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FR524273A - Improvements to electrical equipment - Google Patents

Improvements to electrical equipment

Info

Publication number
FR524273A
FR524273A FR524273A FR524273DA FR524273A FR 524273 A FR524273 A FR 524273A FR 524273 A FR524273 A FR 524273A FR 524273D A FR524273D A FR 524273DA FR 524273 A FR524273 A FR 524273A
Authority
FR
France
Prior art keywords
electrical equipment
electrical
equipment
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
FR524273A
Other languages
French (fr)
Inventor
Haydn Thies Harrison
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 FR524273A publication Critical patent/FR524273A/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)
FR524273A 1919-04-07 1920-09-16 Improvements to electrical equipment Expired FR524273A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB524273X 1919-04-07

Publications (1)

Publication Number Publication Date
FR524273A true FR524273A (en) 1921-09-01

Family

ID=10463885

Family Applications (1)

Application Number Title Priority Date Filing Date
FR524273A Expired FR524273A (en) 1919-04-07 1920-09-16 Improvements to electrical equipment

Country Status (1)

Country Link
FR (1) FR524273A (en)

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