GB858052A - A device for increasing the luminosity of electric incandescent lamps - Google Patents

A device for increasing the luminosity of electric incandescent lamps

Info

Publication number
GB858052A
GB858052A GB37520/56A GB3752056A GB858052A GB 858052 A GB858052 A GB 858052A GB 37520/56 A GB37520/56 A GB 37520/56A GB 3752056 A GB3752056 A GB 3752056A GB 858052 A GB858052 A GB 858052A
Authority
GB
United Kingdom
Prior art keywords
lamp
filament
centre
spherical
dec
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
GB37520/56A
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.)
Centre National de la Recherche Scientifique CNRS
Original Assignee
Centre National de la Recherche Scientifique CNRS
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 Centre National de la Recherche Scientifique CNRS filed Critical Centre National de la Recherche Scientifique CNRS
Publication of GB858052A publication Critical patent/GB858052A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/202—Incandescent light sources

Abstract

858,052. Lamp reflectors. CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE. Dec. 7, 1956 [Dec. 9, 1955], No. 37520/56. Classes 75(2) and 75(4). Radiation approaching that of a blockbody is obtained from a polished light-emitting surface in a predetermined direction by reflecting emitted light back on to the surface where it is re-reflected in the predetermined direction. In Fig. 4, the filament 7 is located at the centre of a spherical mirror 8 formed in two parts 9, 10 of metal or silvered silica. Flanged portions 13, 14 are connected together, e.g. by screws, and fins 16 and cooling which is also achieved by air flow through openings 11, 12. The lamp socket is adjustable for centring. The bulb portion 6 may be part only of a larger envelope, Fig. 5 (not shown). The spherical reflectors may be in two sets of different radii and the source a bunched filament, Fig. 6 (not shown), and in Fig. 8 (not shown) an opaline bulb is placed with the part opposite the cap centred on the reflector. Alternatively a lamp with a nernst filament with its axis on the centre of the reflecting sphere may be used. Fig. 7 shows an arrangement in which a lens 21 and plane mirror 2<SP>111</SP> replace the spherical reflector, and a plane sheet of coloured glass 2<SP>11</SP> may be interposed to modify the colour of the emerging beam. Light from an auxiliary mono-chromatic lamp may be directed on to the polished emitting surface to provide reference spectrum lines.
GB37520/56A 1955-12-09 1956-12-07 A device for increasing the luminosity of electric incandescent lamps Expired GB858052A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR858052X 1955-12-09

Publications (1)

Publication Number Publication Date
GB858052A true GB858052A (en) 1961-01-04

Family

ID=9329763

Family Applications (1)

Application Number Title Priority Date Filing Date
GB37520/56A Expired GB858052A (en) 1955-12-09 1956-12-07 A device for increasing the luminosity of electric incandescent lamps

Country Status (1)

Country Link
GB (1) GB858052A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT398337B (en) * 1988-04-27 1994-11-25 Zizala Lichtsysteme Gmbh Vehicle headlight (headlamp)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT398337B (en) * 1988-04-27 1994-11-25 Zizala Lichtsysteme Gmbh Vehicle headlight (headlamp)

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