GB774576A - Improvements relating to the illumination of instrument dials - Google Patents

Improvements relating to the illumination of instrument dials

Info

Publication number
GB774576A
GB774576A GB2812152A GB2812152A GB774576A GB 774576 A GB774576 A GB 774576A GB 2812152 A GB2812152 A GB 2812152A GB 2812152 A GB2812152 A GB 2812152A GB 774576 A GB774576 A GB 774576A
Authority
GB
United Kingdom
Prior art keywords
light
electroluminescent
indicia
illumination
pointer
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
GB2812152A
Inventor
Harold Robert Ruff
Maurice George Clarke
Cyril Hubert Walker
Sheila Mary Fernyhough
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB2812152A priority Critical patent/GB774576A/en
Publication of GB774576A publication Critical patent/GB774576A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/30—Illumination of dials or hands
    • G04B19/32—Illumination of dials or hands by luminescent substances

Abstract

774,576. Electroluminescence. BRITISH THOMSON-HOUSTON CO., Ltd. Nov. 6, 1953 [Nov. 7, 1952], No. 28121/52. Class 39(1). Illumination for an instrument dial is provided by a band of electroluminescent material, its light falling on the luminescent dial or indicia and colour filter means, provided e.g., on the cover plate, absorbs any dispersed electroluminescent light but transmits the light from the luminescent material. The pointer 3 and indicia 4 are coated with luminescent material. The electroluminescent cell comprises a transparent conductive coating 8 e.g. aluminium or ion chloride, on electroluminescent layers 9 and a metal coating 10 with spring contact 11 and it is mounted on the upper surface of the cover glass 7 and held there by the flanged cover 5. The filter 12 on the cover glass is of a colour designed to absorb diffused or dispersed light originating from layer 9 and transmit light from the pointer and indicia. Specification 731,677 is referred to.
GB2812152A 1952-11-07 1952-11-07 Improvements relating to the illumination of instrument dials Expired GB774576A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2812152A GB774576A (en) 1952-11-07 1952-11-07 Improvements relating to the illumination of instrument dials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2812152A GB774576A (en) 1952-11-07 1952-11-07 Improvements relating to the illumination of instrument dials

Publications (1)

Publication Number Publication Date
GB774576A true GB774576A (en) 1957-05-15

Family

ID=10270598

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2812152A Expired GB774576A (en) 1952-11-07 1952-11-07 Improvements relating to the illumination of instrument dials

Country Status (1)

Country Link
GB (1) GB774576A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4970400A (en) * 1987-10-02 1990-11-13 Yazaki Corporation Illuminated meter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4970400A (en) * 1987-10-02 1990-11-13 Yazaki Corporation Illuminated meter

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