GB419939A - Improved means for releasing or collapsing mine chocks and the like - Google Patents

Improved means for releasing or collapsing mine chocks and the like

Info

Publication number
GB419939A
GB419939A GB1178733A GB1178733A GB419939A GB 419939 A GB419939 A GB 419939A GB 1178733 A GB1178733 A GB 1178733A GB 1178733 A GB1178733 A GB 1178733A GB 419939 A GB419939 A GB 419939A
Authority
GB
United Kingdom
Prior art keywords
body member
chock
members
levers
pivoted
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
GB1178733A
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 GB1178733A priority Critical patent/GB419939A/en
Publication of GB419939A publication Critical patent/GB419939A/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
    • E21D15/60—Devices for withdrawing props or chocks

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)
  • Soil Working Implements (AREA)

Abstract

419,939. Mine chocks. KAY, P., 1, Quality Row, Ryhope, near Sunderland. April 22, 1933, No. 11787. [Class 20 (ii).] A releasable chock for use in mines comprises a U-shaped body member 1 with sloping ends 2, pivoted chock supporting members 7, and disengageable locking means for retaining these supporting members in load-bearing positions. The members 7 have curved faces to contact with the base of the body member whereby their pivots are relieved of strain and they are stiffened by internal gusset plates 7<a>. The locking means consists of two levers 8 and 9 pivoted at 5 to the body member and provided with interfitting ends 8<a> and 9<a> for locking, one of the levers having a trigger extension to receive blows for unlocking. The body member is provided with projections such as 12 for positioning coacting wooden chock members 14. Specifications 342,046, 356,284, and 383,340 are referred to.
GB1178733A 1933-04-22 1933-04-22 Improved means for releasing or collapsing mine chocks and the like Expired GB419939A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1178733A GB419939A (en) 1933-04-22 1933-04-22 Improved means for releasing or collapsing mine chocks and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1178733A GB419939A (en) 1933-04-22 1933-04-22 Improved means for releasing or collapsing mine chocks and the like

Publications (1)

Publication Number Publication Date
GB419939A true GB419939A (en) 1934-11-22

Family

ID=9992688

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1178733A Expired GB419939A (en) 1933-04-22 1933-04-22 Improved means for releasing or collapsing mine chocks and the like

Country Status (1)

Country Link
GB (1) GB419939A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2723100A (en) * 1951-04-13 1955-11-08 Muschamp Norman James Releasable supports for roofs in underground mines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2723100A (en) * 1951-04-13 1955-11-08 Muschamp Norman James Releasable supports for roofs in underground mines

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