GB537896A - Improvements in or relating to lamps - Google Patents

Improvements in or relating to lamps

Info

Publication number
GB537896A
GB537896A GB107840A GB107840A GB537896A GB 537896 A GB537896 A GB 537896A GB 107840 A GB107840 A GB 107840A GB 107840 A GB107840 A GB 107840A GB 537896 A GB537896 A GB 537896A
Authority
GB
United Kingdom
Prior art keywords
faces
refracted
edges
shaped
light
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
GB107840A
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
Priority to GB107840A priority Critical patent/GB537896A/en
Publication of GB537896A publication Critical patent/GB537896A/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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/28—Cover glass
    • 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
    • F21S41/285—Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

537,896. Lamp lenses. MASON, F. Jan. 18, 1940, Nos. 1078 and 3956. [Class 75 (ii)] A lamp is fitted with a light-transmitting means, adapted to produce an anti-dazzle effect, or to be suitable for " black-out " requirements, constructed of two or more transparent plates a, b of flat or lens form, the contacting faces of the plates being shaped to provide right angled prismatic bodies a<SP>1</SP>, b<SP>1</SP> with edges f, g which are in substantial register. These edges are so inclined that light is refracted from the edge f of the plate a through a layer of air, and is then refracted through the layer b and emerges therefrom in such a way that the rays are in a particular plane or on one side only of this plane. The faces g are in planes perpendicular to the planes of the faces f, and these are arranged to form with the vertical an angle of 41 degrees, which is the critical refractive angle when glass is the material used and air the material which separates them. The faces g are rendered opaque, or reflecting and opaque by inserting dull or bright inserts between them. In the modifications shown in Figs. 4 and 5 the prismatic bodies a, b are shaped so as to form cavities k of parallelogram-like configuration, or of triangular configuration adjacent to the faces g, or f, g.
GB107840A 1940-01-18 1940-01-18 Improvements in or relating to lamps Expired GB537896A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB107840A GB537896A (en) 1940-01-18 1940-01-18 Improvements in or relating to lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB107840A GB537896A (en) 1940-01-18 1940-01-18 Improvements in or relating to lamps

Publications (1)

Publication Number Publication Date
GB537896A true GB537896A (en) 1941-07-11

Family

ID=9715779

Family Applications (1)

Application Number Title Priority Date Filing Date
GB107840A Expired GB537896A (en) 1940-01-18 1940-01-18 Improvements in or relating to lamps

Country Status (1)

Country Link
GB (1) GB537896A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5156453A (en) * 1990-02-27 1992-10-20 Valeo Vision Embellisher for at least partly surrounding a glass, more particularly a driving lamp glass for an automotive vehicle
US5335151A (en) * 1990-08-31 1994-08-02 Anders Dahlberg Marker light

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5156453A (en) * 1990-02-27 1992-10-20 Valeo Vision Embellisher for at least partly surrounding a glass, more particularly a driving lamp glass for an automotive vehicle
US5335151A (en) * 1990-08-31 1994-08-02 Anders Dahlberg Marker light

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