GB1304149A - - Google Patents

Info

Publication number
GB1304149A
GB1304149A GB3667971A GB3667971A GB1304149A GB 1304149 A GB1304149 A GB 1304149A GB 3667971 A GB3667971 A GB 3667971A GB 3667971 A GB3667971 A GB 3667971A GB 1304149 A GB1304149 A GB 1304149A
Authority
GB
United Kingdom
Prior art keywords
conductors
lamps
pair
push button
frame
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
GB3667971A
Other languages
English (en)
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 filed Critical
Publication of GB1304149A publication Critical patent/GB1304149A/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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Push-Button Switches (AREA)
GB3667971A 1970-08-04 1971-08-04 Expired GB1304149A (https=)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1172170A CH527478A (de) 1970-08-04 1970-08-04 Datenanzeigevorrichtung mit einer Dateneingabetastatur

Publications (1)

Publication Number Publication Date
GB1304149A true GB1304149A (https=) 1973-01-24

Family

ID=4376247

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3667971A Expired GB1304149A (https=) 1970-08-04 1971-08-04

Country Status (4)

Country Link
CH (1) CH527478A (https=)
DE (1) DE2138823A1 (https=)
FR (1) FR2103904A5 (https=)
GB (1) GB1304149A (https=)

Also Published As

Publication number Publication date
FR2103904A5 (https=) 1972-04-14
CH527478A (de) 1972-08-31
DE2138823A1 (de) 1972-02-10

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Legal Events

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