GB494495A - Improvements in or relating to lighting apparatus - Google Patents

Improvements in or relating to lighting apparatus

Info

Publication number
GB494495A
GB494495A GB1111238A GB1111238A GB494495A GB 494495 A GB494495 A GB 494495A GB 1111238 A GB1111238 A GB 1111238A GB 1111238 A GB1111238 A GB 1111238A GB 494495 A GB494495 A GB 494495A
Authority
GB
United Kingdom
Prior art keywords
casing
light
filters
relating
lighting apparatus
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
GB1111238A
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.)
AUGUSTE BIOSSE DUPLAN
RENE TOUSSAINT
Original Assignee
AUGUSTE BIOSSE DUPLAN
RENE TOUSSAINT
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 AUGUSTE BIOSSE DUPLAN, RENE TOUSSAINT filed Critical AUGUSTE BIOSSE DUPLAN
Priority to GB1111238A priority Critical patent/GB494495A/en
Publication of GB494495A publication Critical patent/GB494495A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/02—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for simulating daylight

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

494,495. Daylight lamps. DUPLAN, A. BIOSSE-, and TOUSSAINT, R. April 11, 1938, No. 11112. [Class 75 (iv)] A daylight lamp comprises a source of light A disposed within a casing E and co-operating with a reflector (not shown), the light-emitting opening in the casing being closed by a plurality of differently coloured filters a, b, c arranged in contact side-by-side on a diffusing plate d of ground or frosted glass. The filters are bichromatic in character and, in one example given, the effective surface of the composite filter is made up of <6>/9 violet-blue, <2>/9 green-yellow, and 1/9 orange-red.
GB1111238A 1938-04-11 1938-04-11 Improvements in or relating to lighting apparatus Expired GB494495A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1111238A GB494495A (en) 1938-04-11 1938-04-11 Improvements in or relating to lighting apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1111238A GB494495A (en) 1938-04-11 1938-04-11 Improvements in or relating to lighting apparatus

Publications (1)

Publication Number Publication Date
GB494495A true GB494495A (en) 1938-10-26

Family

ID=9980256

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1111238A Expired GB494495A (en) 1938-04-11 1938-04-11 Improvements in or relating to lighting apparatus

Country Status (1)

Country Link
GB (1) GB494495A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2836707A (en) * 1954-10-01 1958-05-27 Stitt Charles Monroe Light filter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2836707A (en) * 1954-10-01 1958-05-27 Stitt Charles Monroe Light filter

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