GB273983A - Improvements in or relating to pit-props - Google Patents

Improvements in or relating to pit-props

Info

Publication number
GB273983A
GB273983A GB265627A GB265627A GB273983A GB 273983 A GB273983 A GB 273983A GB 265627 A GB265627 A GB 265627A GB 265627 A GB265627 A GB 265627A GB 273983 A GB273983 A GB 273983A
Authority
GB
United Kingdom
Prior art keywords
moll
props
notches
clamping collar
pit
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
GB265627A
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.)
WALDEMAR MOLL
WILHELM MOLL
Original Assignee
WALDEMAR MOLL
WILHELM MOLL
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 WALDEMAR MOLL, WILHELM MOLL filed Critical WALDEMAR MOLL
Priority to GB265627A priority Critical patent/GB273983A/en
Publication of GB273983A publication Critical patent/GB273983A/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
    • E21D15/42—Telescopic props with parts held relatively to each other by friction or gripping with special parts to influence the friction

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

273,983. Moll, W., and Moll, W., (trading as Moll S÷hne, F. W.). Jan. 29, 9127. Mine props.-Two-part pit props of the kind having an upper tapered member 5 acapted to slide in a lower hallow member 1 through an adjustable clamping collar 7<a> have removable wooden blocks 3 fitted into the clamping collar, and the face of the upper tapered member is notched with notches of increasing depth towards its upper end whereby the frictional resistance is increased. The wood 3 is disposed cross-grained to the notches and the pressure is regulated by a member 9 and screw 8.
GB265627A 1927-01-29 1927-01-29 Improvements in or relating to pit-props Expired GB273983A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB265627A GB273983A (en) 1927-01-29 1927-01-29 Improvements in or relating to pit-props

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB265627A GB273983A (en) 1927-01-29 1927-01-29 Improvements in or relating to pit-props

Publications (1)

Publication Number Publication Date
GB273983A true GB273983A (en) 1927-07-14

Family

ID=9743417

Family Applications (1)

Application Number Title Priority Date Filing Date
GB265627A Expired GB273983A (en) 1927-01-29 1927-01-29 Improvements in or relating to pit-props

Country Status (1)

Country Link
GB (1) GB273983A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2747828A (en) * 1950-04-18 1956-05-29 Becorit Grubenausbau Gmbh Mine post

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2747828A (en) * 1950-04-18 1956-05-29 Becorit Grubenausbau Gmbh Mine post

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