FR829960A - Safety device for room lighting - Google Patents

Safety device for room lighting

Info

Publication number
FR829960A
FR829960A FR829960DA FR829960A FR 829960 A FR829960 A FR 829960A FR 829960D A FR829960D A FR 829960DA FR 829960 A FR829960 A FR 829960A
Authority
FR
France
Prior art keywords
safety device
room lighting
lighting
room
safety
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
Other languages
French (fr)
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.)
Compagnie de Saint Gobain SA
Original Assignee
Compagnie de Saint Gobain SA
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 Compagnie de Saint Gobain SA filed Critical Compagnie de Saint Gobain SA
Application granted granted Critical
Publication of FR829960A publication Critical patent/FR829960A/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
    • F21V9/08—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing coloured light, e.g. monochromatic; for reducing intensity of light
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/38—Devices for influencing the colour or wavelength of the light
    • H01J61/40—Devices for influencing the colour or wavelength of the light by light filters; by coloured coatings in or on the envelope

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
FR829960D 1937-03-12 1937-03-12 Safety device for room lighting Expired FR829960A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR829960T 1937-03-12

Publications (1)

Publication Number Publication Date
FR829960A true FR829960A (en) 1938-07-18

Family

ID=9284595

Family Applications (1)

Application Number Title Priority Date Filing Date
FR829960D Expired FR829960A (en) 1937-03-12 1937-03-12 Safety device for room lighting

Country Status (1)

Country Link
FR (1) FR829960A (en)

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