FR990442A - Improvements to miners' lamps - Google Patents

Improvements to miners' lamps

Info

Publication number
FR990442A
FR990442A FR990442DA FR990442A FR 990442 A FR990442 A FR 990442A FR 990442D A FR990442D A FR 990442DA FR 990442 A FR990442 A FR 990442A
Authority
FR
France
Prior art keywords
miners
lamps
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
Ernest Vanneste
Arthur Vanneste
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 FR990442A publication Critical patent/FR990442A/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
    • F21L4/08—Electric lighting devices with self-contained electric batteries or cells characterised by means for in situ recharging of the batteries or cells

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
FR990442D 1949-07-08 1949-07-08 Improvements to miners' lamps Expired FR990442A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR990442T 1949-07-08

Publications (1)

Publication Number Publication Date
FR990442A true FR990442A (en) 1951-09-21

Family

ID=9544192

Family Applications (1)

Application Number Title Priority Date Filing Date
FR990442D Expired FR990442A (en) 1949-07-08 1949-07-08 Improvements to miners' lamps

Country Status (1)

Country Link
FR (1) FR990442A (en)

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