GB399669A - Improvements in illuminated signs - Google Patents

Improvements in illuminated signs

Info

Publication number
GB399669A
GB399669A GB33469/32A GB3346932A GB399669A GB 399669 A GB399669 A GB 399669A GB 33469/32 A GB33469/32 A GB 33469/32A GB 3346932 A GB3346932 A GB 3346932A GB 399669 A GB399669 A GB 399669A
Authority
GB
United Kingdom
Prior art keywords
tube
plate
etched
glass
plates
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
GB33469/32A
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Publication of GB399669A publication Critical patent/GB399669A/en
Expired legal-status Critical Current

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
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—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 planar or of plate-like form
    • G02B6/0065—Manufacturing aspects; Material aspects
    • 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
    • G02B6/0011—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 planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • 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
    • G02B6/0011—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 planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G02B6/006—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to produce indicia, symbols, texts or the like
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/18—Edge-illuminated signs
    • G09F2013/1804—Achieving homogeneous illumination
    • G09F2013/1831—Achieving homogeneous illumination using more than one light source

Abstract

399,669. Electric discharge tube signs; changing-signs. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London. -(Assignees of Patent-Treuhand Ges. f³r Elektrische Gl³hlampen; 11, Ehrenbergstrasse, Berlin.) Nov. 25, 1932, No. 33469. Convention date, Dec. 18, 1931. [Classes 3 (i) and 3 (ii).] A sign of the kind in which the inscription is etched on a plate of transparent material illuminated edgewise, comprises a plurality of electric discharge tubes arranged parallel to one another in one or more pairs and one or more plates of glass or like material, having inscriptions etched thereon, adapted to be readily inserted between or removed from any of the pairs of the discharge tubes. As shown, glass plates 1, having letters 2 etched thereon and backed by a dark-coloured plate 3, are illuminated by discharge tubes 6, the electrodes being housed in extensions 7 of boxes 8 housing the transformers &c. Each tube may be enclosed in a non-transparent hood so that no light is received from it except that entering the plates edgewise. Instead of the plate 3, each plate 1 may be provided with a darkcoloured coating on the back. In a modification two sets of glass plates are arranged backto-back with a non-transparent plate therebetween. The tubes may be flashed and adapted to emit light of different colours. The colour of the light emitted by each tube may be varied over its length either by arranging different coloured pieces of glass contiguously along its length or by providing coloured coverings at intervals, or where the tube has a filling of gases and metal vapours, by making the tube of varying cross-section. Each tube may be divided along its length by a helical wall into two chambers provided with electrodes and having different fillings.
GB33469/32A 1931-12-18 1932-11-25 Improvements in illuminated signs Expired GB399669A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE399669X 1931-12-18

Publications (1)

Publication Number Publication Date
GB399669A true GB399669A (en) 1933-10-12

Family

ID=6397504

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33469/32A Expired GB399669A (en) 1931-12-18 1932-11-25 Improvements in illuminated signs

Country Status (1)

Country Link
GB (1) GB399669A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2314962A (en) * 1996-07-03 1998-01-14 Geoffrey David Fairfield Display lighting apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2314962A (en) * 1996-07-03 1998-01-14 Geoffrey David Fairfield Display lighting apparatus
GB2314962B (en) * 1996-07-03 2000-07-12 Geoffrey David Fairfield Display lighting apparatus (Flat Panel)

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