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GB649063A - Improvements relating to light units for use in light signals or indicators - Google Patents

Improvements relating to light units for use in light signals or indicators

Info

Publication number
GB649063A
GB649063A GB2058648A GB2058648A GB649063A GB 649063 A GB649063 A GB 649063A GB 2058648 A GB2058648 A GB 2058648A GB 2058648 A GB2058648 A GB 2058648A GB 649063 A GB649063 A GB 649063A
Authority
GB
United Kingdom
Prior art keywords
light
rod
focus
reflector
rods
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
GB2058648A
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.)
Siemens Mobility Ltd
Original Assignee
Westinghouse Brake and Signal 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
Priority to NL71951D priority Critical patent/NL71951C/xx
Application filed by Westinghouse Brake and Signal Co Ltd filed Critical Westinghouse Brake and Signal Co Ltd
Priority to GB2058648A priority patent/GB649063A/en
Publication of GB649063A publication Critical patent/GB649063A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
    • A61B1/0661—Endoscope light sources
    • A61B1/0669—Endoscope light sources at proximal end of an endoscope
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
    • A61B1/07—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements using light-conductive means, e.g. optical fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
    • B61L5/12—Visible signals
    • B61L5/18—Light signals; Mechanisms associated therewith, e.g. blinders
    • B61L5/1809—Daylight signals
    • B61L5/1827—Daylight signals using light sources of different colours and a common optical system
    • 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
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0005—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type
    • G02B6/0006—Coupling light into the fibre
    • 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
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
    • 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
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
    • 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
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4202—Packages, e.g. shape, construction, internal or external details for coupling an active element with fibres without intermediate optical elements, e.g. fibres with plane ends, fibres with shaped ends, bundles
    • G02B6/4203—Optical features
    • 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
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4298—Coupling light guides with opto-electronic elements coupling with non-coherent light sources and/or radiation detectors, e.g. lamps, incandescent bulbs, scintillation chambers
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/095—Traffic lights
    • 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
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/3616—Holders, macro size fixtures for mechanically holding or positioning fibres, e.g. on an optical bench
    • G02B6/3624—Fibre head, e.g. fibre probe termination
    • 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
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/3628—Mechanical coupling means for mounting fibres to supporting carriers
    • G02B6/3632—Mechanical coupling means for mounting fibres to supporting carriers characterised by the cross-sectional shape of the mechanical coupling means
    • G02B6/3644—Mechanical coupling means for mounting fibres to supporting carriers characterised by the cross-sectional shape of the mechanical coupling means the coupling means being through-holes or wall apertures

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Radiology & Medical Imaging (AREA)
  • General Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Biophysics (AREA)
  • Veterinary Medicine (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Public Health (AREA)
  • Mechanical Engineering (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

649,063. Railway signals. WESTING - HOUSE BRAKE & SIGNAL CO., Ltd., PETER, L. H., SHEPPARD, E. A., and STEVENS, S. A. Aug. 4, 1948, No. 20586. [Class 105] [Also in Groups XI and XXXVIII] A light unit for light signals or indicators comprises two or more sources of light and a single light guide conveying light from the sources by internal reflection and emitting it at the end thereof. The single light guide comprises a rod 1 of transparent material and three tributary rods 5 of similar material formed integral or held detachably in abutting contact with the rod 1. Each of the tributary rods 5 is connected to a lamp housing 6 in each of which a filter 8 colours the light before it enters the associated rod 5 ; reflectors may be employed in the lamp housing to concentrate the light on to the ends of the rods 5. The lamps are controlled in accordance with traffic conditions to supply light of correct colour to the light guide, which light is emitted by the end 3 of the rod 1 remote from the tributary rods 5. This end 3 is positioned at the focus of a concave reflector 9 which directs the diverging rays from the rod into a parallel beam. The end 3 may be shaped as a truncated cone as shown or in the form of a bead ; or it may have facetted surfaces. In another embodiment, Fig. 2 (not shown), the rod 1 passes through a central aperture in the beam forming reflector and the rod end is made bulbous with its tip formed concave and made reflecting to present to the guided light a convex reflecting surface with focus at the focus of the reflector. Instead of using a reflector to form a beam, the light emitted by the rod may be concentrated by a lens system, in which case the rod end is located at the focus of the system ; or alternatively the rod end may itself constitute a lens by being flared in conical manner and having its end surface of lens contour. Fig. 4 shows the invention applied as a indicator signal on a control panel 15. The rod 1 extends through an aperture in the panel and has a domed end positioned to coincide with the appropriate part of a light signal engraved on the panel front. Part of the surface of the light conducting rod may be silvered to prevent loss of light. According to the Provisional Specification two of the filters 8 may be of the same colour, e.g. so that one may act as a standby.
GB2058648A 1948-08-04 1948-08-04 Improvements relating to light units for use in light signals or indicators Expired GB649063A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL71951D NL71951C (en) 1948-08-04
GB2058648A GB649063A (en) 1948-08-04 1948-08-04 Improvements relating to light units for use in light signals or indicators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2058648A GB649063A (en) 1948-08-04 1948-08-04 Improvements relating to light units for use in light signals or indicators

Publications (1)

Publication Number Publication Date
GB649063A true GB649063A (en) 1951-01-17

Family

ID=10148367

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2058648A Expired GB649063A (en) 1948-08-04 1948-08-04 Improvements relating to light units for use in light signals or indicators

Country Status (2)

Country Link
GB (1) GB649063A (en)
NL (1) NL71951C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2127949A (en) * 1982-09-28 1984-04-18 American Sterilizer Co Illuminating device
EP0833174A2 (en) * 1996-09-30 1998-04-01 Bridgestone Corporation Light transmission system with branched light guide
WO2012068603A1 (en) * 2010-11-23 2012-05-31 Swarco Futurit Verkehrssignalsysteme Ges.M.B.H. Color-mixing convergent optical system
WO2014041081A1 (en) * 2012-09-14 2014-03-20 Thales Deutschland Gmbh Optical system for use in a traffic light luminaire

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2127949A (en) * 1982-09-28 1984-04-18 American Sterilizer Co Illuminating device
EP0833174A2 (en) * 1996-09-30 1998-04-01 Bridgestone Corporation Light transmission system with branched light guide
EP0833174A3 (en) * 1996-09-30 1998-11-25 Bridgestone Corporation Light transmission system with branched light guide
WO2012068603A1 (en) * 2010-11-23 2012-05-31 Swarco Futurit Verkehrssignalsysteme Ges.M.B.H. Color-mixing convergent optical system
US9268078B2 (en) 2010-11-23 2016-02-23 Swarco Futurit Verkehssignalsysteme GES.M.B.H. Color-mixing convergent optical system
WO2014041081A1 (en) * 2012-09-14 2014-03-20 Thales Deutschland Gmbh Optical system for use in a traffic light luminaire

Also Published As

Publication number Publication date
NL71951C (en)

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