FR462943A - Improvements to punching machines - Google Patents

Improvements to punching machines

Info

Publication number
FR462943A
FR462943A FR462943A FR462943DA FR462943A FR 462943 A FR462943 A FR 462943A FR 462943 A FR462943 A FR 462943A FR 462943D A FR462943D A FR 462943DA FR 462943 A FR462943 A FR 462943A
Authority
FR
France
Prior art keywords
punching machines
punching
machines
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
FR462943A
Other languages
French (fr)
Inventor
Valentin Gebhardt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 by Individual filed Critical Individual
Application granted granted Critical
Publication of FR462943A publication Critical patent/FR462943A/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
    • E21B1/00—Percussion drilling
    • E21B1/02—Surface drives for drop hammers or percussion drilling, e.g. with a cable

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)
FR462943A 1912-09-14 1913-09-13 Improvements to punching machines Expired FR462943A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE462943X 1912-09-14

Publications (1)

Publication Number Publication Date
FR462943A true FR462943A (en) 1914-02-09

Family

ID=1502074

Family Applications (1)

Application Number Title Priority Date Filing Date
FR462943A Expired FR462943A (en) 1912-09-14 1913-09-13 Improvements to punching machines

Country Status (1)

Country Link
FR (1) FR462943A (en)

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