GB1201980A - Improvements in apparatus for the production of light beams - Google Patents

Improvements in apparatus for the production of light beams

Info

Publication number
GB1201980A
GB1201980A GB6144668A GB6144668A GB1201980A GB 1201980 A GB1201980 A GB 1201980A GB 6144668 A GB6144668 A GB 6144668A GB 6144668 A GB6144668 A GB 6144668A GB 1201980 A GB1201980 A GB 1201980A
Authority
GB
United Kingdom
Prior art keywords
filter
sources
beams
filters
light
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
GB6144668A
Inventor
Michel Camille Berger
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
Priority to GB6144668A priority Critical patent/GB1201980A/en
Publication of GB1201980A publication Critical patent/GB1201980A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/08—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing coloured light, e.g. monochromatic; for reducing intensity of light
    • 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

Abstract

1,201,980. Lamps. M. C. BERGER. 24 Dec., 1968, No. 61446/68. Heading F4R. A lamp adapted to emit a beam of variable colour comprises a casing 3 containing at least two light sources 4, 5 producing orthogonal beams of different colours and a dichroic filter or half-silvered mirror 8 bisecting the angle between the beams so that light from either or both of the sources is projected through a fresnel lens 12. The sources may have respective coloured filters 6, 7 or may consist of coloured bulbs, and current is supplied to the sources by a rotary switch 15 driven by a synchronous motor 16. The lamp is suitable as a traffic or pedestrian signal, the main beams being red and green, respectively, and the combined beam being orange or yellow and cf an intensity double that of the constituent beams. Cut-out letters 13 forming the word "STOP" are illuminated by the bulb 5 through a red filter 14. In a modification (Fig. 8, not shown) a third (blue) source (51) is located opposite the source (5) and a second dichroic filter or half-silvered mirror (53) is disposed perpendicular to the filter (8), the two filters being so constructed that light from any one of the sources or any combination thereof can be emitted. The filter (53) is made in two parts which are secured by adhesive to opposite sides of the filter (8), and a ground glass screen (56) is fitted adjacent the lens (12). The dichroic filters may consist of transparent plates coated with molybdenum or cobalt.
GB6144668A 1968-12-24 1968-12-24 Improvements in apparatus for the production of light beams Expired GB1201980A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB6144668A GB1201980A (en) 1968-12-24 1968-12-24 Improvements in apparatus for the production of light beams

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB6144668A GB1201980A (en) 1968-12-24 1968-12-24 Improvements in apparatus for the production of light beams

Publications (1)

Publication Number Publication Date
GB1201980A true GB1201980A (en) 1970-08-12

Family

ID=10487050

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6144668A Expired GB1201980A (en) 1968-12-24 1968-12-24 Improvements in apparatus for the production of light beams

Country Status (1)

Country Link
GB (1) GB1201980A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2628823A1 (en) * 1988-03-17 1989-09-22 Cna Cie Nle Autorupteur Projection lamp has a parabolic reflector and polyacrylic deflector - for enhanced electro=optical efficiency and reduced weight for directional illumination beacon or signal lamps

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2628823A1 (en) * 1988-03-17 1989-09-22 Cna Cie Nle Autorupteur Projection lamp has a parabolic reflector and polyacrylic deflector - for enhanced electro=optical efficiency and reduced weight for directional illumination beacon or signal lamps

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees