GB191517657A - An Improvement in Reflector Lamps. - Google Patents

An Improvement in Reflector Lamps.

Info

Publication number
GB191517657A
GB191517657A GB191517657DA GB191517657A GB 191517657 A GB191517657 A GB 191517657A GB 191517657D A GB191517657D A GB 191517657DA GB 191517657 A GB191517657 A GB 191517657A
Authority
GB
United Kingdom
Prior art keywords
reflector
lens
ellipsoidal
lamps
lights
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
Inventor
William Thomas Coulson
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 GB191517657A publication Critical patent/GB191517657A/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
    • F21S41/321—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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses

Landscapes

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

Abstract

17,657. Coulson, W. T. Dec. 17. Search-lights ; vehicular and like lanterns.-An approximately ellipsoidal lamp reflector has the form traced out by the revolution of part of an ellipse about a line near to, and parallel or slightly inclined to, the major axis as shown in Figs. 1 and 3. The reflector may be used in conjunction with a converging-lens beyond the second focus F<2>, Fig. 5, at a distance equal to the focal length of the lens, or a diverging-lens between the foci. Such arrangements may be employed in optical lanterns, kinematographs, and motor-vehicle and like lamps. An additional reflector of parabolic or ellipsoidal form as shown in Fig. 10, may be employed, for instance, is search-lights and signalling-lamps, in which case the second reflector is ellipsoidal and the lens and the second reflector are arranged to bring the light to a focus at the same point.
GB191517657D 1915-12-17 1915-12-17 An Improvement in Reflector Lamps. Expired GB191517657A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191517657T 1915-12-17

Publications (1)

Publication Number Publication Date
GB191517657A true GB191517657A (en) 1916-10-19

Family

ID=34361955

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191517657D Expired GB191517657A (en) 1915-12-17 1915-12-17 An Improvement in Reflector Lamps.

Country Status (1)

Country Link
GB (1) GB191517657A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3720460A (en) * 1971-04-19 1973-03-13 Optical Radiation Corp Projection light source and optical system
CN115539900A (en) * 2022-11-28 2022-12-30 常州星宇车灯股份有限公司 Polarizing structure and automobile lamp

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3720460A (en) * 1971-04-19 1973-03-13 Optical Radiation Corp Projection light source and optical system
CN115539900A (en) * 2022-11-28 2022-12-30 常州星宇车灯股份有限公司 Polarizing structure and automobile lamp

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