GB620341A - Improvements in or relating to coal cutting machines - Google Patents

Improvements in or relating to coal cutting machines

Info

Publication number
GB620341A
GB620341A GB70347A GB70347A GB620341A GB 620341 A GB620341 A GB 620341A GB 70347 A GB70347 A GB 70347A GB 70347 A GB70347 A GB 70347A GB 620341 A GB620341 A GB 620341A
Authority
GB
United Kingdom
Prior art keywords
coal
machine
cutting machines
relating
coal cutting
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
GB70347A
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.)
LOGAN MINING MACHINERY Co
WILLIAM ARCHIBALD LOGAN
Original Assignee
LOGAN MINING MACHINERY Co
WILLIAM ARCHIBALD LOGAN
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 LOGAN MINING MACHINERY Co, WILLIAM ARCHIBALD LOGAN filed Critical LOGAN MINING MACHINERY Co
Priority to GB70347A priority Critical patent/GB620341A/en
Publication of GB620341A publication Critical patent/GB620341A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C29/00—Propulsion of machines for slitting or completely freeing the mineral from the seam
    • E21C29/04—Propulsion of machines for slitting or completely freeing the mineral from the seam by cable or chains
    • E21C29/14—Propulsion of machines for slitting or completely freeing the mineral from the seam by cable or chains by haulage cable or chain pulling the machine along the working face
    • E21C29/145—Means for tensioning the haulage chains or cables

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)
  • Sawing (AREA)

Abstract

620,341. Coal-cutting machines. LOGAN, W. A., and LOGAN MINING MACHINERY CO., Ltd. Jan. 8, 1947, No. 703. Drawings to Specification. [Class 68 (i)] For freeing a coal-cutting machine when jammed in the coal face, the machine is provided, in addition to the means for traversing the machine along the working face in normal working, with a capstan placed rearwardly and adapted to engage one end of a fixed chain, the other end of which is attachable to a fixed object. The capstan may be driven from the machine motor through a clutch. Specification 117,552, [Class 68 (i)], is referred to.
GB70347A 1947-01-08 1947-01-08 Improvements in or relating to coal cutting machines Expired GB620341A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB70347A GB620341A (en) 1947-01-08 1947-01-08 Improvements in or relating to coal cutting machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB70347A GB620341A (en) 1947-01-08 1947-01-08 Improvements in or relating to coal cutting machines

Publications (1)

Publication Number Publication Date
GB620341A true GB620341A (en) 1949-03-23

Family

ID=9709068

Family Applications (1)

Application Number Title Priority Date Filing Date
GB70347A Expired GB620341A (en) 1947-01-08 1947-01-08 Improvements in or relating to coal cutting machines

Country Status (1)

Country Link
GB (1) GB620341A (en)

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