FR843909A - Perfectionnements apportés aux haveuses de charbonnage - Google Patents

Perfectionnements apportés aux haveuses de charbonnage

Info

Publication number
FR843909A
FR843909A FR843909DA FR843909A FR 843909 A FR843909 A FR 843909A FR 843909D A FR843909D A FR 843909DA FR 843909 A FR843909 A FR 843909A
Authority
FR
France
Prior art keywords
improvements made
coal miners
miners
coal
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
English (en)
French (fr)
Inventor
Alexander Anderson
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.)
Anderson Boyes and Co Ltd
Original Assignee
Anderson Boyes and Co Ltd
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 Anderson Boyes and Co Ltd filed Critical Anderson Boyes and Co Ltd
Application granted granted Critical
Publication of FR843909A publication Critical patent/FR843909A/fr
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
    • E21C25/22—Machines slitting solely by one or more cutter chains moving unidirectionally along jibs
    • E21C25/50—Machines slitting solely by one or more cutter chains moving unidirectionally along jibs with equipment for cleaning the slit

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)
FR843909D 1938-06-28 1938-09-26 Perfectionnements apportés aux haveuses de charbonnage Expired FR843909A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB843909X 1938-06-28

Publications (1)

Publication Number Publication Date
FR843909A true FR843909A (fr) 1939-07-12

Family

ID=10571894

Family Applications (1)

Application Number Title Priority Date Filing Date
FR843909D Expired FR843909A (fr) 1938-06-28 1938-09-26 Perfectionnements apportés aux haveuses de charbonnage

Country Status (2)

Country Link
BE (1) BE430412A (pt)
FR (1) FR843909A (pt)

Also Published As

Publication number Publication date
BE430412A (pt)

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