GB683728A - An improved cap for the heads of pit props - Google Patents

An improved cap for the heads of pit props

Info

Publication number
GB683728A
GB683728A GB2657950A GB2657950A GB683728A GB 683728 A GB683728 A GB 683728A GB 2657950 A GB2657950 A GB 2657950A GB 2657950 A GB2657950 A GB 2657950A GB 683728 A GB683728 A GB 683728A
Authority
GB
United Kingdom
Prior art keywords
cap
heads
pit props
improved cap
tags
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
GB2657950A
Inventor
John Gordon Remington
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.)
Hubert H P Trist & Co Ltd
Original Assignee
Hubert H P Trist & 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 Hubert H P Trist & Co Ltd filed Critical Hubert H P Trist & Co Ltd
Priority to GB2657950A priority Critical patent/GB683728A/en
Publication of GB683728A publication Critical patent/GB683728A/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
    • E21D15/005—Props; Chocks, e.g. made of flexible containers filled with backfilling material characterised by the material
    • E21D15/007—Props; Chocks, e.g. made of flexible containers filled with backfilling material characterised by the material spark-reducing
    • 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
    • E21D15/54—Details of the ends of props
    • E21D15/55—Details of the ends of props of prop heads or feet

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)
  • Golf Clubs (AREA)

Abstract

683,728. Pit props. TRIST & CO., Ltd., H. H. P. Aug. 15, 1951 [Oct. 31, 1950], No. 26579/50. Class 20(ii) A cap for a pi prop comprises a moulding a asbes tos laminae having metal tags ( embedded in it which are bent under the prop head b to secure the cap. In a modification the tags are part of a metal ring embedded in the periphery of the cap.
GB2657950A 1950-10-31 1950-10-31 An improved cap for the heads of pit props Expired GB683728A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2657950A GB683728A (en) 1950-10-31 1950-10-31 An improved cap for the heads of pit props

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2657950A GB683728A (en) 1950-10-31 1950-10-31 An improved cap for the heads of pit props

Publications (1)

Publication Number Publication Date
GB683728A true GB683728A (en) 1952-12-03

Family

ID=10245850

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2657950A Expired GB683728A (en) 1950-10-31 1950-10-31 An improved cap for the heads of pit props

Country Status (1)

Country Link
GB (1) GB683728A (en)

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