GB379568A - Improvements in search-lights - Google Patents

Improvements in search-lights

Info

Publication number
GB379568A
GB379568A GB32466/31A GB3246631A GB379568A GB 379568 A GB379568 A GB 379568A GB 32466/31 A GB32466/31 A GB 32466/31A GB 3246631 A GB3246631 A GB 3246631A GB 379568 A GB379568 A GB 379568A
Authority
GB
United Kingdom
Prior art keywords
rays
searchlight
cone
reflector
lens
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
GB32466/31A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB379568A publication Critical patent/GB379568A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/338—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector having surface portions added to its general concavity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/331—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas
    • F21S41/333—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas with discontinuity at the junction between adjacent areas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/36—Combinations of two or more separate reflectors
    • F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • F21S41/435—Hoods or cap-shaped

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

379,568. Searchlights. REYMOND, L. D., 14, Rue du Val d'Osne, St-Maurice, Seine, France. Nov. 23, 1931, No. 32466. Convention date, Nov. 26, 1930. Addition to 357,907. [Class 75 (iv).] In a searchlight comprising a reflecting surface of revolution 6 adapted to intercept rays from the front half of a source of light 1-1a and to direct them towards a small region substantially coinciding with the focus of a projection lens 9, the rays being re-directed from this small region on to the lens by means of a small reflecting cone 7 or like surface of revolution situated on the common axis X-X of the searchlight, as described'in the parent Specification, rearwardly directed rays are intercepted by a central reflector 11 and reflected forwardly in an annular beam around the cone and converging substantially in the focal plane of the lens. The generatrix of the reflector 11 may comprise two elliptical arcs CF, FD having proximate foci substantially coinciding with the end 1a of the filament 1-1a and remote foci on the lines FH, DH or on the sides of these lines remote from the focus 1a. A screen 13 may be disposed adjacent the apex of the cone so as to cut off those rays which would otherwise be projected upwardly from the searchlight. In a modification the lower halves of the reflectors 6, 11 are replaced by a recuperating reflector which is preferably spherical with its centre coinciding with the mid-point of the filament.
GB32466/31A 1930-11-26 1931-11-23 Improvements in search-lights Expired GB379568A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR379568X 1930-11-26

Publications (1)

Publication Number Publication Date
GB379568A true GB379568A (en) 1932-09-01

Family

ID=8895262

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32466/31A Expired GB379568A (en) 1930-11-26 1931-11-23 Improvements in search-lights

Country Status (1)

Country Link
GB (1) GB379568A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0779474A1 (en) * 1995-12-15 1997-06-18 Zizala Lichtsysteme GmbH Headlamp with double reflector
US5695277A (en) * 1994-10-28 1997-12-09 Samsung Electronics Co., Ltd. Light source apparatus for generating parallel light having dual-mirrors for eliminating lamp shadow effects
EP1434001A2 (en) * 2002-12-24 2004-06-30 Ichikoh Industries, Ltd. Vehicle lamp
EP1739345A1 (en) * 2005-06-29 2007-01-03 Valeo Vision Optical module for automotive vehicle
WO2013139896A1 (en) * 2012-03-22 2013-09-26 Hella Kgaa Hueck & Co. Headlamp for vehicles

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5695277A (en) * 1994-10-28 1997-12-09 Samsung Electronics Co., Ltd. Light source apparatus for generating parallel light having dual-mirrors for eliminating lamp shadow effects
EP0779474A1 (en) * 1995-12-15 1997-06-18 Zizala Lichtsysteme GmbH Headlamp with double reflector
EP1434001A2 (en) * 2002-12-24 2004-06-30 Ichikoh Industries, Ltd. Vehicle lamp
EP1434001A3 (en) * 2002-12-24 2005-05-04 Ichikoh Industries, Ltd. Vehicle lamp
US7036967B2 (en) 2002-12-24 2006-05-02 Ichikoh Industries, Ltd. Vehicle lamp
EP1739345A1 (en) * 2005-06-29 2007-01-03 Valeo Vision Optical module for automotive vehicle
FR2887959A1 (en) * 2005-06-29 2007-01-05 Valeo Vision Sa LUMINOUS PROJECTOR FOR MOTOR VEHICLE
WO2013139896A1 (en) * 2012-03-22 2013-09-26 Hella Kgaa Hueck & Co. Headlamp for vehicles

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