FR1236833A - Improvement in signaling devices, in particular light signaling - Google Patents

Improvement in signaling devices, in particular light signaling

Info

Publication number
FR1236833A
FR1236833A FR69039779A FR69039779A FR1236833A FR 1236833 A FR1236833 A FR 1236833A FR 69039779 A FR69039779 A FR 69039779A FR 69039779 A FR69039779 A FR 69039779A FR 1236833 A FR1236833 A FR 1236833A
Authority
FR
France
Prior art keywords
signaling
improvement
particular light
devices
signaling devices
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
FR69039779A
Other languages
French (fr)
Inventor
Jacques-Daniel Mantello
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
Priority to FR69039779A priority Critical patent/FR1236833A/en
Application granted granted Critical
Publication of FR1236833A publication Critical patent/FR1236833A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/12—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using drilling pipes with plural fluid passages, e.g. closed circulation systems
    • 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
    • F21V15/00—Protecting lighting devices from damage
    • F21V15/04—Resilient mountings, e.g. shock absorbers 

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Engineering & Computer Science (AREA)
FR69039779A 1959-09-29 1959-09-29 Improvement in signaling devices, in particular light signaling Expired FR1236833A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR69039779A FR1236833A (en) 1959-09-29 1959-09-29 Improvement in signaling devices, in particular light signaling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR69039779A FR1236833A (en) 1959-09-29 1959-09-29 Improvement in signaling devices, in particular light signaling

Publications (1)

Publication Number Publication Date
FR1236833A true FR1236833A (en) 1960-11-21

Family

ID=1569387

Family Applications (1)

Application Number Title Priority Date Filing Date
FR69039779A Expired FR1236833A (en) 1959-09-29 1959-09-29 Improvement in signaling devices, in particular light signaling

Country Status (1)

Country Link
FR (1) FR1236833A (en)

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