FR593983A - Coal mining machine - Google Patents

Coal mining machine

Info

Publication number
FR593983A
FR593983A FR593983DA FR593983A FR 593983 A FR593983 A FR 593983A FR 593983D A FR593983D A FR 593983DA FR 593983 A FR593983 A FR 593983A
Authority
FR
France
Prior art keywords
coal mining
mining machine
coal
machine
mining
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)
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.)
Jeffrey Manufacturing Co
Original Assignee
Jeffrey Manufacturing Co
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 Jeffrey Manufacturing Co filed Critical Jeffrey Manufacturing Co
Application granted granted Critical
Publication of FR593983A publication Critical patent/FR593983A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
    • E21C25/68—Machines for making slits combined with equipment for removing, e.g. by loading, material won by other means

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
FR593983D 1924-03-08 1925-02-14 Coal mining machine Expired FR593983A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US593983XA 1924-03-08 1924-03-08

Publications (1)

Publication Number Publication Date
FR593983A true FR593983A (en) 1925-09-04

Family

ID=22022689

Family Applications (1)

Application Number Title Priority Date Filing Date
FR593983D Expired FR593983A (en) 1924-03-08 1925-02-14 Coal mining machine

Country Status (1)

Country Link
FR (1) FR593983A (en)

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