GB718457A - Improvements in lagging irons for mine roofs and the like - Google Patents

Improvements in lagging irons for mine roofs and the like

Info

Publication number
GB718457A
GB718457A GB9984/52A GB998452A GB718457A GB 718457 A GB718457 A GB 718457A GB 9984/52 A GB9984/52 A GB 9984/52A GB 998452 A GB998452 A GB 998452A GB 718457 A GB718457 A GB 718457A
Authority
GB
United Kingdom
Prior art keywords
iron
lagging
wedge
projections
slot
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
GB9984/52A
Other languages
English (en)
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.)
USINES ET ACIERIES LEONARD GIO
Original Assignee
USINES ET ACIERIES LEONARD GIO
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 USINES ET ACIERIES LEONARD GIO filed Critical USINES ET ACIERIES LEONARD GIO
Publication of GB718457A publication Critical patent/GB718457A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/02—Cantilever extension or similar protecting devices
    • E21D17/08—Cap joints for obtaining a coal-face free of pit-props
    • E21D17/086—Cap joints for obtaining a coal-face free of pit-props or articulated type

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Emergency Lowering Means (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Clamps And Clips (AREA)
GB9984/52A 1951-04-23 1952-04-21 Improvements in lagging irons for mine roofs and the like Expired GB718457A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE718457X 1951-04-23

Publications (1)

Publication Number Publication Date
GB718457A true GB718457A (en) 1954-11-17

Family

ID=3878822

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9984/52A Expired GB718457A (en) 1951-04-23 1952-04-21 Improvements in lagging irons for mine roofs and the like

Country Status (6)

Country Link
BE (1) BE502749A (enrdf_load_stackoverflow)
DE (1) DE1022538B (enrdf_load_stackoverflow)
FR (1) FR1054501A (enrdf_load_stackoverflow)
GB (1) GB718457A (enrdf_load_stackoverflow)
LU (1) LU31403A1 (enrdf_load_stackoverflow)
NL (1) NL83499C (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2991097A (en) * 1948-07-08 1961-07-04 Vanwersch Aloys Connecting structure for beams of a roof support or the like
DE1197417B (de) 1964-02-26 1965-07-29 Aloys Vanwersch Kappenverbindung fuer den Grubenausbau in Untertagebetrieben
US4653951A (en) * 1985-08-12 1987-03-31 General Dynamics Corp./Convair Division Zero free-play joint for deployable space structures
US4881776A (en) * 1988-11-22 1989-11-21 Casual Living International Inc. Chairs with foldable backs

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE804317C (de) * 1949-03-22 1951-04-19 Otto Leppak Verfahren zur Schaffung einer stempelfreien Abbaufront beim eisernen Strebausbau

Also Published As

Publication number Publication date
NL83499C (enrdf_load_stackoverflow)
BE502749A (enrdf_load_stackoverflow)
DE1022538B (de) 1958-01-16
FR1054501A (fr) 1954-02-11
LU31403A1 (enrdf_load_stackoverflow)

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