CA1014541A - Light retroreflective system for improving nighttime visibility to signs and roadway surfaces - Google Patents

Light retroreflective system for improving nighttime visibility to signs and roadway surfaces

Info

Publication number
CA1014541A
CA1014541A CA208,026A CA208026A CA1014541A CA 1014541 A CA1014541 A CA 1014541A CA 208026 A CA208026 A CA 208026A CA 1014541 A CA1014541 A CA 1014541A
Authority
CA
Canada
Prior art keywords
signs
roadway surfaces
nighttime visibility
light retroreflective
retroreflective system
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
CA208,026A
Other languages
English (en)
Other versions
CA208026S (en
Inventor
Ludwig Eigenmann
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of CA1014541A publication Critical patent/CA1014541A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/12—Reflex reflectors
    • G02B5/126—Reflex reflectors including curved refracting surface
    • G02B5/128—Reflex reflectors including curved refracting surface transparent spheres being embedded in matrix
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/50—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users
    • E01F9/506—Road surface markings; Kerbs or road edgings, specially adapted for alerting road users characterised by the road surface marking material, e.g. comprising additives for improving friction or reflectivity; Methods of forming, installing or applying markings in, on or to road surfaces
    • E01F9/524—Reflecting elements specially adapted for incorporation in or application to road surface markings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/12—Reflex reflectors
    • G02B5/126—Reflex reflectors including curved refracting surface

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Signs Or Road Markings (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Navigation (AREA)
CA208,026A 1973-08-29 1974-08-28 Light retroreflective system for improving nighttime visibility to signs and roadway surfaces Expired CA1014541A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT28320/73A IT993807B (it) 1973-08-29 1973-08-29 Perfezionamenti agli elementi catarifrangenti in particolare per segnaletica stradale e relativi elementi perfezionati

Publications (1)

Publication Number Publication Date
CA1014541A true CA1014541A (en) 1977-07-26

Family

ID=11223355

Family Applications (1)

Application Number Title Priority Date Filing Date
CA208,026A Expired CA1014541A (en) 1973-08-29 1974-08-28 Light retroreflective system for improving nighttime visibility to signs and roadway surfaces

Country Status (10)

Country Link
US (1) US3981557A (cs)
JP (1) JPS5074398A (cs)
CA (1) CA1014541A (cs)
DE (1) DE2441491A1 (cs)
ES (1) ES205543Y (cs)
FI (1) FI251774A7 (cs)
FR (1) FR2242519B1 (cs)
GB (1) GB1443618A (cs)
IT (1) IT993807B (cs)
NO (1) NO137602C (cs)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4072403A (en) * 1975-07-16 1978-02-07 Ludwig Eigenmann Retro-reflecting assembly
IT1063317B (it) * 1976-05-19 1985-02-11 Eigenmann Ludwig Perfezionamento agli elementi retroriflettenti di tipo lenticolare in particolare per segnaletica stradale e relativi elementi perfezionati
IT1092491B (it) * 1978-01-31 1985-07-12 Eigenmann Ludwig Perfezionamento ai materiali retroriflettenti(catarifrangenti)per segnaletica stradale orizzontale,e procedimento per la loro fabbricazione
IT1097474B (it) * 1978-07-05 1985-08-31 Eigenmann Ludwig Elementi retroriflettenti perfezionati per segnaletica stradale,e metodo per il loro orientamento e posa in opera
DE3528044A1 (de) * 1985-08-05 1987-02-26 Karin Elke Hildmann Reflektionskoerper
US4678695A (en) * 1985-12-23 1987-07-07 Minnesota Mining And Manufacturing Company Encapsulated flattop retroreflective sheeting and method for producing the same
US4907360A (en) * 1987-07-30 1990-03-13 Macmunn William G Three-dimensional signage
US4889409A (en) * 1988-02-16 1989-12-26 Ball Corporation Hemispherical retroreflector
CH680468A5 (cs) * 1989-08-23 1992-08-31 Gautschi Electro Fours Sa
DE19521847A1 (de) * 1995-06-16 1996-12-19 Gerhard Cammann Verfahren und Einrichtung zur Herstellung von lichtreflektierenden Bausteinen, von lichtreflektierenden Flächen wie Straßenmarkierungen, Randstreifen, Mittelstreifen oder dergleichen
AU1583497A (en) * 1996-05-03 1997-11-26 D. Swarovski & Co Decorative device for an article of clothing
JP3663601B2 (ja) * 2002-12-25 2005-06-22 是人 丸井 反射部品

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB405471A (en) * 1932-03-04 1934-02-08 Gustave Leray High intensity reflector
GB773881A (en) * 1953-12-15 1957-05-01 William Guyatt Ward Improvements in or relating to optical reflectors
US3036928A (en) * 1959-12-18 1962-05-29 Cataphote Corp Retroreflective composition and method of applying same
US3237331A (en) * 1963-04-03 1966-03-01 Jr Edwin R Gill Sign construction
US3556637A (en) * 1968-06-27 1971-01-19 Minnesota Mining & Mfg Reflex-reflecting aggregate and markers prepared therefrom
IT1009505B (it) * 1971-07-10 1976-12-20 Eigenmann Ludwig Perfezionamento ai materiali catari frangenti in particolare per segna letica orizzontale e verticale car telli indicatori e simili e relati vi materiali catarifrangenti perfe zionati

Also Published As

Publication number Publication date
IT993807B (it) 1975-09-30
ES205543U (es) 1976-02-01
NO743104L (cs) 1975-03-24
GB1443618A (en) 1976-07-21
NO137602B (no) 1977-12-12
NO137602C (no) 1978-03-21
US3981557A (en) 1976-09-21
FR2242519B1 (cs) 1982-05-07
ES205543Y (es) 1976-06-01
FI251774A7 (cs) 1975-03-01
DE2441491A1 (de) 1975-03-06
FR2242519A1 (cs) 1975-03-28
JPS5074398A (cs) 1975-06-19

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