GB416999A - An improved collapsible pit prop - Google Patents

An improved collapsible pit prop

Info

Publication number
GB416999A
GB416999A GB1442933A GB1442933A GB416999A GB 416999 A GB416999 A GB 416999A GB 1442933 A GB1442933 A GB 1442933A GB 1442933 A GB1442933 A GB 1442933A GB 416999 A GB416999 A GB 416999A
Authority
GB
United Kingdom
Prior art keywords
prop
wedge
plate
flanges
disposed
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
GB1442933A
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.)
HORACE WILLIAM GOER FERGUSON
Raine & Co Ltd
THOMAS ERNEST MARCH
Original Assignee
HORACE WILLIAM GOER FERGUSON
Raine & Co Ltd
THOMAS ERNEST MARCH
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 HORACE WILLIAM GOER FERGUSON, Raine & Co Ltd, THOMAS ERNEST MARCH filed Critical HORACE WILLIAM GOER FERGUSON
Priority to GB1442933A priority Critical patent/GB416999A/en
Publication of GB416999A publication Critical patent/GB416999A/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
    • E21D15/02—Non-telescopic props
    • E21D15/06—Non-telescopic props with parts joined by a lock, with or without slight axial adjustability
    • E21D15/08—Non-telescopic props with parts joined by a lock, with or without slight axial adjustability with toggle joint connection

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)
  • Road Paving Structures (AREA)

Abstract

416,999. Mine-props. RAINE & CO., Ltd., FERGUSON, H. W. G., and MARCH, T. E., Gibb Chambers, Westgate Road, Newcastle-on-Tyne. May 18, 1933, Nos. 14429 and 16285. Addition to 400,457. [Class 20 (ii).] A modification of the collapsable metal pit-prop described in the parent Specification consists of the use of an axially sliding wedge-member 6, Fig. 1, disposed between the flanges of one prop member 1, to slide over the joint between the two prop members, and against an abutment member 5 disposed between the flanges of the other prop member 2. Alternatively, the wedge, or a parallel plate 9, Fig. 5, may be actuated by a lever 8, having an extension which enters a slot in the wedge or plate, and an eccentric boss which bears upon the surface of the plate when this is in the locking position.
GB1442933A 1933-05-18 1933-05-18 An improved collapsible pit prop Expired GB416999A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1442933A GB416999A (en) 1933-05-18 1933-05-18 An improved collapsible pit prop

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1442933A GB416999A (en) 1933-05-18 1933-05-18 An improved collapsible pit prop

Publications (1)

Publication Number Publication Date
GB416999A true GB416999A (en) 1934-09-26

Family

ID=10041054

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1442933A Expired GB416999A (en) 1933-05-18 1933-05-18 An improved collapsible pit prop

Country Status (1)

Country Link
GB (1) GB416999A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2780067A (en) * 1951-05-15 1957-02-05 Gutehoffnungshuette Oberhausen Roof supporting means or cap and a method of positioning the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2780067A (en) * 1951-05-15 1957-02-05 Gutehoffnungshuette Oberhausen Roof supporting means or cap and a method of positioning the same

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