GB794670A - Improvements in or relating to refractor members for lighting fittings - Google Patents
Improvements in or relating to refractor members for lighting fittingsInfo
- Publication number
- GB794670A GB794670A GB14642/55A GB1464255A GB794670A GB 794670 A GB794670 A GB 794670A GB 14642/55 A GB14642/55 A GB 14642/55A GB 1464255 A GB1464255 A GB 1464255A GB 794670 A GB794670 A GB 794670A
- Authority
- GB
- United Kingdom
- Prior art keywords
- flutes
- angle
- prisms
- light
- group
- 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
Links
Classifications
-
- 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
- F21V5/00—Refractors for light sources
Abstract
794,670. Light refractors. GENERAL ELECTRIC CO., Ltd. May 1, 1956 '[May 20, 1955], No. 14642/55. Class 75(2) In a transparent refractor member of the kind having the form of part or whole of a surface of revolution, carrying light directing elements in radial planes containing the axis of revolution and designed to produce from an azimuthally symmetrical light distribution from a light source S on the axis and emergent light distribution which is azimuthally asymmetrical having a maximum intensity in a preferred radial plane Pl and falling off in intensity on either side thereof without discontinuities, the light directing members consist of elements which spread the light without changing its mean direction and extend over an azimuthal angle of at least sixty degrees on each side of the preferred radial plane P1, the angle of spread being least for the elements near the preferred plane P1 and increasing with increase of azimuthal angle therefrom. The refractor member shown is of bowl shape having frustoconical sides and the light directing elements are flutes arranged in two sets svmmetrical about the diametral plane X-X, each set containing seven groups 1...7 and each group having flutes of the same angle of spread. The angle of spread of the flutes of a group is determined in accordance with the formula D = 2 f# where f is not greater than unit y and # is the azimuth angle for the central flute of the group measured from the preferred plane P1. The angular width of a group does not exceed #/f where # is the angle subtended at the centre of the group by the light source. The flutes may be replaced by prisms positioned so that the incident rays are divided equally on the two working faces of the prisms. The flutes or prisms may be on the inside or the outside of the bowl. The surface opposite the flutes or prisms may have parallel rows of prisms in planes perpendicular to the axis of revolution of the bowl. Specification 424,800 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB14642/55A GB794670A (en) | 1955-05-20 | 1955-05-20 | Improvements in or relating to refractor members for lighting fittings |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB14642/55A GB794670A (en) | 1955-05-20 | 1955-05-20 | Improvements in or relating to refractor members for lighting fittings |
Publications (1)
Publication Number | Publication Date |
---|---|
GB794670A true GB794670A (en) | 1958-05-07 |
Family
ID=10044937
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB14642/55A Expired GB794670A (en) | 1955-05-20 | 1955-05-20 | Improvements in or relating to refractor members for lighting fittings |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB794670A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7942559B2 (en) | 2006-02-27 | 2011-05-17 | Cooper Technologies Company | LED device for wide beam generation |
US8256919B2 (en) | 2008-12-03 | 2012-09-04 | Illumination Management Solutions, Inc. | LED replacement lamp and a method of replacing preexisting luminaires with LED lighting assemblies |
US8388198B2 (en) | 2010-09-01 | 2013-03-05 | Illumination Management Solutions, Inc. | Device and apparatus for efficient collection and re-direction of emitted radiation |
US8430538B2 (en) | 2007-05-21 | 2013-04-30 | Illumination Management Solutions, Inc. | LED device for wide beam generation and method of making the same |
US8434912B2 (en) | 2006-02-27 | 2013-05-07 | Illumination Management Solutions, Inc. | LED device for wide beam generation |
US8454205B2 (en) | 2008-08-14 | 2013-06-04 | Cooper Technologies Company | LED devices for offset wide beam generation |
US8545049B2 (en) | 2009-11-25 | 2013-10-01 | Cooper Technologies Company | Systems, methods, and devices for sealing LED light sources in a light module |
US9052086B2 (en) | 2011-02-28 | 2015-06-09 | Cooper Technologies Company | Method and system for managing light from a light emitting diode |
US9080739B1 (en) | 2012-09-14 | 2015-07-14 | Cooper Technologies Company | System for producing a slender illumination pattern from a light emitting diode |
US9140430B2 (en) | 2011-02-28 | 2015-09-22 | Cooper Technologies Company | Method and system for managing light from a light emitting diode |
