GB515418A - Improvement in road lighting systems - Google Patents

Improvement in road lighting systems

Info

Publication number
GB515418A
GB515418A GB4709/38A GB470938A GB515418A GB 515418 A GB515418 A GB 515418A GB 4709/38 A GB4709/38 A GB 4709/38A GB 470938 A GB470938 A GB 470938A GB 515418 A GB515418 A GB 515418A
Authority
GB
United Kingdom
Prior art keywords
road
degrees
source
feb
lamps
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
GB4709/38A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB515418A publication Critical patent/GB515418A/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
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/08—Lighting devices intended for fixed installation with a standard

Landscapes

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

Abstract

515,418. Lighting roads. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. Feb. 15, 1938, No, 4709. Convention date, Feb. 18, 1937. Drawings to Specification. [Classes 39 (ii), 75 (ii) and 75 (iv)] Roads are illuminated by light sources combined with reflectors or embodied in lamps of such a character that in certain defined zones the average illumination density on the side of the road remote from a light source and due to that source is at least twice that on the nearer side. The zones in question are not less than 5 degrees wide and extend along the road between two planes, one of which is inclined at least 30 degrees to the transverse plane across the road from the source and the other is inclined at least 60 degrees to the same plane. Appropriate reflectors and lamps are described and defined.
GB4709/38A 1937-02-18 1938-02-15 Improvement in road lighting systems Expired GB515418A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL218508X 1937-02-18

Publications (1)

Publication Number Publication Date
GB515418A true GB515418A (en) 1939-12-05

Family

ID=19779201

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4709/38A Expired GB515418A (en) 1937-02-18 1938-02-15 Improvement in road lighting systems

Country Status (6)

Country Link
BE (1) BE426416A (en)
CH (1) CH218508A (en)
DE (1) DE732410C (en)
FR (1) FR833828A (en)
GB (1) GB515418A (en)
NL (1) NL47943C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013009199A1 (en) * 2011-07-12 2013-01-17 Paulo Alexandre Teixeira E Silva Cardoso System with gradual change of light distribution or shadow distribution on a surface comprising lighting elements or photovoltaic elements

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0260478A3 (en) * 1986-09-15 1989-08-16 Holophane Company, Inc. Wall mounted luminaire
DE4431750A1 (en) * 1994-09-06 1996-03-07 Siemens Ag Locally fixed lighting installation for public roads with number of lamp units

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013009199A1 (en) * 2011-07-12 2013-01-17 Paulo Alexandre Teixeira E Silva Cardoso System with gradual change of light distribution or shadow distribution on a surface comprising lighting elements or photovoltaic elements
US9570639B2 (en) 2011-07-12 2017-02-14 Paulo Alexandre Teixeira E. Silva Cardoso System with gradual change of light distribution or shadow distribution on a surface comprising light elements or photovoltaic elements
US10578265B2 (en) 2011-07-12 2020-03-03 Paulo Alexandre Teixeira E. Silva Cardoso System with gradual change of light distribution or shadow distribution on a surface comprising light elements or photovoltaic elements

Also Published As

Publication number Publication date
CH218508A (en) 1941-12-15
DE732410C (en) 1943-04-21
NL47943C (en)
BE426416A (en)
FR833828A (en) 1938-11-02

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