GB231158A - Improvements relating to lighting units - Google Patents

Improvements relating to lighting units

Info

Publication number
GB231158A
GB231158A GB6745/25A GB674525A GB231158A GB 231158 A GB231158 A GB 231158A GB 6745/25 A GB6745/25 A GB 6745/25A GB 674525 A GB674525 A GB 674525A GB 231158 A GB231158 A GB 231158A
Authority
GB
United Kingdom
Prior art keywords
refractor
light
flange
conical
size towards
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
GB6745/25A
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.)
Metropolitan Vickers Electrical Co Ltd
Original Assignee
Metropolitan Vickers Electrical 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 Metropolitan Vickers Electrical Co Ltd filed Critical Metropolitan Vickers Electrical Co Ltd
Publication of GB231158A publication Critical patent/GB231158A/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)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

231,158. Metropolitan-Vickers Electrical Co., Ltd., (Assignees of Wood, L. A. S.). March 24, 1924, [Convention date]. Void [Published under Sect. 91 of the Act]. Street !amps.-A street lamp is provided with a refractor for directing the major portion of the light in a downward direction and for intensifying the light in two or more directions, the refractor comprising inner and outer transparent members 16, 17. The outer surface of the inner member 16 is provided with coaxial circular prisms 18 decreasing in size towards the centre which is left plain, and the inner surface of the outer member 17 is provided with longitudinal prisms 19 which decrease in size towards plain portions arranged according to the paths along which the light is to be concentrated. The refractor, which may be of frusto-conical, spherical or other form, is provided at its upper end with a flange which is supported by a metal ring 12 mounted on uprights attached to the base 3 or suspended from brackets 11 attached to the canopy 2. and a screwed metal collar 23 on the inner member 16 bears, through the intermediary of a washer 25, against a flange 21 on the outer member 17. Conical reflectors 6, 9 are, arranged below and above the refractor to reflect part of the light outwardly.
GB6745/25A 1924-03-24 1925-03-12 Improvements relating to lighting units Expired GB231158A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US231158XA 1924-03-24 1924-03-24

Publications (1)

Publication Number Publication Date
GB231158A true GB231158A (en) 1926-06-10

Family

ID=21813215

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6745/25A Expired GB231158A (en) 1924-03-24 1925-03-12 Improvements relating to lighting units

Country Status (1)

Country Link
GB (1) GB231158A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3366785A (en) * 1967-02-23 1968-01-30 Pemco Corp Lighting fixture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3366785A (en) * 1967-02-23 1968-01-30 Pemco Corp Lighting fixture

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