FR708424A - Improvements in illuminated projectors - Google Patents

Improvements in illuminated projectors

Info

Publication number
FR708424A
FR708424A FR708424DA FR708424A FR 708424 A FR708424 A FR 708424A FR 708424D A FR708424D A FR 708424DA FR 708424 A FR708424 A FR 708424A
Authority
FR
France
Prior art keywords
projectors
illuminated
illuminated projectors
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 Generale de Signalisation
Original Assignee
Compagnie Generale de Signalisation
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 Generale de Signalisation filed Critical Compagnie Generale de Signalisation
Application granted granted Critical
Publication of FR708424A publication Critical patent/FR708424A/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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
FR708424D 1930-12-27 1930-12-27 Improvements in illuminated projectors Expired FR708424A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR708424T 1930-12-27

Publications (1)

Publication Number Publication Date
FR708424A true FR708424A (en) 1931-07-23

Family

ID=9068895

Family Applications (1)

Application Number Title Priority Date Filing Date
FR708424D Expired FR708424A (en) 1930-12-27 1930-12-27 Improvements in illuminated projectors

Country Status (1)

Country Link
FR (1) FR708424A (en)

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