US9200765B1 (en) | 2012-11-20 | 2015-12-01 | Cooper Technologies Company | Method and system for redirecting light emitted from a light emitting diode |
-
1955
- 1955-05-20 GB GB14642/55A patent/GB794670A/en not_active Expired
Cited By (32)
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---|---|---|---|---|
US10174908B2 (en) | 2006-02-27 | 2019-01-08 | Eaton Intelligent Power Limited | LED device for wide beam generation |
US8434912B2 (en) | 2006-02-27 | 2013-05-07 | Illumination Management Solutions, Inc. | LED device for wide beam generation |
US8210722B2 (en) | 2006-02-27 | 2012-07-03 | Cooper Technologies Company | LED device for wide beam generation |
US9388949B2 (en) | 2006-02-27 | 2016-07-12 | Illumination Management Solutions, Inc. | LED device for wide beam generation |
US8511864B2 (en) | 2006-02-27 | 2013-08-20 | Illumination Management Solutions | LED device for wide beam generation |
US8414161B2 (en) | 2006-02-27 | 2013-04-09 | Cooper Technologies Company | LED device for wide beam generation |
US7942559B2 (en) | 2006-02-27 | 2011-05-17 | Cooper Technologies Company | LED device for wide beam generation |
US8905597B2 (en) | 2006-02-27 | 2014-12-09 | Illumination Management Solutions, Inc. | LED device for wide beam generation |
US9297520B2 (en) | 2006-02-27 | 2016-03-29 | Illumination Management Solutions, Inc. | LED device for wide beam generation |
US7993036B2 (en) | 2006-02-27 | 2011-08-09 | Illumination Management Solutions, Inc. | LED device for wide beam generation |
US9482394B2 (en) | 2007-05-21 | 2016-11-01 | Illumination Management Solutions, Inc. | LED device for wide beam generation and method of making the same |
US8777457B2 (en) | 2007-05-21 | 2014-07-15 | Illumination Management Solutions, Inc. | LED device for wide beam generation and method of making the same |
US8430538B2 (en) | 2007-05-21 | 2013-04-30 | Illumination Management Solutions, Inc. | LED device for wide beam generation and method of making the same |
US10222030B2 (en) | 2008-08-14 | 2019-03-05 | Cooper Technologies Company | LED devices for offset wide beam generation |
US10400996B2 (en) | 2008-08-14 | 2019-09-03 | Eaton Intelligent Power Limited | LED devices for offset wide beam generation |
US9297517B2 (en) | 2008-08-14 | 2016-03-29 | Cooper Technologies Company | LED devices for offset wide beam generation |
US10976027B2 (en) | 2008-08-14 | 2021-04-13 | Signify Holding B.V. | LED devices for offset wide beam generation |
US8454205B2 (en) | 2008-08-14 | 2013-06-04 | Cooper Technologies Company | LED devices for offset wide beam generation |
US8783900B2 (en) | 2008-12-03 | 2014-07-22 | Illumination Management Solutions, Inc. | LED replacement lamp and a method of replacing preexisting luminaires with LED lighting assemblies |
US8256919B2 (en) | 2008-12-03 | 2012-09-04 | Illumination Management Solutions, Inc. | LED replacement lamp and a method of replacing preexisting luminaires with LED lighting assemblies |
US9052070B2 (en) | 2009-11-25 | 2015-06-09 | Cooper Technologies Company | Systems, methods, and devices for sealing LED light sources in a light module |
US8545049B2 (en) | 2009-11-25 | 2013-10-01 | Cooper Technologies Company | Systems, methods, and devices for sealing LED light sources in a light module |
US9109781B2 (en) | 2010-09-01 | 2015-08-18 | Illumination Management Solutions, Inc. | Device and apparatus for efficient collection and re-direction of emitted radiation |
US8727573B2 (en) | 2010-09-01 | 2014-05-20 | Cooper Technologies Company | Device and apparatus for efficient collection and re-direction of emitted radiation |
US8388198B2 (en) | 2010-09-01 | 2013-03-05 | Illumination Management Solutions, Inc. | Device and apparatus for efficient collection and re-direction of emitted radiation |
US9140430B2 (en) | 2011-02-28 | 2015-09-22 | Cooper Technologies Company | Method and system for managing light from a light emitting diode |
US9435510B2 (en) | 2011-02-28 | 2016-09-06 | Cooper Technologies Company | Method and system for managing light from a light emitting diode |
US9458983B2 (en) | 2011-02-28 | 2016-10-04 | Cooper Technologies Company | Method and system for managing light from a light emitting diode |
US9574746B2 (en) | 2011-02-28 | 2017-02-21 | Cooper Technologies Company | Method and system for managing light from a light emitting diode |
US9052086B2 (en) | 2011-02-28 | 2015-06-09 | Cooper Technologies Company | Method and system for managing light from a light emitting diode |
US9080739B1 (en) | 2012-09-14 | 2015-07-14 | Cooper Technologies Company | System for producing a slender illumination pattern from a light emitting diode |
US9200765B1 (en) | 2012-11-20 | 2015-12-01 | Cooper Technologies Company | Method and system for redirecting light emitted from a light emitting diode |
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