IT1019363B - IMPROVEMENT IN THE OPTICAL SIGNALING UNITS, IN PARTICULAR FOR TRAFFIC LIGHTS AND SIMILAR - Google Patents

IMPROVEMENT IN THE OPTICAL SIGNALING UNITS, IN PARTICULAR FOR TRAFFIC LIGHTS AND SIMILAR

Info

Publication number
IT1019363B
IT1019363B IT53155/74A IT5315574A IT1019363B IT 1019363 B IT1019363 B IT 1019363B IT 53155/74 A IT53155/74 A IT 53155/74A IT 5315574 A IT5315574 A IT 5315574A IT 1019363 B IT1019363 B IT 1019363B
Authority
IT
Italy
Prior art keywords
improvement
similar
traffic lights
optical signaling
signaling units
Prior art date
Application number
IT53155/74A
Other languages
Italian (it)
Original Assignee
Minnesota Mining & Mfg
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 Minnesota Mining & Mfg filed Critical Minnesota Mining & Mfg
Application granted granted Critical
Publication of IT1019363B publication Critical patent/IT1019363B/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • 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
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/02—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using parallel laminae or strips, e.g. of Venetian-blind type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
    • F21W2111/02—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00 for roads, paths or the like

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Traffic Control Systems (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
IT53155/74A 1973-09-24 1974-09-23 IMPROVEMENT IN THE OPTICAL SIGNALING UNITS, IN PARTICULAR FOR TRAFFIC LIGHTS AND SIMILAR IT1019363B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US400253A US3894228A (en) 1973-09-24 1973-09-24 Light control device

Publications (1)

Publication Number Publication Date
IT1019363B true IT1019363B (en) 1977-11-10

Family

ID=23582844

Family Applications (1)

Application Number Title Priority Date Filing Date
IT53155/74A IT1019363B (en) 1973-09-24 1974-09-23 IMPROVEMENT IN THE OPTICAL SIGNALING UNITS, IN PARTICULAR FOR TRAFFIC LIGHTS AND SIMILAR

Country Status (5)

Country Link
US (1) US3894228A (en)
JP (1) JPS5060244A (en)
DE (1) DE2445365A1 (en)
FR (1) FR2245001A1 (en)
IT (1) IT1019363B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2462721A1 (en) * 1979-07-30 1981-02-13 Radiall Sa DEVICE FOR ADJUSTING THE LEVEL OF THE LIGHT POWER EMITTED AT THE END OF AN OPTICAL FIBER
DE3605000A1 (en) * 1985-02-22 1986-09-04 Sharp Kk LIGHTING DEVICE
USRE40227E1 (en) 1985-11-21 2008-04-08 3M Innovative Properties Company Totally internally reflecting thin, flexible film
JPS6413609U (en) * 1987-07-10 1989-01-24
JP2574121Y2 (en) * 1991-12-27 1998-06-11 株式会社ニフコ Parts fixing device to wall material
US5475533A (en) * 1993-08-02 1995-12-12 Applied Physics Research, L.P. Apparatus for enhancing the brightness of an image and method of making the same
CH690657A5 (en) * 1993-12-01 2000-11-30 Olga Raimondi Staeuble A directional filter for the light fittings.
JPH10276131A (en) * 1997-03-28 1998-10-13 Victor Co Of Japan Ltd Optical transmission and reception device
DK1869362T3 (en) 2005-04-12 2020-12-21 Planmeca Oy OPERATING LIGHT, NAMELY FOR DENTAL TREATMENT

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1664536A (en) * 1926-08-24 1928-04-03 Newton S Bement Traffic light
US2540389A (en) * 1946-02-21 1951-02-06 Elwood Wiles Signal light ray director
US2539927A (en) * 1948-10-30 1951-01-30 Ramminger William Antiglare headlight
US2683799A (en) * 1951-05-10 1954-07-13 Day Brite Lighting Inc Electric lighting fixture with louver members
US3275820A (en) * 1963-12-26 1966-09-27 Joseph M Szarkowski Illuminating system
US3543235A (en) * 1969-05-19 1970-11-24 Gulf & Western Industries Adjustable light beam director having removable verticle baffles
US3618014A (en) * 1969-08-27 1971-11-02 Minnesota Mining & Mfg Variable indication control signal

Also Published As

Publication number Publication date
US3894228A (en) 1975-07-08
DE2445365A1 (en) 1975-03-27
JPS5060244A (en) 1975-05-24
FR2245001A1 (en) 1975-04-18

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