GB1023595A - Improvements in or relating to dial illumination - Google Patents

Improvements in or relating to dial illumination

Info

Publication number
GB1023595A
GB1023595A GB286964A GB286964A GB1023595A GB 1023595 A GB1023595 A GB 1023595A GB 286964 A GB286964 A GB 286964A GB 286964 A GB286964 A GB 286964A GB 1023595 A GB1023595 A GB 1023595A
Authority
GB
United Kingdom
Prior art keywords
dial
source
relating
dial illumination
reflector
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
GB286964A
Inventor
William Hegarty
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.)
Saunders Roe and Nuclear Enterprises Ltd
Original Assignee
Saunders Roe and Nuclear Enterprises 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 Saunders Roe and Nuclear Enterprises Ltd filed Critical Saunders Roe and Nuclear Enterprises Ltd
Priority to GB286964A priority Critical patent/GB1023595A/en
Priority to DE1965S0051250 priority patent/DE1912543U/en
Publication of GB1023595A publication Critical patent/GB1023595A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/22—Illumination; Arrangements for improving the visibility of characters on dials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
    • H01J65/08—Lamps in which a screen or coating is excited to luminesce by radioactive material located inside the vessel

Abstract

A self-luminous light source, e.g. tritium-excited zinc sulphide, is mounted at the optical centre of a curved reflector, to provide dial illumination, e.g. in a telephone dial. Light from the source may be reflected on to a diffusing surface, to illuminate the characters of the dial. The source may be mounted in a pad of clear, silicone rubber, part of whose surface is aluminized to form the reflector.
GB286964A 1964-01-22 1964-01-22 Improvements in or relating to dial illumination Expired GB1023595A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB286964A GB1023595A (en) 1964-01-22 1964-01-22 Improvements in or relating to dial illumination
DE1965S0051250 DE1912543U (en) 1964-01-22 1965-01-05 SCALE LIGHTING.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB286964A GB1023595A (en) 1964-01-22 1964-01-22 Improvements in or relating to dial illumination

Publications (1)

Publication Number Publication Date
GB1023595A true GB1023595A (en) 1966-03-23

Family

ID=9747529

Family Applications (1)

Application Number Title Priority Date Filing Date
GB286964A Expired GB1023595A (en) 1964-01-22 1964-01-22 Improvements in or relating to dial illumination

Country Status (2)

Country Link
DE (1) DE1912543U (en)
GB (1) GB1023595A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1195672A (en) 1968-02-01 1970-06-17 Mobil Oil Corp Novel Urea Derivatives and Herbicides containing the same

Also Published As

Publication number Publication date
DE1912543U (en) 1965-03-25

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