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GB542695A - Improvements in lighting apparatus and methods of making same - Google Patents

Improvements in lighting apparatus and methods of making same

Info

Publication number
GB542695A
GB542695A GB10586/40A GB1058640A GB542695A GB 542695 A GB542695 A GB 542695A GB 10586/40 A GB10586/40 A GB 10586/40A GB 1058640 A GB1058640 A GB 1058640A GB 542695 A GB542695 A GB 542695A
Authority
GB
United Kingdom
Prior art keywords
light
louvred
scorings
sheet
methods
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
GB10586/40A
Other languages
English (en)
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.)
Mars Petcare US Inc
Original Assignee
Doane Products Corp
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 Doane Products Corp filed Critical Doane Products Corp
Publication of GB542695A publication Critical patent/GB542695A/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
    • F21V5/00—Refractors for light sources
    • 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
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optical Elements Other Than Lenses (AREA)
GB10586/40A 1939-07-08 1940-06-19 Improvements in lighting apparatus and methods of making same Expired GB542695A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US542695XA 1939-07-08 1939-07-08

Publications (1)

Publication Number Publication Date
GB542695A true GB542695A (en) 1942-01-23

Family

ID=21989887

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10586/40A Expired GB542695A (en) 1939-07-08 1940-06-19 Improvements in lighting apparatus and methods of making same

Country Status (2)

Country Link
BE (1) BE542695A (fr)
GB (1) GB542695A (fr)

Also Published As

Publication number Publication date
BE542695A (fr) 1959-09-11

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