , BCl 3 .
GB29657/65A 1964-07-16 1965-07-13 Improvements in or relating to electric incandescent lamps Expired GB1049626A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEN0025261 1964-07-16

Publications (1)

Publication Number Publication Date
GB1049626A true GB1049626A (en) 1966-11-30

Family

ID=7343361

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29657/65A Expired GB1049626A (en) 1964-07-16 1965-07-13 Improvements in or relating to electric incandescent lamps

Country Status (3)

Country Link
US (1) US3399321A (en)
GB (1) GB1049626A (en)
NL (1) NL6508996A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6077617A (en) * 1998-08-26 2000-06-20 Board Of Regents Of The University Of Nebraska Rare-earth boride thin film system
US6025038A (en) * 1998-08-26 2000-02-15 Board Of Regents Of The University Of Nebraska Method for depositing rare-earth boride onto a substrate
DE102011078522A1 (en) 2011-07-01 2013-01-03 Siemens Aktiengesellschaft Solar receiver for solar thermal system, has cermet layer which is formed of ytterbium hexaboride, arranged with Bragg mirror

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3134924A (en) * 1960-07-05 1964-05-26 Monsanto Co Emissive materials of a metal matrix with molecularly dispersed additives
US3132278A (en) * 1961-09-18 1964-05-05 Gen Electric Iodine cycle incandescent lamps
US3334261A (en) * 1965-10-24 1967-08-01 Sylvania Electric Prod High pressure discharge device having a fill including iodine mercury and at least one rare earth metal

Also Published As

Publication number Publication date
NL6508996A (en) 1966-01-17
US3399321A (en) 1968-08-27

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