FR693583A - Improvements to electric lighting devices - Google Patents

Improvements to electric lighting devices

Info

Publication number
FR693583A
FR693583A FR693583DA FR693583A FR 693583 A FR693583 A FR 693583A FR 693583D A FR693583D A FR 693583DA FR 693583 A FR693583 A FR 693583A
Authority
FR
France
Prior art keywords
lighting devices
electric lighting
electric
devices
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.)
Trouvay and Cauvin SA
Original Assignee
Trouvay and Cauvin 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 Trouvay and Cauvin SA filed Critical Trouvay and Cauvin SA
Application granted granted Critical
Publication of FR693583A publication Critical patent/FR693583A/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
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
FR693583D 1930-04-09 1930-04-09 Improvements to electric lighting devices Expired FR693583A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR693583T 1930-04-09

Publications (1)

Publication Number Publication Date
FR693583A true FR693583A (en) 1930-11-21

Family

ID=9041756

Family Applications (1)

Application Number Title Priority Date Filing Date
FR693583D Expired FR693583A (en) 1930-04-09 1930-04-09 Improvements to electric lighting devices

Country Status (1)

Country Link
FR (1) FR693583A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2447923A (en) * 1944-08-26 1948-08-24 Holophane Co Inc Lighting system and lighting units for use therein

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2447923A (en) * 1944-08-26 1948-08-24 Holophane Co Inc Lighting system and lighting units for use therein

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