FR516771A - Improvements to electric projectors - Google Patents

Improvements to electric projectors

Info

Publication number
FR516771A
FR516771A FR516771A FR516771DA FR516771A FR 516771 A FR516771 A FR 516771A FR 516771 A FR516771 A FR 516771A FR 516771D A FR516771D A FR 516771DA FR 516771 A FR516771 A FR 516771A
Authority
FR
France
Prior art keywords
projectors
electric
electric 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
FR516771A
Other languages
French (fr)
Inventor
William Morris Mordey
Gwylim Anwyl Hughes
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR516771A publication Critical patent/FR516771A/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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B31/00—Electric arc lamps
    • H05B31/02—Details
    • H05B31/04—Housings

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
FR516771A 1918-07-10 1920-06-10 Improvements to electric projectors Expired FR516771A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB516771X 1918-07-10

Publications (1)

Publication Number Publication Date
FR516771A true FR516771A (en) 1921-04-26

Family

ID=10460966

Family Applications (1)

Application Number Title Priority Date Filing Date
FR516771A Expired FR516771A (en) 1918-07-10 1920-06-10 Improvements to electric projectors

Country Status (1)

Country Link
FR (1) FR516771A (en)

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