FR493788A - Illuminated reflector arrangement for lighting dark rooms - Google Patents

Illuminated reflector arrangement for lighting dark rooms

Info

Publication number
FR493788A
FR493788A FR493788DA FR493788A FR 493788 A FR493788 A FR 493788A FR 493788D A FR493788D A FR 493788DA FR 493788 A FR493788 A FR 493788A
Authority
FR
France
Prior art keywords
reflector arrangement
dark rooms
illuminated reflector
lighting dark
lighting
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.)
J G WILSON CORP
Original Assignee
J G WILSON 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 J G WILSON CORP filed Critical J G WILSON CORP
Application granted granted Critical
Publication of FR493788A publication Critical patent/FR493788A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S11/00—Non-electric lighting devices or systems using daylight

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
FR493788D 1917-11-26 1918-12-12 Illuminated reflector arrangement for lighting dark rooms Expired FR493788A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US493788XA 1917-11-26 1917-11-26

Publications (1)

Publication Number Publication Date
FR493788A true FR493788A (en) 1919-08-21

Family

ID=1529501

Family Applications (1)

Application Number Title Priority Date Filing Date
FR493788D Expired FR493788A (en) 1917-11-26 1918-12-12 Illuminated reflector arrangement for lighting dark rooms

Country Status (1)

Country Link
FR (1) FR493788A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0020296A1 (en) * 1979-06-05 1980-12-10 Relium AG Method and means for controlling the radiation energy of the total spectrum in rooms

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0020296A1 (en) * 1979-06-05 1980-12-10 Relium AG Method and means for controlling the radiation energy of the total spectrum in rooms

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