FR533537A - Incandescent safety mine lamp - Google Patents

Incandescent safety mine lamp

Info

Publication number
FR533537A
FR533537A FR533537DA FR533537A FR 533537 A FR533537 A FR 533537A FR 533537D A FR533537D A FR 533537DA FR 533537 A FR533537 A FR 533537A
Authority
FR
France
Prior art keywords
incandescent
mine lamp
safety mine
safety
lamp
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)
Inventor
Louis-Ernest-Francoi Ferrette
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 filed Critical
Application granted granted Critical
Publication of FR533537A publication Critical patent/FR533537A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L23/00—Non-electric hand-lamps for miners

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
FR533537D 1921-02-23 1921-02-23 Incandescent safety mine lamp Expired FR533537A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR533537T 1921-02-23

Publications (1)

Publication Number Publication Date
FR533537A true FR533537A (en) 1922-03-04

Family

ID=8924986

Family Applications (1)

Application Number Title Priority Date Filing Date
FR533537D Expired FR533537A (en) 1921-02-23 1921-02-23 Incandescent safety mine lamp

Country Status (1)

Country Link
FR (1) FR533537A (en)

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