GB322619A - Improvements in or relating to pit props or the like - Google Patents

Improvements in or relating to pit props or the like

Info

Publication number
GB322619A
GB322619A GB3316728A GB3316728A GB322619A GB 322619 A GB322619 A GB 322619A GB 3316728 A GB3316728 A GB 3316728A GB 3316728 A GB3316728 A GB 3316728A GB 322619 A GB322619 A GB 322619A
Authority
GB
United Kingdom
Prior art keywords
cone
wedges
props
williams
cap
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
GB3316728A
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.)
MORGAN JOHN WILLIAMS
Original Assignee
MORGAN JOHN WILLIAMS
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 MORGAN JOHN WILLIAMS filed Critical MORGAN JOHN WILLIAMS
Priority to GB3316728A priority Critical patent/GB322619A/en
Publication of GB322619A publication Critical patent/GB322619A/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
    • E21D15/14—Telescopic props
    • E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
    • E21D15/32—Telescopic props with parts held relatively to each other by friction or gripping by a deformable collar or clamping means applied symmetrically inside a locking ring

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)
  • Prostheses (AREA)

Abstract

322,619. Williams, M., and Williams, M, J. Nov. 13, 1928. Mine props -Telesoopic props of the type in which an inverted cone is held in position around two telescoping tubes by means of wedges placed between the inner member and the cone, have the wedges and cone member secured together by slotted pins H passing through apertures, in flanges C<1>, D<1> provided on the cone member and wedges, respectively, and secured by cotters I. The base of the prop may be formed as a cap H and the head as a cap K, which may be adjusted by a cross wedge G passing through the slots in the tubular member and in a surrounding sleeve F.
GB3316728A 1928-11-13 1928-11-13 Improvements in or relating to pit props or the like Expired GB322619A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3316728A GB322619A (en) 1928-11-13 1928-11-13 Improvements in or relating to pit props or the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3316728A GB322619A (en) 1928-11-13 1928-11-13 Improvements in or relating to pit props or the like

Publications (1)

Publication Number Publication Date
GB322619A true GB322619A (en) 1929-12-12

Family

ID=10349416

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3316728A Expired GB322619A (en) 1928-11-13 1928-11-13 Improvements in or relating to pit props or the like

Country Status (1)

Country Link
GB (1) GB322619A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE757741C (en) * 1939-08-27 1953-11-02 Walter Hartwig Pit stamp
US3737134A (en) * 1971-06-18 1973-06-05 Afco Manuf Corp Telescoping support column

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE757741C (en) * 1939-08-27 1953-11-02 Walter Hartwig Pit stamp
US3737134A (en) * 1971-06-18 1973-06-05 Afco Manuf Corp Telescoping support column

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