GB337283A - Improvements relating to pit props - Google Patents

Improvements relating to pit props

Info

Publication number
GB337283A
GB337283A GB59630A GB59630A GB337283A GB 337283 A GB337283 A GB 337283A GB 59630 A GB59630 A GB 59630A GB 59630 A GB59630 A GB 59630A GB 337283 A GB337283 A GB 337283A
Authority
GB
United Kingdom
Prior art keywords
wedge
improvements relating
socket
socket member
pit props
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
GB59630A
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
Priority to GB59630A priority Critical patent/GB337283A/en
Publication of GB337283A publication Critical patent/GB337283A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/50—Component parts or details of props
    • E21D15/52—Extensible units located above or below standard props

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Clamps And Clips (AREA)

Abstract

337,283. Sopwith, S. F., and Foggo, M. J. Jan. 7, 1930. Mine props of the type described in Specification 277,484, in which a socket member is adjusted on a main member by means of a transverse wedge passing through apertures in the socket member, have the wedge d provided with curved projections f at the narrow end which are adapted normally to enter recesses h provided in lugs g on the socket member to retain the wedge in the socket. These recesses are open at the tops in order that the projections may be released from the grooves when necessary.
GB59630A 1930-01-07 1930-01-07 Improvements relating to pit props Expired GB337283A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB59630A GB337283A (en) 1930-01-07 1930-01-07 Improvements relating to pit props

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB59630A GB337283A (en) 1930-01-07 1930-01-07 Improvements relating to pit props

Publications (1)

Publication Number Publication Date
GB337283A true GB337283A (en) 1930-10-30

Family

ID=9707149

Family Applications (1)

Application Number Title Priority Date Filing Date
GB59630A Expired GB337283A (en) 1930-01-07 1930-01-07 Improvements relating to pit props

Country Status (1)

Country Link
GB (1) GB337283A (en)

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