GB576591A - Improvements in refractors for use in street lighting - Google Patents

Improvements in refractors for use in street lighting

Info

Publication number
GB576591A
GB576591A GB17970/43A GB1797043A GB576591A GB 576591 A GB576591 A GB 576591A GB 17970/43 A GB17970/43 A GB 17970/43A GB 1797043 A GB1797043 A GB 1797043A GB 576591 A GB576591 A GB 576591A
Authority
GB
United Kingdom
Prior art keywords
prisms
refractors
horizontal
extending
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
GB17970/43A
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.)
SOLOMAN ENGLISH
Holophane Ltd
Original Assignee
SOLOMAN ENGLISH
Holophane 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 SOLOMAN ENGLISH, Holophane Ltd filed Critical SOLOMAN ENGLISH
Priority to GB17970/43A priority Critical patent/GB576591A/en
Publication of GB576591A publication Critical patent/GB576591A/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00Refractors for light sources

Landscapes

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

Abstract

576,591. Prismatic lamp refractors. HOLOPHANE, Ltd., and ENGLISH, S. Oct. 30, 1943, No. 17970. [Class 75 (ii)] Dome refractors for street lighting are formed with horizontal annular prisms 1, 2, 3 extending to a substantial angle above the light source and subtending at the light source L an angle extending to form 7¢‹ to 10‹ below the horizontal for refracting the incident light to an angle below the horizontal, and with vertical prisms 4 extending to from 20‹ to 25‹ below the horizontal for concentrating the light passing through the annular prisms and part of the light below the annular prisms in substantially opposite directions. The refractor may be formed in one piece with the prisms on its inner and outer surfaces or in two parts the outer part having prisms on its inner surface and the inner part having prisms on its outer surface. The outer part may be longer than the inner part and be formed with a shoulder resting on on a lip at the bottom of the inner part. The refractors may be of rounded form as illustrated in Specifications 337,398, [Class 75 (ii)], and 398,419.
GB17970/43A 1943-10-30 1943-10-30 Improvements in refractors for use in street lighting Expired GB576591A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB17970/43A GB576591A (en) 1943-10-30 1943-10-30 Improvements in refractors for use in street lighting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB17970/43A GB576591A (en) 1943-10-30 1943-10-30 Improvements in refractors for use in street lighting

Publications (1)

Publication Number Publication Date
GB576591A true GB576591A (en) 1946-04-11

Family

ID=10104374

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17970/43A Expired GB576591A (en) 1943-10-30 1943-10-30 Improvements in refractors for use in street lighting

Country Status (1)

Country Link
GB (1) GB576591A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3062953A (en) * 1959-05-05 1962-11-06 Mc Graw Edison Co Luminaire and refractor therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3062953A (en) * 1959-05-05 1962-11-06 Mc Graw Edison Co Luminaire and refractor therefor

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