FR622148A - Safety device for electric mine lamps - Google Patents

Safety device for electric mine lamps

Info

Publication number
FR622148A
FR622148A FR622148DA FR622148A FR 622148 A FR622148 A FR 622148A FR 622148D A FR622148D A FR 622148DA FR 622148 A FR622148 A FR 622148A
Authority
FR
France
Prior art keywords
safety device
electric mine
mine 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
Friedrich Weissenfels
Ludwig Mandelartz
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 FR622148A publication Critical patent/FR622148A/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
    • F21L4/00—Electric lighting devices with self-contained electric batteries or cells
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L2/00—Systems of electric lighting devices
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
FR622148D 1925-11-23 1926-09-17 Safety device for electric mine lamps Expired FR622148A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE622148X 1925-11-23

Publications (1)

Publication Number Publication Date
FR622148A true FR622148A (en) 1927-05-24

Family

ID=6577660

Family Applications (1)

Application Number Title Priority Date Filing Date
FR622148D Expired FR622148A (en) 1925-11-23 1926-09-17 Safety device for electric mine lamps

Country Status (1)

Country Link
FR (1) FR622148A (en)

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