GB1162560A - Drawing and the like Boards - Google Patents

Drawing and the like Boards

Info

Publication number
GB1162560A
GB1162560A GB5102566A GB5102566A GB1162560A GB 1162560 A GB1162560 A GB 1162560A GB 5102566 A GB5102566 A GB 5102566A GB 5102566 A GB5102566 A GB 5102566A GB 1162560 A GB1162560 A GB 1162560A
Authority
GB
United Kingdom
Prior art keywords
edge
waxbased
engs
elstree
wharton
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
GB5102566A
Inventor
Alexander Horatio Nelson
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.)
Wharton Engineers Elstree Ltd
Original Assignee
Wharton Engineers Elstree 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
Application filed by Wharton Engineers Elstree Ltd filed Critical Wharton Engineers Elstree Ltd
Priority to GB5102566A priority Critical patent/GB1162560A/en
Publication of GB1162560A publication Critical patent/GB1162560A/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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L1/00—Repeatedly-usable boards or tablets for writing or drawing
    • B43L1/004—Repeatedly-usable boards or tablets for writing or drawing with illuminating devices
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

1,162,560. Edge-illuminated sign. WHARTON ENGS. (ELSTREE) Ltd. 13 Feb., 1968 [15 Nov., 1966], No. 51025/66. Heading G5C. A display panel 1 having no permanent markings on it, of the type illuminated along an edge by a light source 14, is backed by a dark metal plate 2 and has some of its edges secured in channelling 3, (4) (see also Fig. 1, not shown) treated to make it light reflective, e.g. by silvering. Inscriptions are applied to the display surface 1 by writing with, e.g. waxbased pencil.
GB5102566A 1966-11-15 1966-11-15 Drawing and the like Boards Expired GB1162560A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5102566A GB1162560A (en) 1966-11-15 1966-11-15 Drawing and the like Boards

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5102566A GB1162560A (en) 1966-11-15 1966-11-15 Drawing and the like Boards

Publications (1)

Publication Number Publication Date
GB1162560A true GB1162560A (en) 1969-08-27

Family

ID=10458341

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5102566A Expired GB1162560A (en) 1966-11-15 1966-11-15 Drawing and the like Boards

Country Status (1)

Country Link
GB (1) GB1162560A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0229863A1 (en) * 1986-01-24 1987-07-29 Franz Johnsen Vinther An illuminated board
US4794492A (en) * 1984-08-07 1988-12-27 Vinther Franz J Illuminated board
GB2244365A (en) * 1990-05-21 1991-11-27 Roland Henry Thomas Information display device
WO2004016068A2 (en) * 2002-08-19 2004-02-26 Selsan Elektronik Ltd. Sti. Illuminious writing board

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4794492A (en) * 1984-08-07 1988-12-27 Vinther Franz J Illuminated board
EP0229863A1 (en) * 1986-01-24 1987-07-29 Franz Johnsen Vinther An illuminated board
GB2244365A (en) * 1990-05-21 1991-11-27 Roland Henry Thomas Information display device
GB2244365B (en) * 1990-05-21 1993-10-06 Roland Henry Thomas Information display device
WO2004016068A2 (en) * 2002-08-19 2004-02-26 Selsan Elektronik Ltd. Sti. Illuminious writing board
WO2004016068A3 (en) * 2002-08-19 2004-03-25 Selsan Elektronik Ltd Sti Illuminious writing board

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee