GB411768A - Improvements in telescopic pit props - Google Patents

Improvements in telescopic pit props

Info

Publication number
GB411768A
GB411768A GB35607/33A GB3560733A GB411768A GB 411768 A GB411768 A GB 411768A GB 35607/33 A GB35607/33 A GB 35607/33A GB 3560733 A GB3560733 A GB 3560733A GB 411768 A GB411768 A GB 411768A
Authority
GB
United Kingdom
Prior art keywords
wedge
prop
socket
pin
pocket
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
GB35607/33A
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.)
SCHWARZ KG HERMANN
Hermann Schwarz KG
Original Assignee
SCHWARZ KG HERMANN
Hermann Schwarz KG
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 SCHWARZ KG HERMANN, Hermann Schwarz KG filed Critical SCHWARZ KG HERMANN
Publication of GB411768A publication Critical patent/GB411768A/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
    • E21D15/285—Telescopic props with parts held relatively to each other by friction or gripping by means of wedges or wedge combinations

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)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

411,768. Mine - props. SCHWARZKOMMANDIT-GES., H., Wattenscheid, Germany. Dec. 18, 1933, No. 35607. Convention date, Nov. 17. [Class 20 (ii).] Telescopic pitprops of the type in which one member slides in a pocket on another member under wedge restriction, have locking means for the pocket which can be released to allow removal of the wedge and collapse of the prop. The upper prop member b is tapered and slides in a resilient walled socket g provided at the upper end of the lower member. The socket contains a metal wedge h and packing material i disposed between the upper prop member and the wedge. The wedge bears outwardly against the socket which is stiffened at k and is surrounded by a clamp e having a pin f with an eccentric or spiral cam surface, so that after the prop has settled the wedge may be released by rotation of the pin. The wedge is provided with a stop pin n and with slots o in its rear whereby it may be raised by a lever resting on a fulcrum p. The lower member is slotted to provide access to the bottom of the upper member so that the prop can be adjusted between opposed surfaces.
GB35607/33A 1933-11-17 1933-12-18 Improvements in telescopic pit props Expired GB411768A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE411768X 1933-11-17

Publications (1)

Publication Number Publication Date
GB411768A true GB411768A (en) 1934-06-14

Family

ID=6432764

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35607/33A Expired GB411768A (en) 1933-11-17 1933-12-18 Improvements in telescopic pit props

Country Status (1)

Country Link
GB (1) GB411768A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE746107C (en) * 1934-10-27 1944-06-08 Friedrich Heckermann Iron pit stamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE746107C (en) * 1934-10-27 1944-06-08 Friedrich Heckermann Iron pit stamp

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