GB389583A - Improvements in refractors for directing light - Google Patents

Improvements in refractors for directing light

Info

Publication number
GB389583A
GB389583A GB34600/31A GB3460031A GB389583A GB 389583 A GB389583 A GB 389583A GB 34600/31 A GB34600/31 A GB 34600/31A GB 3460031 A GB3460031 A GB 3460031A GB 389583 A GB389583 A GB 389583A
Authority
GB
United Kingdom
Prior art keywords
prisms
refractors
refractor
directing light
general electric
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
GB34600/31A
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB34600/31A priority Critical patent/GB389583A/en
Publication of GB389583A publication Critical patent/GB389583A/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
    • F21V5/00—Refractors for light sources

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

389,583. Prismatic refractors. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London, BEGGS, S. S. and WILSON, G. H., c/o General Electric Co., Wembley, Middlesex. Dec. 14, 1931, No. 34600. [Class 75 (ii).] A refractor having prismatic elements for directing light in preferred directions has a smooth outer surface 1 and an inner surface formed with cross-refracting prisms 2, which provide relatively large deviation, on one part, and prisms 3, producing relatively small deviation, on another part. In the crossrefracting prisms, light falls on two surfaces, the rays incident on one surface crossing within the prisms those incident on the other. A clear portion 4 is provided. A spherical reflector may be placed below the refractor.
GB34600/31A 1931-12-14 1931-12-14 Improvements in refractors for directing light Expired GB389583A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB34600/31A GB389583A (en) 1931-12-14 1931-12-14 Improvements in refractors for directing light

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB34600/31A GB389583A (en) 1931-12-14 1931-12-14 Improvements in refractors for directing light

Publications (1)

Publication Number Publication Date
GB389583A true GB389583A (en) 1933-03-23

Family

ID=10367657

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34600/31A Expired GB389583A (en) 1931-12-14 1931-12-14 Improvements in refractors for directing light

Country Status (1)

Country Link
GB (1) GB389583A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3619603A (en) * 1969-05-07 1971-11-09 Holophane Co Inc Street-lighting luminaire
FR2441128A1 (en) * 1978-11-10 1980-06-06 Backer Adrien Sa High intensity light beam navigation beacon - has double transparent covers over light source with three internal lens systems

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3619603A (en) * 1969-05-07 1971-11-09 Holophane Co Inc Street-lighting luminaire
FR2441128A1 (en) * 1978-11-10 1980-06-06 Backer Adrien Sa High intensity light beam navigation beacon - has double transparent covers over light source with three internal lens systems

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