GB429357A - Improvements relating to the projection of light - Google Patents

Improvements relating to the projection of light

Info

Publication number
GB429357A
GB429357A GB3349533A GB3349533A GB429357A GB 429357 A GB429357 A GB 429357A GB 3349533 A GB3349533 A GB 3349533A GB 3349533 A GB3349533 A GB 3349533A GB 429357 A GB429357 A GB 429357A
Authority
GB
United Kingdom
Prior art keywords
reflector
lens
source
light
projection
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
GB3349533A
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.)
HERBERT CHRISTOPHER WHEAT
Edison Swan Electric Co Ltd
Original Assignee
HERBERT CHRISTOPHER WHEAT
Edison Swan Electric Co Ltd
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 HERBERT CHRISTOPHER WHEAT, Edison Swan Electric Co Ltd filed Critical HERBERT CHRISTOPHER WHEAT
Priority to GB3349533A priority Critical patent/GB429357A/en
Publication of GB429357A publication Critical patent/GB429357A/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
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors

Landscapes

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

Abstract

429,357. Lamps with trough-shaped reflectors. EDISON SWAN ELECTRIC CO., Ltd., 123, Queen Victoria Street, London, and WHEAT, H. C., Bloxham, West Drive, Harrow Weald Park, Middlesex. Nov. 29, 1933, No. 33495. [Classes 75 (ii) and 75 (iv)] A linear light source A is combined with a part cylindrical stepped lens BC and a troughshaped reflector adapted to reflect all light issuing from the source which does not fall upon the lens in part direct into the beam and the remainder back through the source. The parts DF, EG of the reflector are parabolic, with focus at A, and the part DHJE is semicylindrical. The arrangement may be such that the lens produces a parallel core and the reflector a diverging exterior beam.
GB3349533A 1933-11-29 1933-11-29 Improvements relating to the projection of light Expired GB429357A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3349533A GB429357A (en) 1933-11-29 1933-11-29 Improvements relating to the projection of light

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3349533A GB429357A (en) 1933-11-29 1933-11-29 Improvements relating to the projection of light

Publications (1)

Publication Number Publication Date
GB429357A true GB429357A (en) 1935-05-29

Family

ID=10353712

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3349533A Expired GB429357A (en) 1933-11-29 1933-11-29 Improvements relating to the projection of light

Country Status (1)

Country Link
GB (1) GB429357A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3152765A (en) * 1960-08-20 1964-10-13 Infranor Sa Light projector
US3701896A (en) * 1971-02-25 1972-10-31 Itt Luminaire for area lighting
WO2010106391A1 (en) * 2009-03-17 2010-09-23 Michael Yi Chu Primary ens set for lighting fixtures

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3152765A (en) * 1960-08-20 1964-10-13 Infranor Sa Light projector
US3701896A (en) * 1971-02-25 1972-10-31 Itt Luminaire for area lighting
WO2010106391A1 (en) * 2009-03-17 2010-09-23 Michael Yi Chu Primary ens set for lighting fixtures

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