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GB1173408A - Directional Control Device for a Source of Light - Google Patents

Directional Control Device for a Source of Light

Info

Publication number
GB1173408A
GB1173408A GB24639/68A GB2463968A GB1173408A GB 1173408 A GB1173408 A GB 1173408A GB 24639/68 A GB24639/68 A GB 24639/68A GB 2463968 A GB2463968 A GB 2463968A GB 1173408 A GB1173408 A GB 1173408A
Authority
GB
United Kingdom
Prior art keywords
light
transparent
zones
projections
panel
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
GB24639/68A
Inventor
Bo Anders Vilhelm Hagner
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
Publication of GB1173408A publication Critical patent/GB1173408A/en
Expired legal-status Critical Current

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
    • F21V3/00—Globes; Bowls; Cover glasses
    • 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
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • 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
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/02—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages with provision for adjustment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

1,173,408. Lamp fitting. B. A. V. HAGNER. 23 May, 1968 [31 May, 1967], No. 24639/68. Heading F4R. A method for the directional control of a source of light in the form of one or more fluorescent tubes comprises positioning in the path of the light source a panel structure consisting of a facia panel having projections in the form of segments of a cylinder which extend parallel to the axis of said tube or tubes in combination with a support sheet having a plurality of light deflecting and transparent zones in the form of strips extending in the same direction as that of the projections, and adjusting in a direction parallel to the plane of the facia panel the relative positions of said zones and said projections, whereby light beams passing through the transparent zones will, on striking the projections, be deflected and be projected out of the structure in a concentrated manner and at a predetermined angle. The transparent zones 4 are provided on a transparent plastics member 5 which may lie adjacent the facia panel 1 having cylindrical segments 2 or be separated from it by a small air-gap. The transparent zones 4 are arranged in relation to corresponding segments 2 so that all light passing through one zone reaches only the corresponding projection. The upper surface of the light deflecting zones 3 should preferably be white or light-reflecting whilst the lower surface is black. This may be achieved by painting, metallizing, screen printing or roughening the surface of 5. The zones 3 may however be translucent rather than opaque and transmit light of one colour, e.g. blue. The transparent zone 4 may not be symmetrical with respect to the segment 2 but asymmetric thereby producing an asymmetric light distribution. A complete lamp housing is exemplified (Figs. 5 and 6, not shown) wherein a plurality of fluorescent tubes (7) are enclosed in a housing (6) having a transparent member (5) adjacent panel 1 and thumb screws (9, 11) to adjust the horizontal and vertical setting of the transparent member.
GB24639/68A 1967-05-31 1968-05-23 Directional Control Device for a Source of Light Expired GB1173408A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE762267 1967-05-31

Publications (1)

Publication Number Publication Date
GB1173408A true GB1173408A (en) 1969-12-10

Family

ID=20271860

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24639/68A Expired GB1173408A (en) 1967-05-31 1968-05-23 Directional Control Device for a Source of Light

Country Status (4)

Country Link
CH (1) CH490639A (en)
DE (1) DE1772529A1 (en)
FR (1) FR1563590A (en)
GB (1) GB1173408A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1635111A3 (en) * 2004-09-13 2008-10-15 GmbH + Co. KG BöSha Transparent covers for explosion-proof luminaires

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004145A (en) * 1975-02-24 1977-01-18 Ignacio Goytisolo Taltavull Nil-luminance lighting panel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1635111A3 (en) * 2004-09-13 2008-10-15 GmbH + Co. KG BöSha Transparent covers for explosion-proof luminaires

Also Published As

Publication number Publication date
FR1563590A (en) 1969-04-11
CH490639A (en) 1970-05-15
DE1772529A1 (en) 1971-07-15

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Legal Events

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