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GB509337A - Improvements in and relating to anti-dazzle reflectors for lamps - Google Patents

Improvements in and relating to anti-dazzle reflectors for lamps

Info

Publication number
GB509337A
GB509337A GB4716/38A GB471638A GB509337A GB 509337 A GB509337 A GB 509337A GB 4716/38 A GB4716/38 A GB 4716/38A GB 471638 A GB471638 A GB 471638A GB 509337 A GB509337 A GB 509337A
Authority
GB
United Kingdom
Prior art keywords
reflector
lens
point
line
lamp
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
GB4716/38A
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 GB4716/38A priority Critical patent/GB509337A/en
Publication of GB509337A publication Critical patent/GB509337A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/08—Controlling the distribution of the light emitted by adjustment of elements by movement of the screens or filters
    • 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
    • F21S41/265—Composite lenses; Lenses with a patch-like shape
    • 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
    • F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
    • 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

Landscapes

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

Abstract

509,337. Vehicle &c. lamps. DIE TRICH, F. R. Feb. 15, 1938, No. 4710. [A Specification was laid open to inspection under Sect. 91. of the Acts, Aug. 19, 1938.] [Class 75 (iv)] An anti-dazzle reflector, more particularly for the headlamps of motor vehicles, comprises an ellipsoidal reflector 1 tending to project on one side of a plane containing the optical axis A-A<1>, a beam having a point or line of convergence lying in the optical axis, a hood 2 projecting from the reflector on the same side of said plane to a point beyond the point or line, of convergence and a lens or lens system which spreads the rays so that they converge on a transverse line or lines between the lens and hood. In the form shown in Figs. 1 and 2, the reflector is a semi-ellipsoid with a lamp at its focal point F. A cylindrical lens 13 ribbed vertically to form on it a series of sernicylindrical lenses 9 disperses the rays so that instead of converging to a point they converge on a line F2, Fig. 1. In a modified form, the reflector extends below the axis A-A<1> and is normally screened from the lamp by a spherical reflector arranged beneath the lamp so that it may be swung aside to give a long-range beam if required. A removable screen is mounted between the lens and source so that the light may be rendered invisible to aircraft. The Specification as open to inspection under Sect. 91 comprises also modifications in which the lens comprises a series of semi-cylindrical ribs formed on a plain glass, the reflector is parabolic instead of ellipsoidal or the light source is out of focus. This subject-matter does not appear in the Specification as accepted.
GB4716/38A 1938-02-15 1938-02-15 Improvements in and relating to anti-dazzle reflectors for lamps Expired GB509337A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4716/38A GB509337A (en) 1938-02-15 1938-02-15 Improvements in and relating to anti-dazzle reflectors for lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4716/38A GB509337A (en) 1938-02-15 1938-02-15 Improvements in and relating to anti-dazzle reflectors for lamps

Publications (1)

Publication Number Publication Date
GB509337A true GB509337A (en) 1939-07-14

Family

ID=9782438

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4716/38A Expired GB509337A (en) 1938-02-15 1938-02-15 Improvements in and relating to anti-dazzle reflectors for lamps

Country Status (1)

Country Link
GB (1) GB509337A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2503500A (en) * 1944-12-20 1950-04-11 Clyde M Lowry Head lamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2503500A (en) * 1944-12-20 1950-04-11 Clyde M Lowry Head lamp

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