FR647355A - Improvements to electric lamps for mines - Google Patents

Improvements to electric lamps for mines

Info

Publication number
FR647355A
FR647355A FR647355DA FR647355A FR 647355 A FR647355 A FR 647355A FR 647355D A FR647355D A FR 647355DA FR 647355 A FR647355 A FR 647355A
Authority
FR
France
Prior art keywords
mines
electric lamps
lamps
electric
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
Eugene Clemessy
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 FR647355A publication Critical patent/FR647355A/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
    • F21V25/00—Safety devices structurally associated with lighting devices
    • F21V25/02—Safety devices structurally associated with lighting devices coming into action when lighting device is disturbed, dismounted, or broken
    • F21V25/04—Safety devices structurally associated with lighting devices coming into action when lighting device is disturbed, dismounted, or broken breaking the electric circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
FR647355D 1928-01-11 1928-01-11 Improvements to electric lamps for mines Expired FR647355A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR647355T 1928-01-11

Publications (1)

Publication Number Publication Date
FR647355A true FR647355A (en) 1928-11-23

Family

ID=9002030

Family Applications (1)

Application Number Title Priority Date Filing Date
FR647355D Expired FR647355A (en) 1928-01-11 1928-01-11 Improvements to electric lamps for mines

Country Status (1)

Country Link
FR (1) FR647355A (en)

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