GB892585A - Improvements in electric lamp - Google Patents

Improvements in electric lamp

Info

Publication number
GB892585A
GB892585A GB25727/58A GB2572758A GB892585A GB 892585 A GB892585 A GB 892585A GB 25727/58 A GB25727/58 A GB 25727/58A GB 2572758 A GB2572758 A GB 2572758A GB 892585 A GB892585 A GB 892585A
Authority
GB
United Kingdom
Prior art keywords
substance
envelope
phosphor
filament
activated
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
GB25727/58A
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.)
Duro Test Corp
Original Assignee
Duro Test 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 Duro Test Corp filed Critical Duro Test Corp
Publication of GB892585A publication Critical patent/GB892585A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/96—Lamps with light-emitting discharge path and separately-heated incandescent body within a common envelope, e.g. for simulating daylight

Landscapes

  • Luminescent Compositions (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

892,585. Incandescent lamps. DURO-TEST CORPORATION. Aug. 11, 1958 [Aug. 13, 1957], No. 25727/58. Class 39(2) A light source comprises an evacuated envelope containing an incandescible tungsten source, a substance which dissociates in the presence of the source and a second substance which converts the heat of recombination of the dissociated substance into visible light. The first substance may be hydrogen and the second a phosphor. Alternatively magnesium aluminate activated with manganese, boron nitride activated with carbon, zinc silicate activated with manganese or phosphorus in vapour form may be used as the second substance. The second substance may be in the form of a coating on the inner surface of the envelope. A lamp of normal form having a filling of hydrogen at low pressure may be used. A cylindrical lamp having a glass tubular support 28, Fig. 7, mounted on the stem tube 12 and supporting a filament 14 by means of more hooks may be used. The support 28 as well as the interior surface of the envelope 10 may be coated with phosphor. In a modification, the filament support 30, Fig. 10, is in the form of a series of semi-cylindrical chambers with a section of the filament 14 passing axially through their centres, the interior wall of the envelope 10 and the surfaces of the chambers being coated with phosphor.
GB25727/58A 1957-08-13 1958-08-11 Improvements in electric lamp Expired GB892585A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US892585XA 1957-08-13 1957-08-13

Publications (1)

Publication Number Publication Date
GB892585A true GB892585A (en) 1962-03-28

Family

ID=22216601

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25727/58A Expired GB892585A (en) 1957-08-13 1958-08-11 Improvements in electric lamp

Country Status (1)

Country Link
GB (1) GB892585A (en)

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